CN108155464A - A kind of satellite navigation terminal antennae structure - Google Patents
A kind of satellite navigation terminal antennae structure Download PDFInfo
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- CN108155464A CN108155464A CN201711454382.5A CN201711454382A CN108155464A CN 108155464 A CN108155464 A CN 108155464A CN 201711454382 A CN201711454382 A CN 201711454382A CN 108155464 A CN108155464 A CN 108155464A
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- Prior art keywords
- oscillator
- minor matters
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- antenna
- feed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
The embodiment of the invention discloses a kind of satellite navigation terminal antennae structure, including：Circuit board, oscillator structure and feed structure, oscillator structure include orthogonal first group of oscillator structure and second group of oscillator structure, and every group of oscillator structure unit includes the first oscillator structure unit and the second oscillator structure unit that are oppositely arranged；Oscillator structure unit includes：The bar shaped oscillator that is fixedly connected with circuit board first surface is fixedly connected and not parallel the first minor matters and the second minor matters with bar shaped oscillator, first minor matters and the second minor matters do not contact, to realize the covering of two-band using first group of oscillator structure and second group of oscillator structure, and it is received in same band limits using the first minor matters and the second minor matters, the aerial signal of different frequency, increase the frequency bandwidth of antenna structure institute reception antenna signal, solve the problems, such as that antenna structure of the prior art is of high cost, weight is big and antenna performance is poor.
Description
Technical field
The present invention relates to technical field of satellite navigation more particularly to a kind of satellite navigation terminal antennae structures.
Background technology
It is fast with Global Navigation Satellite System (Global Navigation Satellite System, guide number SS)
Speed development, terminal device navigates to multisystem, positioning is also more and more extensive with the demand of measurement capability.And satellite navigation terminal
The antenna important component indispensable as satellite navigation terminal equipment, in order to meet compatible multi-satellite navigation system terminal
The application demand of equipment should have the features such as wider gain wide-band, axial ratio bandwidth and stronger compatibility.
According to the design requirement of current high-precision multisystem GNSS measurement type antennas, satellite navigation terminal antennae will not only be protected
Card has the advantages such as high-gain, broad beam, broadband, while also to consider stable antenna phase center, anti-multipath effect and knot
The features such as structure is compact.
The prior art mainly adopts the double frequency covering that double-deck microstrip antenna realizes antenna, and pass through and increase microstrip antenna
Dielectric thickness increases the bandwidth of antenna, and the increase of dielectric thickness can not only increase product cost, can also increase product weight,
So that the cost of existing satellite navigation terminal antennae is higher, weight is larger.Moreover, in microstrip antenna dielectric thickness increase
It can also cause the surface wave of microstrip antenna to increase, influence satellite navigation terminal antennae performance.
Invention content
In order to solve the above technical problems, an embodiment of the present invention provides a kind of satellite navigation terminal antennae structure, to reduce
The cost and weight of the antenna structure improve antenna performance.
To solve the above problems, an embodiment of the present invention provides following technical solutions：
A kind of satellite navigation terminal antennae structure, including：
Circuit board, the first surface on the circuit board are provided with earth plate, and second surface is provided with feeding network, described
Second surface and first surface are opposite；
Positioned at the oscillator structure of the circuit board first surface, the oscillator structure includes first group of oscillator structure and second
Group oscillator structure, wherein, every group of oscillator structure unit includes the first oscillator structure unit and the second oscillator structure that are oppositely arranged
Unit, and first group of oscillator structure and second group of oscillator structure are vertically arranged；
Positioned at the feed structure of the circuit board first surface, the feed structure includes the first couple feed structure and the
Two couple feed structures, wherein, the first couple feed structure is located at the first oscillator structure described in first group of oscillator structure
Between unit and the second oscillator structure unit, the second couple feed structure is located in second group of oscillator structure first and shakes
Between minor structure unit and the second oscillator structure unit, and the first couple feed structure and the second couple feed structure
It does not contact；
Wherein, the oscillator structure unit includes：The bar shaped oscillator being fixedly connected with the circuit board first surface and institute
Bar shaped oscillator is stated to be fixedly connected and the first not parallel minor matters and be fixedly connected with the bar shaped oscillator and not parallel second
Minor matters, first minor matters and second minor matters do not contact；
The couple feed structure includes the first feed branch and the second feed branch, wherein, first feed branch
For coupling the signal in its corresponding described first oscillator structure unit, second feed branch is corresponding for coupling its
Signal in the second oscillator structure unit.
Optionally, on the direction of the first surface, the height of the oscillator structure unit is greater than or equal to
The height of the couple feed structure.
Optionally, the first oscillator structure unit described in every group of oscillator structure unit and the second oscillator structure unit with
The center of the circuit board is centrosymmetric distribution.
Optionally, the shape of the bar shaped oscillator is trapezoidal or rectangle.
Optionally, the angle value range between first minor matters and the first surface is 0 ° -90 °, including 0 °, but
Do not include 90 °；Angle value range between second minor matters and the first surface is 0 ° -90 °, including 0 °, but is not wrapped
Include 90 °.
Optionally, the shape of first minor matters is rectangle, sector or trapezoidal；The shape of second minor matters is rectangular
Shape, sector or trapezoidal.
Optionally, the length of first feed branch is more than the length of second feed branch, and first feedback
Electric branch is connected with the tributary port in the feeding network.
Optionally, it further includes：
Positioned at least one set of parasitic element of the circuit board first surface, one group of parasitic element includes multiple parasitisms
Unit, the multiple parasitic element are located at the periphery of the oscillator structure, and in the multiple parasitic element and the circuit board
The distance between heart is equal.
Optionally, the distance between two described parasitic elements of arbitrary neighborhood are equal in the multiple parasitic element.
Optionally, at least one set of parasitic element includes multigroup parasitic element, difference group parasitic element and the circuit
The distance between plate center is unequal.
Compared with prior art, above-mentioned technical proposal has the following advantages：
The satellite navigation terminal antennae structure that the embodiment of the present invention is provided receives the using first group of oscillator structure
The aerial signal of one frequency band receives the aerial signal of second frequency section using second group of oscillator structure, wherein, described the
One frequency band and second frequency section difference, so that the antenna structure that the embodiment of the present invention is provided can realize double frequency
The covering of section, without using double-deck microstrip antenna, reducing the cost and weight of the antenna structure.
Moreover, in the satellite navigation terminal antennae structure that the embodiment of the present invention is provided, the oscillator structure unit includes：
The bar shaped oscillator that is fixedly connected with the circuit board first surface is fixedly connected and not parallel first with the bar shaped oscillator
It section and is fixedly connected with the bar shaped oscillator and the second not parallel minor matters, first minor matters and second minor matters do not connect
It touches, so as to be received in same band limits using first minor matters and second minor matters, the antenna letter of different frequency
Number, increase the frequency bandwidth of antenna structure institute reception antenna signal.
In conclusion the satellite navigation terminal antennae structure that the embodiment of the present invention is provided can realize two-band, broadband
Covering, realize double frequency so as to solve antenna structure of the prior art by increasing microstrip antenna quantity and dielectric thickness
Section, wide band covering when introduced it is of high cost, weight is big and antenna performance is poor the problem of.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
The structure diagram of satellite navigation terminal antennae structure that Fig. 1 is provided by one embodiment of the invention；
The structural representation of feed structure in the satellite navigation terminal antennae structure that Fig. 2 is provided by one embodiment of the invention
Figure；
The vertical view of satellite navigation terminal antennae structure that Fig. 3 is provided by one embodiment of the invention；
The side view for the antenna structure that Fig. 4 is provided by one embodiment of the invention；
Gain patterns of the Fig. 5 by the antenna structure that one embodiment of the invention provides at high band center frequency point；
Fig. 6 is by the satellite navigation terminal antennae structure that one embodiment of the invention provides at low frequency section center frequency point
Gain pattern.
Specific embodiment
, below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
Implemented using other different from other manner described here, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
Just as described in the background section, the cost of existing satellite navigation terminal antennae is higher, and weight is larger, and surface wave
More, antenna performance is poor.
In view of this, an embodiment of the present invention provides a kind of satellite navigation terminal antennae structure, which can be wide
The general high-acruracy survey that the fields such as training are driven for geodesic survey, Ocean Surveying, building deformation monitoring, terrain detection, Driving Test.
Specifically, as shown in Figure 1, the antenna structure includes：
Circuit board 3, the first surface on the circuit board 3 are provided with earth plate 31, and second surface is provided with feeding network
32, the second surface and first surface are opposite；
Positioned at the oscillator structure 10 of 3 first surface of circuit board, the oscillator structure 10 includes first group of oscillator structure
20 and second group of oscillator structure 30, wherein, the first oscillator structure unit and second that every group of oscillator structure includes being oppositely arranged shakes
Minor structure unit, and first group of oscillator structure 20 and second group of oscillator structure 30 are vertically arranged, i.e., described first group of oscillator
Line and second group of oscillator described in structure 20 between first oscillator structure unit and the second oscillator structure unit
Line described in structure 30 between first oscillator structure unit and the second oscillator structure unit intersects vertically；
Positioned at the feed structure 40 of 3 first surface of circuit board, the feed structure 40 includes the first couple feed knot
50 and second couple feed structure 60 of structure, wherein, the first couple feed structure 50 is located at first group of oscillator structure 20
Described between the first oscillator structure unit and the second oscillator structure unit, the second couple feed structure 60 is located at institute
It states in second group of oscillator structure 30 between first oscillator structure unit and the second oscillator structure unit；
Wherein, the oscillator structure unit includes：The bar shaped oscillator being fixedly connected with the first surface of the circuit board 3
13rd, be fixedly connected with the bar shaped oscillator 13 and the first not parallel minor matters 11 and be fixedly connected with the bar shaped oscillator 13 and
The second not parallel minor matters 12, first minor matters 11 and second minor matters 12 do not contact；
As shown in Fig. 2, the couple feed structure includes the first feed branch 21 and the second feed branch 22, wherein, institute
The first feed branch 21 is stated for coupling the signal in its corresponding described first oscillator structure unit, second feed branch
22 are used to couple the signal in its corresponding described second oscillator structure unit.
It should be noted that doublet antenna is one kind of antenna type, also referred to as dipole antenna.Wherein, symmetrically
The simplest structure of oscillator is by both ends length, thickness is identical and the conducting wire of centre position feed forms, institute of the embodiment of the present invention
In the antenna structure of offer, the antenna of first group of oscillator structure 20 composition is to be poised for battle element antenna, second group of oscillator
The antenna that structure 30 forms is also to be poised for battle element antenna.Again since each oscillator structure unit includes the first minor matters 11 and second
12 Liang Ge branches of minor matters, therefore, the alternatively referred to as double minor matters oscillator structure lists of the oscillator structure unit that the embodiment of the present invention is provided
Member.
In embodiments of the present invention, each oscillator structure unit is uniformly and symmetrically distributed (i.e. described first in the oscillator structure
Group oscillator structure 20 and second group of oscillator structure 30 intersect vertically, the first oscillator structure unit and the in every group of oscillator structure unit
Two oscillator structure units are centrosymmetric) it can ensure that the satellite-signal from different direction receives feed placement by antenna
Distance it is as close as possible, improve antenna performance.
And the effect of n-point feed is better than the effect of single-point feedback, theoretically distributing point is more, and phase center is more stable, but
Be considered according to actual design, such as the loss of the complexity of feeding network, feeding network, what the embodiment of the present invention was provided
Antenna structure uses duplex feeding, i.e., is presented using the first couple feed structure 50 and the second couple feed structure 60
Electricity.But the present invention does not limit this, specifically depends on the circumstances.
It should be noted that due in the feed structure 40, the first couple feed structure 50 and second coupling
The current feed phase of feed structure 60 is different, in order to enable the antenna structure realizes circular polarization radiation, in embodiments of the present invention,
The first couple feed structure 50 and the second couple feed structure 60 are spatially orthogonal, i.e., described first couple feed
Orthographic projection of the structure 50 on the circuit board 3 and orthographic projection of the second couple feed structure 60 on the circuit board 3
It is mutually perpendicular to.
During specific work, each oscillator structure unit in the oscillator structure 10 is for reception antenna signal, and described the
The aerial signal that each oscillator structure unit receives in one group of oscillator structure 20 by way of couple feed, is coupled to described the
In one couple feed structure 50, the feeding network that is transferred to by the first couple feed structure 50 in the circuit board 3, institute
The aerial signal that each oscillator structure unit receives in second group of oscillator structure 30 is stated, by way of couple feed, is coupled to institute
It states in the second couple feed structure 60, and the feeding network 32 is transferred to by the second couple feed structure 60.It is described
The day that the aerial signal and second group of oscillator structure 30 that feeding network 32 receives first group of oscillator structure 20 receive
Line signal integration is exported, i.e., described feeding network 32 exports the first couple feed structure 50 into after a signal
Linear polarization signal carried out with the linear polarization signal processing that the second couple feed structure 60 exports into a circularly polarized signal
Output.Wherein, the aerial signal frequency band and second group of oscillator structure 30 that first group of oscillator structure 20 receives receive
Aerial signal frequency band it is different.
It should be noted that couple feed is a kind of feeding classification, in the feeding classification, feed structure is (i.e. of the invention
Couple feed structure in embodiment) do not have between antenna oscillator unit (the oscillator structure unit i.e. in the embodiment of the present invention)
It is in direct contact, but with a small distance, the conduction of electric flux is carried out by way of coupling.
Optionally, in embodiments of the present invention, the structure of each oscillator structure unit is identical in the oscillator structure 10,
In order to the design of the antenna structure, while it can ensure that the antenna structure meets the finger of the phase centre stability of antenna
Mark requirement.
From the foregoing, it will be observed that the satellite navigation terminal antennae structure that the embodiment of the present invention is provided, utilizes first group of oscillator
Structure 20 receives the aerial signal of first frequency section, and the antenna that second frequency section is received using second group of oscillator structure 30 is believed
Number, wherein, the first frequency section and second frequency section difference, so that the day knot that the embodiment of the present invention is provided
Structure can realize the covering of two-band, without using double-deck microstrip antenna, reduce the antenna structure cost and
Weight.
Moreover, in the satellite navigation terminal antennae structure that the embodiment of the present invention is provided, the oscillator structure unit includes：
The bar shaped oscillator 13 that is fixedly connected with 3 first surface of circuit board is fixedly connected and not parallel with the bar shaped oscillator 13
It first minor matters 11 and is fixedly connected with the bar shaped oscillator 13 and the second not parallel minor matters 12, first minor matters 11 and institute
It states the second minor matters 12 not contact, so as to receive same band limits using first minor matters 11 and second minor matters 12
Interior, the aerial signal of different frequency increases the frequency bandwidth of antenna structure institute reception antenna signal.
It can be seen from the above, the satellite navigation terminal antennae structure that the embodiment of the present invention is provided can realize two-band, wideband
The covering of band realizes double frequency so as to solve antenna structure of the prior art by increasing microstrip antenna quantity and dielectric thickness
Section, wide band covering when introduced it is of high cost, weight is big and antenna performance is poor the problem of.
On the basis of any of the above-described embodiment, in one embodiment of the invention, in the couple feed structure
First feed branch 21 and/or the second feed branch 22 it is corresponding bar shaped oscillator 13 it is parallel, to improve the oscillator structure
Coupling efficiency between the corresponding feed branch of unit improves antenna performance.
On the basis of above-described embodiment, in one embodiment of the invention, described in every group of oscillator structure unit
One oscillator structure unit and the second oscillator structure unit are centrosymmetric distribution with the center of the circuit board 3, i.e., described
First oscillator structure unit and the second oscillator structure unit are in center with the center of the circuit board 3 in first group of oscillator structure 20
Symmetrical, first oscillator structure unit and the second oscillator structure unit are with the circuit board in second group of oscillator structure 30
3 center is centrosymmetric distribution, so as to improve the phase centre stability of the antenna structure.
It should be noted that since first group of oscillator structure 20 and second group of oscillator structure 30 are vertically arranged, i.e. institute
State the line described in first group of oscillator structure 20 between first oscillator structure unit and the second oscillator structure unit and institute
The line stated described in second group of oscillator structure 30 between first oscillator structure unit and the second oscillator structure unit is vertical
It is intersecting, therefore, in embodiments of the present invention, in the vertical view of the oscillator structure 10, as shown in figure 3, each oscillator structure list
Member is located in each branch of cross-shaped configuration, and the center of the cross-shaped configuration is the center of the circuit board 3, adjacent vibration generators structure
Unit is in 90 degree with 3 line of centres of circuit board.Correspondingly, the first couple feed structure 50 described in the feed structure 40
Phase difference between the second couple feed structure 60 is 90 degree.Specifically, in one embodiment of the invention, the phase
The realization of the devices such as existing 3dB electric bridges may be used in potential difference, and the present invention is not limited symmetrically, specifically depended on the circumstances.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the oscillator structure unit passes through
The bar shaped oscillator 13 is fixedly connected with the earth plate 31 of the circuit board 3, and the mode of being fixedly connected can be welding, can also
It is fixed for screw, wherein, the welding can be that scolding tin welds, or electric welding, the present invention do not limit this, as long as
It can ensure that the bar shaped oscillator 13 comes into full contact with the earth plate 31.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the shape of the bar shaped oscillator 13
Can be trapezoidal, or rectangle can also be other types shape, as long as strip, when specifically making,
On the basis of meeting actual demand, based on easy to use, the present invention does not limit this, depends on the circumstances.
It should be noted that when doublet antenna is fed, high-frequency current can be generated on bar shaped oscillator and minor matters, this electricity
Stream will generate radiation field.Briefly, the path length that electric current flows through be the corresponding wavelength of antenna resonant frequency, different length,
Shape, the minor matters of angle, current path, current distribution, electric field distribution on bar shaped oscillator are all different, corresponding antennas
Resonant frequency is also different.
Therefore, in embodiments of the present invention, the aerial signal of the reception of the first minor matters 11 described in the antenna structure is humorous
Vibration frequency is largely that the length to be combined by 13 and first minor matters 11 of bar shaped oscillator in oscillator structure unit determines
, and the height between first minor matters 11 and the earth plate 31 affects the gain direction of its reception antenna signal
Figure, therefore, the antenna structure that the embodiment of the present invention is provided can be adjusted flexibly described first in application according to actual demand
The length of minor matters 11 and its distance between with earth plate 31, but the present invention does not limit this, specifically depends on the circumstances.Its
In, the height between first minor matters 11 and the earth plate 31 refers to the connection of first minor matters 11 and bar shaped oscillator 13
Position is the distance between to the earth plate 31.
Similarly, the resonant frequency for the aerial signal that the second minor matters 12 described in the antenna structure receive is largely
What the length to be combined by 13 and second minor matters 12 of bar shaped oscillator in oscillator structure unit determined, and second minor matters 12
Height between the earth plate 31 affects the gain pattern of its reception antenna signal, therefore, the embodiment of the present invention
In application the length of second minor matters 12 according to actual demand, can be adjusted flexibly and its with connecing in the antenna structure provided
The distance between floor 31, but the present invention does not limit this, specifically depends on the circumstances.Wherein, second minor matters 12 with
Height between the earth plate 31 refers to the link position of second minor matters 12 and bar shaped oscillator 13 to the earth plate 31
The distance between.
It should also be noted that, in embodiments of the present invention, it is any in first minor matters 11 and second minor matters 12
The change of position, length and/or the shape of minor matters etc., the resonant frequency Duan Youying for the aerial signal that not only minor matters are received
It rings, also has subtle effects to the resonant frequency of aerial signal that another minor matters receive, therefore, the embodiment of the present invention is to described first
Correlation between minor matters 11 and second minor matters 12 does not limit, and specifically depends on the circumstances.
Specifically, on the basis of any of the above-described embodiment, in one embodiment of the invention, first minor matters 11
Shape can be rectangle, or it is trapezoidal, can also be the shapes such as sector or the deformation of these shapes, the present invention is right
This is not limited, and is specifically depended on the circumstances.Similarly, the shape of second minor matters 12 may be rectangle, it is trapezoidal or fan
The deformation of the shapes such as shape or these shapes, the present invention also do not limit this, specifically depend on the circumstances.
It should be noted that in embodiments of the present invention, the shape of first minor matters 11 and second minor matters 12 can
It with identical, can also be different, the present invention does not limit this, specifically depends on the circumstances.
On the basis of any of the above-described embodiment, the angle value model between first minor matters 11 and the first surface
It is 0 ° -90 ° to enclose, and including 0 °, but does not include 90 °；Angle value range between second minor matters 12 and the first surface
It is 0 ° -90 °, including 0 °, but does not include 90 °.It should be noted that in embodiments of the present invention, first minor matters 11 and institute
Stating the corner dimension that is formed between the angle formed between first surface and second minor matters 12 and the first surface can be with
It is identical, it can also be different, the present invention does not limit this, as long as ensureing first minor matters 11 and second minor matters 12 not
Contact.
On the basis of above-described embodiment, in one embodiment of the invention, in order to ensure first minor matters 11
With second minor matters 12 it is discontiguous on the basis of, increase the angle formed between first minor matters 11 and the first surface
Accommodative facility and/or increase the accommodative facility of angle formed between second minor matters 12 and the first surface,
First minor matters 11 are connected with the bar shaped oscillator 13 by first level connecting portion, second minor matters 12 and the bar shaped
Oscillator 13 is connected by the second horizontal connection portion, with increase the space between first minor matters 11 and second minor matters 12 away from
From.
Specifically, in one embodiment of the invention, the angle between first minor matters 11 and the first surface
It it is 20 degree, the angle between second minor matters 12 and the first surface is 30 degree, and the side of the oscillator structure unit is
The F type structures of one deformation, as shown in Figure 4.
On the basis of any of the above-described embodiment, in one embodiment of the invention, institute in the couple feed structure
The first feed branch 21 is stated with second feed branch 22 by connecting branch to be connected, optionally, first feed branch
21 perpendicular to the first surface, second feed branch 22 perpendicular to the first surface, the connection leg parallel in
The first surface correspondingly, the bar shaped oscillator 13 is also perpendicularly to the first surface, so as to improve coupling efficiency, improves
Antenna performance, while design difficulty can also be reduced.
On the basis of above-described embodiment, in one embodiment of the invention, the length of first feed branch 21
More than the length of second feed branch 22, i.e., in embodiments of the present invention, the shape of the couple feed structure is η types,
And first feed branch 21 is connected with the tributary port in the feeding network, so that a couple feed structure and institute
Feeding network is stated only by a tributary port to be connected.Optionally, first feed branch 21 passes through on the circuit board 3
Via be connected with the tributary port in the feeding network.Wherein, the company of first feed branch and the tributary port
The mode of connecing can be that welding (such as scolding tin welding) be fixedly connected with mode, and the present invention does not limit this, specifically optionally and
It is fixed.
Specifically, on the basis of above-described embodiment, in one embodiment of the invention, the first couple feed knot
The length of the first feed branch 21 in structure 50 is more than the length of the first feed branch 21 in the second couple feed structure 60,
So that the connection branch in the first couple feed structure 50 is higher than the connection branch in the second couple feed structure 60
Road ensures that the first couple feed structure 50 and the second couple feed structure 60 do not contact, the present invention to this not
It limits, in other embodiments of the invention, the length of the first feed branch 21 in the first couple feed structure 50
The length of the first feed branch 22 in the second couple feed structure 60 is might be less that, as long as ensureing the first coupling feedback
The whole of electric structure 50 and the second couple feed structure 60 composition is projected as cross, and institute on the circuit board 3
It states the first couple feed structure 50 and the second couple feed structure 60 does not contact.
It should be noted that in the above-described embodiments, ensureing the first couple feed structure 50 and second coupling
Close feed structure 60 it is discontiguous on the basis of, on the direction of the first surface, the first couple feed structure
The distance between 50 and the second couple feed structure 60 are the smaller the better, to ensure the first couple feed structure 50 and institute
The phase difference for stating the second couple feed structure 60 is stablized, so as to ensure the circular polarisation effect of the antenna structure.
On the basis of above-described embodiment, in one embodiment of the invention, perpendicular to the side of the first surface
Upwards, the height of the oscillator structure unit is greater than or equal to the height of the couple feed structure (described in including but not limited to
The height of first feed branch is more than the height of the bar shaped oscillator) so that the feed branch of the couple feed structure can
With all for coupled antenna signal.But the present invention does not limit this, specifically depends on the circumstances.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the feeding network is with 90 °
The either T-shaped power splitter with 90 ° of phase differences or the 3dB couplings with 90 ° of phase differences of the Wilkinson power divider of phase difference
Device, so that 90 degree of phase difference is formed between the first couple feed structure 50 and the second couple feed structure 60,
So as to fulfill the circular polarisation effect of antenna.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the antenna structure further includes：Position
In at least one set of parasitic element of 3 first surface of circuit board, one group of parasitic element includes multiple parasitic elements 4, institute
State the periphery that multiple parasitic elements 4 are located at the oscillator structure, and the multiple parasitic element 4 and 3 center of circuit board it
Between distance it is equal, to improve the low elevation gain of the antenna structure and/or beam angle.
It should be noted that multipath effect is one of appreciable error source for influencing satellite navigation range accuracy, signal passes through
Ground and neighbouring object (such as building) reflection, the multipath signal and direct signal of formation are received by the antenna together.Due to
The multipath signal of different scenes is usually incoherent, it is difficult to eliminated from receiver by differential technique, and to difference
It is also infeasible that varying environment residing for receiver antenna, which carries out modeling, can only improve ability of anti-multipath by antenna to reduce
The influence of multipath.And in embodiments of the present invention, the antenna structure can by set parasitic element 4 quantity and arrangement side
Formula to adjust the directional diagram of antenna, inhibits antenna backlobe gain, improves ability of anti-multipath.
Specifically, on the basis of above-described embodiment, in one embodiment of the invention, the multiple parasitic element 4
The distance between the middle parasitic element 4 of arbitrary neighborhood two is equal, i.e., the multiple parasitic element 4 is on the loop that it is surrounded
It is uniformly distributed, to improve the phase centre stability of the antenna structure, and improves the anti-multipath effect energy of the antenna structure
Power ensures that the antenna structure receives the stability of satellite-signal.
Specifically, on the basis of any of the above-described embodiment, in one embodiment of the invention, the parasitic element 4
It is fixedly connected with the earth plate 31, and vertical with the earth plate 31, wherein, the mode being fixedly connected can be weldering
Connect, or be screwed or with the earth plate 31 together other fixed forms such as punch forming, the present invention to this simultaneously
It does not limit, as long as ensureing that the parasitic element 4 comes into full contact with the earth plate 31.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the shape of the parasitic element 4 can
Think rectangle, may be trapezoidal, can also be the shapes such as fan-shaped or hexagon or the deformation of these shapes, the present invention is to this
It does not limit, specifically depends on the circumstances.
It should be noted that since the quantity of the parasitic element 4, shape and size are different, the ruler of the antenna structure
Very little, low elevation gain and anti-multipath effect capability are also different, and therefore, the present invention is to quantity, shape and the ruler of the parasitic element 4
Very little grade does not limit, and specifically depends on the circumstances.
Specifically, in one embodiment of the invention, the quantity of parasitic element 4 is 24 in one group of parasitic element
It is a, it is highly 12mm, width 8mm, so that 20 ° of elevation gains are more than -3dB at center of antenna frequency point, multipath effect value is small
In 0.5m etc..
On the basis of any of the above-described embodiment, in one embodiment of the invention, at least one set parasitic element
Including multigroup parasitic element, the distance between parasitic element 4 and 3 center of circuit board in different groups of parasitic element are no
It is equal, to arrange by the nesting of multigroup parasitic element, further improve the performance of the antenna structure.The present invention to this not
It limits, specifically depends on the circumstances.
On the basis of any of the above-described embodiment, in one embodiment of the invention, the oscillator in the antenna structure
Structure 10, feed structure 40 and/or parasitic element 4 are made of copper sheet, preferably scale copper, to reduce the antenna structure
Weight meets the needs of antenna is lightening.Specifically, in one embodiment of the invention, the oscillator in the antenna structure
The making material of structure 10, feed structure 40 and/or parasitic element 4 be 0.5mm red copper or brass, but the present invention to this not
It limits, specifically depends on the circumstances.
As shown in Figure 5 and Figure 6, Fig. 5 by the antenna structure that the embodiment of the present invention provides at high band center frequency point
Gain pattern, gain patterns of the Fig. 6 by the antenna structure that the embodiment of the present invention provides at low frequency section center frequency point,
Wherein, solid line is right-handed circular polarization gain curve figure, and dotted line is left-hand circular polarization gain curve figure.From Fig. 5 and Fig. 6 it is found that originally
The antenna structure that inventive embodiments are provided, no matter in high band or low-frequency range, the right-handed circular polarization of the antenna structure increases
Yidu is much larger than left-hand circular polarization gain, and antenna performance is preferable, and beam angle is wider, integral radiation better performances.Wherein, wave
Beam width refers to that, in greatest irradiation direction both sides, radiant power declines the angle of the both direction of 3dB.
In conclusion the satellite navigation terminal antennae structure that the embodiment of the present invention is provided can realize two-band, broadband
Covering, realize double frequency so as to solve antenna structure of the prior art by increasing microstrip antenna quantity and dielectric thickness
Section, wide band covering when introduced it is of high cost, weight is big and antenna performance is poor the problem of.
Various pieces are described by the way of progressive in this specification, and what each some importance illustrated is and other parts
Difference, just to refer each other for identical similar portion between various pieces.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
Embodiment illustrated herein is not intended to be limited to, and is to fit to consistent with the principles and novel features disclosed herein
Most wide range.
Claims (10)
1. a kind of satellite navigation terminal antennae structure, which is characterized in that including：
Circuit board, the first surface on the circuit board are provided with earth plate, and second surface is provided with feeding network, and described second
Surface and first surface are opposite；
Positioned at the oscillator structure of the circuit board first surface, the oscillator structure includes first group of oscillator structure and second group is shaken
Minor structure, wherein, every group of oscillator structure unit includes the first oscillator structure unit and the second oscillator structure unit that are oppositely arranged,
And first group of oscillator structure and second group of oscillator structure are vertically arranged；
Positioned at the feed structure of the circuit board first surface, the feed structure includes the first couple feed structure and the second coupling
Feed structure is closed, wherein, the first couple feed structure is located at the first oscillator structure unit described in first group of oscillator structure
And second between oscillator structure unit, the second couple feed structure is located at the first oscillator knot in second group of oscillator structure
Between structure unit and the second oscillator structure unit, and the first couple feed structure and the second couple feed structure do not connect
It touches；
Wherein, the oscillator structure unit includes：The bar shaped oscillator being fixedly connected with the circuit board first surface and the item
Shape oscillator is fixedly connected and the first not parallel minor matters and is fixedly connected with the bar shaped oscillator and the second not parallel minor matters,
First minor matters and second minor matters do not contact；
The couple feed structure includes the first feed branch and the second feed branch, wherein, first feed branch is used for
The signal in its corresponding described first oscillator structure unit is coupled, second feed branch is corresponding described for coupling its
Signal in second oscillator structure unit.
2. antenna structure according to claim 1, which is characterized in that on the direction of the first surface, institute
The height for stating oscillator structure unit is greater than or equal to the height of the couple feed structure.
3. antenna structure according to claim 1, which is characterized in that the first oscillator knot described in every group of oscillator structure unit
Structure unit and the second oscillator structure unit are centrosymmetric distribution with the center of the circuit board.
4. antenna structure according to claim 3, which is characterized in that the shape of the bar shaped oscillator is trapezoidal or rectangular
Shape.
5. antenna structure according to claim 3, which is characterized in that between first minor matters and the first surface
Angle value range is 0 ° -90 °, including 0 °, but does not include 90 °；Angle between second minor matters and the first surface
Value range is 0 ° -90 °, including 0 °, but does not include 90 °.
6. antenna structure according to claim 3, which is characterized in that the shape of first minor matters is rectangle, sector
It is or trapezoidal；The shape of second minor matters is rectangle, sector or trapezoidal.
7. antenna structure according to claim 1, which is characterized in that the length of first feed branch is more than described the
The length of two feed branch, and first feed branch is connected with the tributary port in the feeding network.
8. antenna structure according to claim 1, which is characterized in that further include：
Positioned at least one set of parasitic element of the circuit board first surface, one group of parasitic element includes multiple parasitic single
Member, the multiple parasitic element are located at the periphery of the oscillator structure, and the multiple parasitic element and the circuit board center
The distance between it is equal.
9. antenna structure according to claim 8, which is characterized in that two institutes of arbitrary neighborhood in the multiple parasitic element
It is equal to state the distance between parasitic element.
10. antenna structure according to claim 8, which is characterized in that at least one set parasitic element includes multigroup post
Raw unit, difference group the distance between parasitic element and the circuit board center are unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711454382.5A CN108155464A (en) | 2017-12-28 | 2017-12-28 | A kind of satellite navigation terminal antennae structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454382.5A CN108155464A (en) | 2017-12-28 | 2017-12-28 | A kind of satellite navigation terminal antennae structure |
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| CN108155464A true CN108155464A (en) | 2018-06-12 |
Family
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| CN201711454382.5A Pending CN108155464A (en) | 2017-12-28 | 2017-12-28 | A kind of satellite navigation terminal antennae structure |
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| WO2021000097A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna and electronic device |
| CN112886226A (en) * | 2021-01-12 | 2021-06-01 | 重庆邮电大学 | Broadband low-profile back-reflection circularly polarized antenna and back-reflection method thereof |
| WO2024179120A1 (en) * | 2023-02-27 | 2024-09-06 | 华为技术有限公司 | Antenna and communication device |
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| US7710342B2 (en) * | 2007-05-24 | 2010-05-04 | Spx Corporation | Crossed-dipole antenna for low-loss IBOC transmission from a common radiator apparatus and method |
| US20110279339A1 (en) * | 2010-05-13 | 2011-11-17 | Ronald Johnston | Dual circularly polarized antenna |
| CN104409842A (en) * | 2014-11-27 | 2015-03-11 | 广州中海达卫星导航技术股份有限公司 | Single-layer broadband GNSS (Global Navigation Satellite System) measurement antenna |
| CN107134648A (en) * | 2016-02-29 | 2017-09-05 | 南京理工大学 | A kind of wideband dual polarized electromagnetic dipole antenna of L-band |
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| US7710342B2 (en) * | 2007-05-24 | 2010-05-04 | Spx Corporation | Crossed-dipole antenna for low-loss IBOC transmission from a common radiator apparatus and method |
| US20110279339A1 (en) * | 2010-05-13 | 2011-11-17 | Ronald Johnston | Dual circularly polarized antenna |
| CN104409842A (en) * | 2014-11-27 | 2015-03-11 | 广州中海达卫星导航技术股份有限公司 | Single-layer broadband GNSS (Global Navigation Satellite System) measurement antenna |
| CN107134648A (en) * | 2016-02-29 | 2017-09-05 | 南京理工大学 | A kind of wideband dual polarized electromagnetic dipole antenna of L-band |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021000097A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna and electronic device |
| CN112886226A (en) * | 2021-01-12 | 2021-06-01 | 重庆邮电大学 | Broadband low-profile back-reflection circularly polarized antenna and back-reflection method thereof |
| WO2024179120A1 (en) * | 2023-02-27 | 2024-09-06 | 华为技术有限公司 | Antenna and communication device |
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