CN2850011Y - Antenna for mobile communication substation - Google Patents
Antenna for mobile communication substation Download PDFInfo
- Publication number
- CN2850011Y CN2850011Y CN 200520065159 CN200520065159U CN2850011Y CN 2850011 Y CN2850011 Y CN 2850011Y CN 200520065159 CN200520065159 CN 200520065159 CN 200520065159 U CN200520065159 U CN 200520065159U CN 2850011 Y CN2850011 Y CN 2850011Y
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- antenna
- feed
- body chamber
- reflection
- knot
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Abstract
The utility model discloses an antenna for mobile communication base stations, which comprises a reflecting back cavity, a feed source arranged on the front of the reflecting back cavity, a subreflector arranged on the front of the feed source and a feeder line which is matched with the feed source. The utility model is characterized in that the feed source is a bowtie antenna. The antenna of the utility model has the advantages of simple structure, higher gain and low side lobe and has dual polarization function, and is suitable for mobile communication base stations in the UHF frequency range as well as television transmitting station stations.
Description
Technical field
The utility model relates to resonant aerial, especially the mobile communication base station use, by the antenna of wire antenna and surface antenna combination.
Background technology
Radiotechnics is owing to the development of semiconductor device art, and the groundwork frequency improves constantly, the hyperfrequency uhf band: 300MH--3000MH) become the groundwork frequency range.The cellular mobile communication of broad development just is operated in this frequency range.Mobile communication wireless ground nerve of a covering is very flourishing, and antenna for base station is guaranteeing to play a part very key aspect the communication quality.Thereby the technical performance index of antenna for base station there is very high requirement.
Uhf band is on the radio high frequency frequency, belongs to the low frequency end of microwave, is being lower than uhf band, and radio antenna is selected the wire antenna form for use usually, is higher than uhf band, and it is main surface antenna form that antenna is selected parabolic antenna for use.Uhf band is in the transition region of two class antenna forms, and two class antennas all show tangible limitation in this frequency range, is difficult to adapt to separately the high performance requirement of antenna for base station.Four dipole antenna forms of line face combination are mainly used in the mobile communication base station at present, are referred to as board-like directional antenna, also have slot antenna or microstrip antenna form on a small quantity.
The backfire antenna form is that a kind of outstanding line face that is applicable to uhf band is in conjunction with antenna.Its typical feature is the characteristics of high-gain, high calibre usage factor, Low Sidelobe and high front and back specific characteristic.These characteristics are well suited for being used for antenna of mobile communication base station, but owing to its contour structures complexity causes manufacturing and installs and fixes comparatively complicated.Narrow bandwidth, feedback connect the factors such as complexity of matching problem, have limited the popularity of using.At present, backfire antenna uses in military, digital signal relay wireless transmission system.
The mobile communication base station is used board-like directional antennas and rod-type omnidirectional antennas more at present.The array antenna that the basic structure of these antenna is made up of a plurality of vertically first antennas is in the hope of there being higher antenna gain.The individual antenna that multiple antenna constitutes is because introduced the vertical direction array factor, and its height pattern will divide, and forms many secondary lobe and zero point, and the result is that main lobe sharply reduces along with gain improves.This directional diagram is unfavorable for that the base station covers gain and the serious contradiction of directivity factor index to the best of cellular cell.At simultaneously more zero point, directly cause some weak areas of coverage.
The utility model content
The purpose of this utility model is exactly the superior function at backfire antenna, transforms its application limitation, provide a kind of simple in structure, have higher gain, Low Sidelobe, have the dual polarization function, be applicable to the antenna that use the mobile communication base station of uhf band.
For reaching above-mentioned purpose, the technical scheme that the utility model employing is following: the antenna of this mobile communication base station use, comprise and reflect back of the body chamber, be located at the feed subreflector preceding before the chamber is carried on the back in reflection with being located at feed, and with the feeder line that feed is complementary, it is characterized in that feed is the knot antenna.
In order to realize orthogonal polarization, described feed is two pairs of knot antennas that quadrature is placed.
Described reflection back of the body chamber can be circle, square or rectangle.As a kind of improvement, described reflection back of the body chamber is the rectangle that has side ring.
As preferred embodiment a kind of, the length of described rectangle is n λ, and wide is λ, and the side ring height is 0.25 λ, and wherein λ is a working frequency range centre frequency wavelength, and n is a natural number, and n gets 2 the bests.
In order to make the distance between subreflector and the feed adjustable, so that adjust resonance frequency, be fixed with a screw rod on the front side axis of described feed, described subreflector is installed on this screw rod.
Described feeder line has two, two feeder lines insert from two feeder heads respectively, pass outside the reflection back of the body chamber, outside reflection back of the body chamber, pass the hole of reflection back of the body chamber and feed fixed mount central authorities, arrive the knot antenna, pass two holes that are distributed on the wherein a pair of knot antenna more from top to bottom respectively, the arrival reflection is carried on the back the chamber and is carried on the back the chamber connection with reflection.For fixing feeder line, there is twice groove longitudinally described feed fixed mount both sides, and the part of described two feeder lines from the knot antenna to reflection back of the body chamber is separately fixed at this two groove.
The utility model has adopted the knot antenna with broadband character as feed, and the knot antenna is the complanation form of biconical antenna, has very wide frequency bandwidth characteristics, and its broadband impedance characteristic has the effect of simplifying the system that connects.The knot antenna that quadrature is placed is convenient to realize orthogonal polarization, meets the requirement of mobile communication dual polarized antenna.The feeder line access way of the utility model uniqueness can be offset the imaginary part of the complex impedance of feed impedance, realizes good impedance matching.By regulating the relative position between subreflector and the reflection back of the body chamber, adjustable impedance makes it reach the standing-wave ratio value of instructions for use fully.
The standing-wave ratio of present domestic PHS (Personal Handyphone System) communication base station antenna is substantially less than 1.5 scope, and isolation is about 25dB, and front and back are than substantially about 20dB.And the density of network is increasing now, and the interference between the base station becomes the very big factor that influences network quality, and every index of antenna certainly will require can be more and more higher.Antenna of the present utility model is as PHS communication base station antenna, the detection that detects through mobile communication product quality supervision and test center, Ministry of Information Industry Guangzhou, 17th Research Institute of China Electronics Technology Group Corporation Kai Er laboratory and 39 inspection centers of research institute of China Electronic Science and Technology Corporation respectively, standing-wave ratio is less than 1.3, isolation is at 49dB, front and back are than about 30dB, certain leading position is arranged technically, meet the demand of future development.Antenna applications of the present utility model has obtained good technical effect equally in the base stations in mobile communication system of multiple different frequency ranges such as GSM, 3G.
Antenna structure of the present utility model is simple, has higher gain, Low Sidelobe, has the dual polarization function, and use the mobile communication base station that is suitable for uhf band, also is suitable for using in the transmission of television station.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described in detail.
A kind of execution mode of Fig. 1 antenna of the present utility model partly cut open vertical view.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 to Figure 11 is the performance map of antenna applications of the present utility model when the PHS base station, wherein:
Fig. 3 is the standing wave pattern of a feeder line interface;
Fig. 4 is the standing wave pattern of another feeder line interface;
Fig. 5 is+45 ° of polarization 1880MHz E face directional diagrams gain 11.47dBi, 50.4 ° of vertical plane half-power beam widths;
Fig. 6 is+45 ° of polarization 1920MHz E face directional diagrams gain 11.73dBi, 49.5 ° of vertical plane half-power beam widths;
Fig. 7 is+45 ° of polarization 1880MHz H face directional diagrams gain 9.68dBi, 64.8 ° of vertical plane half-power beam widths;
Fig. 8 is+45 ° of polarization 1920MHz H face directional diagrams gain 9.71dBi, 61.2 ° of vertical plane half-power beam widths;
Fig. 9 is-45 ° of polarization 1880MHz E face directional diagrams, gain 11.36dBi, 52.2 ° of vertical plane half-power beam widths;
Figure 10 is-45 ° of polarization 1920MHz E face directional diagrams, gain 12.16dBi, 45.9 ° of vertical plane half-power beam widths;
Figure 11 is-45 ° of polarization 1880MHz H face directional diagrams, gain 9.14dBi, 68.4 ° of vertical plane half-power beam widths;
Figure 12 is-45 ° of polarization 1920MHz H face directional diagrams, gain 9.52dBi, 62.1 ° of vertical plane half-power beam widths.
Embodiment
As shown in Figure 1, 2, feed 2, subreflector 3, feeder line 4 and the feeder head 5 etc. formed of two pairs of knot antennas 21 placing by reflection back of the body chamber 1, by quadrature of antenna of the present utility model are formed.Reflection back of the body chamber 1 is a rectangle that has side ring, and the length of rectangle is 2 λ, and wide is λ, and side ring 11 height are 0.25 λ, and wherein λ is a working frequency range centre frequency wavelength.Reflection back of the body chamber 1 central authorities are feed fixed mounts 6, and feed 2 just is fixedly mounted on this fixed mount 6.Be a screw rod 7 on the axis of feed 2 front sides, subreflector 3 is installed on this screw rod 7.According to different needs, can be fixed on differing heights on the screw rod 7 to subreflector 3.There is twice groove 61 longitudinally feed fixed mount 6 both sides.
Two feeder lines 4 insert from two feeder heads 5 respectively, pass outside the reflection back of the body chamber 1, outside reflection back of the body chamber 1, pass the hole 62 of reflection back of the body chamber 1 and feed fixed mount 6 central authorities, arrive knot antenna 21, pass respectively from top to bottom again and be distributed on the wherein a pair of knot antenna two holes of 21, along the groove 61 of fixed mount 6 both sides, the arrival reflection is carried on the back chamber 1 and is carried on the back chamber 1 connection with reflection.
From Fig. 3 to Figure 12 as seen, antenna applications of the present utility model is the PHS communication base station of 1880MHz～1920MHz in frequency range, and higher gain, Low Sidelobe have the dual polarization function.
Claims (8)
1, a kind of antenna of mobile communication base station use, comprise reflection back of the body chamber (1), be located at the preceding feed (2) in reflection back of the body chamber (1) and be located at the preceding subreflector (3) of feed, and with the feeder line (4) that feed is complementary, it is characterized in that: described feed (2) is a knot antenna (21).
2, antenna according to claim 1 is characterized in that: two pairs of knot antennas (21) that described feed (2) is placed for quadrature.
3, antenna according to claim 2 is characterized in that: described reflection back of the body chamber (1) is for having the rectangle of side ring (11).
4, antenna according to claim 3 is characterized in that: the length of described rectangle is n λ, and wide is λ, and side ring (11) height is 0.25 λ, and wherein λ is a working frequency range centre frequency wavelength, and n is a natural number.
5, antenna according to claim 4 is characterized in that: described n gets 2.
6, antenna according to claim 3 is characterized in that: be fixed with a screw rod (7) on the front side axis of described feed (2), described subreflector (7) is installed on this screw rod (7).
7, antenna according to claim 3, it is characterized in that: described feeder line (4) is two, two feeder lines (4) insert from two feeder heads (5) respectively, pass outside the reflection back of the body chamber (1), outside reflection back of the body chamber (1), pass the hole (62) of reflection back of the body chamber (1) and feed fixed mount (6) central authorities, arrival knot antenna (21) passes two holes that are distributed on the wherein a pair of knot antenna (21) more from top to bottom respectively, and the arrival reflection is carried on the back chamber (1) and carried on the back chamber (1) connection with reflection.
8, antenna according to claim 7 is characterized in that: there is twice groove (61) longitudinally described feed fixed mount (6) both sides, and the part of described two feeder lines (4) from knot antenna (21) to reflection back of the body chamber (1) is separately fixed at this two groove (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065159 CN2850011Y (en) | 2005-09-29 | 2005-09-29 | Antenna for mobile communication substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065159 CN2850011Y (en) | 2005-09-29 | 2005-09-29 | Antenna for mobile communication substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2850011Y true CN2850011Y (en) | 2006-12-20 |
Family
ID=37522491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520065159 Expired - Lifetime CN2850011Y (en) | 2005-09-29 | 2005-09-29 | Antenna for mobile communication substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2850011Y (en) |
-
2005
- 2005-09-29 CN CN 200520065159 patent/CN2850011Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090722 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |