CN104300218A - Umbrella-shaped coplanar dipole antenna of trapped-wave reflector - Google Patents
Umbrella-shaped coplanar dipole antenna of trapped-wave reflector Download PDFInfo
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- CN104300218A CN104300218A CN201410522004.6A CN201410522004A CN104300218A CN 104300218 A CN104300218 A CN 104300218A CN 201410522004 A CN201410522004 A CN 201410522004A CN 104300218 A CN104300218 A CN 104300218A
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Abstract
The invention relates to an umbrella-shaped coplanar dipole antenna of a trapped-wave reflector. The umbrella-shaped coplanar dipole antenna consists of umbrella-shaped dipole radiation patches (1), a feed transmission line (2), a dielectric substrate (5) and the trapped-wave reflector (6), wherein two umbrella-shaped dipole radiation patches are printed on the same side of the dielectric substrate (5) and are respectively connected with a conduction band (3) and a ground (4) of the feed transmission line at the transmission line tail end (10). The trapped-wave reflector (6) is composed of two micro-strip transmission lines (7), wherein the micro-strip transmission lines (7) are equal in length, terminals of the micro-strip transmission lines (7) are open, and a conduction band and a ground of each of the micro-strip transmission lines (7) are respectively connected with the conduction band (3) and the ground (4) of the feed transmission line at a loading point (9) of the trapped-wave reflector. The trapped-wave reflector loaded by the antenna can serve as a reflector to improve the gain of the antenna within a working frequency band of the antenna, and meanwhile can serve as a filter to inhibit radiation of the antenna within a trapped-wave frequency band lower than the working frequency band.
Description
Technical field
The present invention relates to a kind of antenna, especially a kind of umbrella shape coplanar dipole antenna of trap reflector, belong to the technical field that antenna manufactures.
Background technology
Antenna, not only can radiation or receive useful radiofrequency signal as front-end devices important in wireless communication system, and for other the useless or unwanted signals dropped in its working frequency range, antenna also can carry out indiscriminate radiation or reception.In some cases, this situation can cause larger interference to antenna receive-transmit system, the image frequency signal interference such as, existed in superheterodyne receiver.Super heterodyne architectures is owing to having higher sensitivity and selectivity, and it has a wide range of applications in Modern Communication System and radar system, and therefore image frequency braking measure is essential.Conventional solution for insert mirror filter in radio circuit, thus filters out the image frequency signal in Received signal strength.This reduces the performance of system to a certain extent, has increased the weight of the burden of system, has added cost needs simultaneously.Having the antenna of trap or filtering characteristic, can carry out filtering to some special frequency channel, had the function of antenna and filter concurrently, is the effective ways addressed this problem.
Umbrella shape element antenna, as a kind of microstrip antenna, has possessed that the low section of microstrip antenna, low cost, volume are little, lightweight, the easy advantage such as integrated with circuit board, while umbrella shape element radiates patch size less, apply widely in modern wireless communication systems.But its gain is lower, be not suitable for the occasion that some gain requirements is high.
Summary of the invention
Technical problem: the present invention seeks to the umbrella shape coplanar dipole antenna proposing a kind of trap reflector, the trap reflector of this antenna had both had the effect of reflector, gain in Antenna Operation frequency range is improved, also there is trap characteristic simultaneously, the aerial radiation of a certain frequency range lower than operating frequency of antenna is inhibited, and antenna structure is simple, size is less.
Technical scheme: the umbrella shape coplanar dipole antenna of trap reflector of the present invention comprises two panels umbrella shape element radiates paster, feeding transmission line, medium substrate and trap reflector; Umbrella shape element radiates paster, feeding transmission line and trap reflector are all on medium substrate; The shape of two panels umbrella shape element radiates paster is rectangle, two panels umbrella shape element radiates paster becomes that umbrella shape is opened, its subtended angle is between 120 degree to 160 degree, two panels umbrella shape element radiates paster is printed on the same face of medium substrate, a slice umbrella shape element radiates paster is directly connected with the conduction band of feeding transmission line, and another sheet umbrella shape oscillator paster is connected at the end of feeding transmission line with the ground of the feeding transmission line of medium substrate another side through metalized ground via hole; The microstrip transmission line that trap reflector is opened a way by two section terminations is formed, and the conduction band of microstrip transmission line and ground are printed on the two sides of medium substrate respectively; Trap reflector load(ing) point is between the input and end of feeding transmission line; At trap reflector load(ing) point, the microstrip transmission line of two section termination open circuits becomes symmetry shape to be placed in the both sides of feeding transmission line respectively, its direction of extension is vertical with the direction of feeding transmission line, and the conduction band of microstrip transmission line is connected with ground with the conduction band of feeding transmission line respectively with ground.
The width on the ground of described feeding transmission line is the widest at input, then narrows gradually, between input and the load(ing) point of trap reflector, becomes the width the same with the conduction band of feeding transmission line.
The length of two sections of microstrip transmission lines of described trap reflector is equal, and its length is about 1/4th of trap wavelength, to realize the radiation of suppressing antenna in a certain trap frequency range.
The length of every section of microstrip transmission line of described trap reflector is longer than the length of umbrella shape element radiates paster, to realize the effect of reflector; And spacing between the load(ing) point of trap reflector and the end of feeding transmission line be about carry out near 1/4th operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
In the trap frequency range lower than operating frequency of antenna, due to two sections of microstrip transmission line open-end of trap reflector, and the length of every section is about 1/4th of trap wavelength, therefore the load(ing) point of trap reflector on feeding transmission line, look in direction to every section of microstrip transmission line, its input impedance is zero, therefore the load(ing) point place of trap reflector on feeding transmission line, and total input impedance is zero.Therefore the umbrella shape coplanar dipole antenna of trap reflector is equivalent to the transmission line of terminal short circuit in trap frequency range, input signal load(ing) point place of trap reflector on feeding transmission line of antenna is totally reflected and is fed back into end, thus inhibit the aerial radiation of this frequency range, form trap characteristic.At the working frequency range of antenna, the length forming two sections of microstrip transmission lines of trap reflector will be greater than 1/4th operation wavelengths, thus be greater than the length of antenna umbrella shape element radiates paster, therefore trap reflector can realize the characteristic of its reflector, and antenna gain is improved.
The length forming two sections of microstrip transmission lines of trap reflector determines operating frequency corresponding to trap characteristic, and therefore, the length of adjustment two sections of microstrip transmission lines, directly can regulate the trap frequency of trap reflector.
The operating frequency of umbrella shape element antenna, is determined by the length of its umbrella shape element radiates paster, and therefore, the length of adjustment umbrella shape element radiates paster, directly can regulate the operating frequency of antenna.
Corresponding to the operating frequency of umbrella shape element antenna, the spacing between the load(ing) point of trap reflector and the end of feeding transmission line be about carry out near 1/4th operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
Beneficial effect: the invention has the beneficial effects as follows, the umbrella shape coplanar dipole antenna of the trap reflector proposed, its trap reflector can as reflector in the working frequency range of antenna, improve the gain of antenna, trap reflector also has trap effect simultaneously, can filtering trap in-band signal to the interference of antenna, obtain stronger suppression in the gain of trap frequency range internal antenna, and the compact dimensions of antenna.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Have in figure: umbrella shape element radiates paster 1, feeding transmission line 2, the conduction band 3 of feeding transmission line, the ground 4 of feeding transmission line, medium substrate 5, trap reflector 6, microstrip transmission line 7, the input 8 of feeding transmission line, the load(ing) point 9 of trap reflector, the end 10 of feeding transmission line.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The technical solution adopted in the present invention is: the umbrella shape coplanar dipole antenna of trap reflector comprises two panels umbrella shape element radiates paster 1, feeding transmission line 2, medium substrate 5 and trap reflector 6; Umbrella shape element radiates paster 1, feeding transmission line 2 and trap reflector 6 are all on medium substrate 5; The shape of two panels umbrella shape element radiates paster 1 is rectangle, two panels umbrella shape element radiates paster 1 one-tenth umbrella shape is opened, its subtended angle is between 120 degree to 160 degree, two panels umbrella shape element radiates paster 1 is printed on the same face of medium substrate 5, a slice umbrella shape element radiates paster is directly connected with the conduction band 3 of feeding transmission line, and another sheet umbrella shape oscillator paster is connected at the end (10) of feeding transmission line with the ground 4 of the feeding transmission line of medium substrate 5 another side through metalized ground via hole; The microstrip transmission line 7 that trap reflector 6 is opened a way by two section terminations is formed, the conduction band of microstrip transmission line 7 and be printed on the two sides of medium substrate 5; Trap reflector load(ing) point 9 is between the input 8 and end 10 of feeding transmission line 2; At trap reflector load(ing) point 9, the microstrip transmission line 7 one-tenth symmetry shape of two section termination open circuits is placed in the both sides of feeding transmission line 2 respectively, its direction of extension is vertical with the direction of feeding transmission line 2, and the conduction band of microstrip transmission line 7 is connected with ground 4 with the conduction band 3 of feeding transmission line 2 respectively with ground.The width on the ground 4 of feeding transmission line 2 is the widest at input 8, then narrows gradually, between input 8 and the load(ing) point 9 of trap reflector, becomes the width the same with the conduction band 3 of feeding transmission line 2.The length of two sections of microstrip transmission lines 7 of trap reflector 6 is equal, and its length is about 1/4th of trap wavelength, to realize the radiation of suppressing antenna in a certain trap frequency range.The length of every section of microstrip transmission line 7 of trap reflector 6 is longer than the length of umbrella shape element radiates paster 1, to realize the effect of reflector; And spacing between the load(ing) point 9 of trap reflector and the end 10 of feeding transmission line be about carry out near 1/4th operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
In the trap frequency range lower than operating frequency, due to two sections of microstrip transmission line open-end of trap reflector, and the length of every section is about 1/4th of trap wavelength, therefore the load(ing) point of trap reflector on feeding transmission line, look in direction to every section of microstrip transmission line, its input impedance is zero, and after being in parallel with the input impedance of antenna umbrella shape element radiates paster, input impedance total is herein zero.Now load the transmission line that trap reflector umbrella shape element antenna is equivalent to terminal short circuit, therefore the input signal of antenna will be totally reflected, thus inhibit the aerial radiation of this frequency range, form trap characteristic.In Antenna Operation frequency range, every section of microstrip transmission line length of trap reflector is greater than 1/4th operation wavelengths, is namely greater than the length of the umbrella shape element radiates paster of antenna, can act as reflector.
For ensureing trap characteristic and reflection characteristic simultaneously, the length of trap reflector is greater than the length of antenna umbrella shape element radiates paster, therefore trap frequency will lower than operating frequency of antenna, and the size of trap frequency regulates by regulating the length of trap reflector every section of microstrip transmission line simultaneously.As reflector, the gain raising size that the microstrip transmission line of loading provides regulates by regulating the distance between antenna umbrella shape element radiates paster, and in theory when distance is therebetween about quarter-wave, antenna gain will obtain maximum raising.
Structurally, the umbrella shape coplanar dipole antenna of this trap reflector is made up of umbrella shape element radiates paster 1, feeding transmission line 2, medium substrate 5 and trap reflector 6, wherein the conduction band 3 of feeding transmission line 2 and ground 4 are printed on the two sides of medium substrate 5 respectively, two panels umbrella shape element radiates paster 1 is printed on the same face of medium substrate 5, a slice umbrella shape element radiates paster is directly connected with the conduction band 3 of feeding transmission line, and another sheet umbrella shape oscillator paster is connected at the end 10 of feeding transmission line with the ground 4 of the feeding transmission line of medium substrate 5 another side through metalized ground via hole; Trap reflector 6 is placed between the input 8 of feeding transmission line and end 10, be made up of the microstrip transmission line 7 of the equal open-end of two segment length at the load(ing) point 9 of trap reflector, the conduction band of every section of microstrip transmission line 7 and ground are printed on the two sides of medium substrate 5 respectively, and are connected with ground 4 with the conduction band 3 of feeding transmission line 2 respectively.The width of the conduction band 3 of two-wire-microstrip-fed transmission line all remains unchanged in two-wire line part and microstrip transmission line part.The width on the ground 4 of feeding transmission line is wider at the input 8 of feeding transmission line, makes input be microstrip line, is conveniently connected with feeding coaxial lines; Between the load(ing) point 9 and the end 10 of feeding transmission line of trap reflector, the width on the ground 4 of feeding transmission line is consistent with the width of conduction band 3, forms two-wire line, conveniently carries out feed to umbrella shape element radiates paster 1.Between the input 8 of feeding transmission line and the load(ing) point 9 of trap reflector, the width on ground 4 can linearly or arc gradual change.The shape of two panels umbrella shape element radiates paster 1 can be shape of rectangular ribbon, or the shape such as shape of rectangular ribbon of band toothed edge.The length of length more every sheet umbrella shape element radiates paster 1 of every section of microstrip transmission line 7 of trap reflector 6 will be grown, and makes trap reflector 6 can as reflector at the working frequency range of antenna; Its length is by the frequency of trap frequency range simultaneously, is about 1/4th of trap frequency corresponding wavelength.
In manufacture, the manufacturing process of the umbrella shape coplanar dipole antenna of this trap reflector can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.The umbrella shape coplanar dipole antenna of this trap reflector is made up of umbrella shape element radiates paster 1, feeding transmission line 2, medium substrate 5 and trap reflector 6, wherein umbrella shape element radiates paster 1, feeding transmission line 2 conduction band 3 and ground 4 and trap reflector 6 every section of microstrip transmission line 7 conduction band and ground, all be made up of the conductor material that electric conductivity is good, be printed on medium substrate 5.Medium substrate 5 wants the alap dielectric material of service wear.Two panels umbrella shape element radiates paster 1 is printed on the same face of medium substrate 5, a slice umbrella shape element radiates paster is directly connected with the conduction band 3 of feeding transmission line, another sheet umbrella shape oscillator paster is connected, so that carry out feed by two-wire-microstrip transmission line at the end (10) of feeding transmission line with the ground 4 of the feeding transmission line of medium substrate 5 another side through metalized ground via hole.The conduction band of every section of microstrip transmission line 7 of trap reflector 6 and ground are also printed on the two sides of medium substrate 5, are connected respectively with the conduction band 3 of feeding transmission line 2 with ground 4 at the load(ing) point 9 of trap reflector.
According to the above, just the present invention can be realized.
Claims (4)
1. a umbrella shape coplanar dipole antenna for trap reflector, is characterized in that the umbrella shape coplanar dipole antenna of this trap reflector comprises two panels umbrella shape element radiates paster (1), feeding transmission line (2), medium substrate (5) and trap reflector (6); Umbrella shape element radiates paster (1), feeding transmission line (2) and trap reflector (6) are all on medium substrate (5); The shape of two panels umbrella shape element radiates paster (1) is rectangle, two panels umbrella shape element radiates paster (1) becomes that umbrella shape is opened, its subtended angle is between 120 degree to 160 degree, two panels umbrella shape element radiates paster (1) is printed on the same face of medium substrate (5), a slice umbrella shape element radiates paster is directly connected with the conduction band (3) of feeding transmission line, and another sheet umbrella shape oscillator paster is connected at the end (10) of feeding transmission line with the ground (4) of the feeding transmission line of medium substrate (5) another side through metalized ground via hole; The microstrip transmission line (7) that trap reflector (6) is opened a way by two section terminations is formed, and the conduction band of microstrip transmission line (7) and ground are printed on the two sides of medium substrate (5) respectively; Trap reflector load(ing) point (9) is positioned between the input (8) of feeding transmission line (2) and end (10); At trap reflector load(ing) point (9), the microstrip transmission line (7) of two section termination open circuits becomes symmetry shape to be placed in the both sides of feeding transmission line (2) respectively, its direction of extension is vertical with the direction of feeding transmission line (2), and the conduction band of microstrip transmission line (7) is connected with ground (4) with the conduction band (3) of feeding transmission line (2) respectively with ground.
2. the umbrella shape coplanar dipole antenna of trap reflector according to claim 1, it is characterized in that the width on the ground (4) of described feeding transmission line (2) is the widest at input (8), then narrow gradually, between input (8) and the load(ing) point (9) of trap reflector, become the width the same with the conduction band of feeding transmission line (2) (3).
3. the umbrella shape coplanar dipole antenna of trap reflector according to claim 1, it is characterized in that the length of two sections of microstrip transmission lines (7) of described trap reflector (6) is equal, and its length is about 1/4th of trap wavelength, to realize the radiation of suppressing antenna in a certain trap frequency range.
4. the umbrella shape coplanar dipole antenna of trap reflector according to claim 1, it is characterized in that the length of every section of microstrip transmission line (7) of described trap reflector (6) will be grown than the length of umbrella shape element radiates paster (1), to realize the effect of reflector; And spacing between the end (10) of the load(ing) point of trap reflector (9) and feeding transmission line be about carry out near 1/4th operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522004.6A CN104300218A (en) | 2014-09-30 | 2014-09-30 | Umbrella-shaped coplanar dipole antenna of trapped-wave reflector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410522004.6A CN104300218A (en) | 2014-09-30 | 2014-09-30 | Umbrella-shaped coplanar dipole antenna of trapped-wave reflector |
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| CN201410522004.6A Pending CN104300218A (en) | 2014-09-30 | 2014-09-30 | Umbrella-shaped coplanar dipole antenna of trapped-wave reflector |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074214A (en) * | 1976-09-20 | 1978-02-14 | Motorola, Inc. | Microwave filter |
| JPH0537226A (en) * | 1991-07-31 | 1993-02-12 | Mitsubishi Electric Corp | Print dipole antenna |
| JPH11168323A (en) * | 1997-12-04 | 1999-06-22 | Mitsubishi Electric Corp | Multi-frequency antenna device and multi-frequency array antenna device using multi-frequency sharing antenna |
| CN1457150A (en) * | 2002-05-06 | 2003-11-19 | 三星电子株式会社 | Image inhibiting antenna |
| JP2009200719A (en) * | 2008-02-20 | 2009-09-03 | National Institutes Of Natural Sciences | Plane microwave antenna, one-dimensional microwave antenna and two-dimensional microwave antenna array |
-
2014
- 2014-09-30 CN CN201410522004.6A patent/CN104300218A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074214A (en) * | 1976-09-20 | 1978-02-14 | Motorola, Inc. | Microwave filter |
| JPH0537226A (en) * | 1991-07-31 | 1993-02-12 | Mitsubishi Electric Corp | Print dipole antenna |
| JPH11168323A (en) * | 1997-12-04 | 1999-06-22 | Mitsubishi Electric Corp | Multi-frequency antenna device and multi-frequency array antenna device using multi-frequency sharing antenna |
| CN1457150A (en) * | 2002-05-06 | 2003-11-19 | 三星电子株式会社 | Image inhibiting antenna |
| JP2009200719A (en) * | 2008-02-20 | 2009-09-03 | National Institutes Of Natural Sciences | Plane microwave antenna, one-dimensional microwave antenna and two-dimensional microwave antenna array |
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Application publication date: 20150121 |
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