CN104218314A - Broadband coplanar dipole antenna of wave trapping reflector - Google Patents
Broadband coplanar dipole antenna of wave trapping reflector Download PDFInfo
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- CN104218314A CN104218314A CN201410517452.7A CN201410517452A CN104218314A CN 104218314 A CN104218314 A CN 104218314A CN 201410517452 A CN201410517452 A CN 201410517452A CN 104218314 A CN104218314 A CN 104218314A
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Abstract
The invention relates to a broadband coplanar dipole antenna of a wave trapping reflector. The antenna is composed of oscillator radiation patches (1), a feed transmission line (2), a medium substrate (5) and a wave trapping reflector (6), wherein the two pieces of oscillator radiation patches are printed on the same side of the medium substrate, and connected to a conduction band (3) of the feed transmission line and the ground (4) respectively at tail end (10) of the transmission line. The wave trapping reflector (6) is composed of a left micro-strip open-circuit line (11) and a right micro-strip open-circuit line (12) which are terminal open-circuits with same length, the conduction band and the ground wire of the wave trapping reflector are respectively connected to the conduction band (3) of the feed transmission line and the ground (4) at a first loading point (9) and a second loading point (13) of the wave trapping reflector. The wave trapping reflector of the antenna can improve antenna gain within the working frequency band of the antenna, and meanwhile, also can be used as a filter within a wave trapping frequency band lower than the working frequency band for restraining radiation of the antenna.
Description
Technical field
The present invention relates to a kind of antenna, especially a kind of broadband plane dipole sub 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.
Dipole 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 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 broadband plane dipole sub antenna proposing a kind of trap reflector, the trap reflector of this antenna had both had the effect of broadband reflector, gain in Antenna Operation frequency range is improved, also there is trap characteristic simultaneously, the aerial radiation of certain frequency range lower than operating frequency of antenna is inhibited, and antenna structure is simple, size is less.
technical scheme:the broadband plane dipole sub antenna of trap reflector of the present invention comprises two panels element radiates paster, feeding transmission line, medium substrate and trap reflector; Element radiates paster, feeding transmission line and trap reflector are all on medium substrate; The shape of two panels element radiates paster is rectangle, two panels element radiates paster is printed on the same face of medium substrate, a slice element radiates paster is directly connected with the conduction band of feeding transmission line, and another sheet 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 equal by two segment length, the micro-band open-circuit line of the left side of open-end micro-band open-circuit line and the right forms is formed; The conduction band of microstrip transmission line and ground are printed on the two sides of medium substrate respectively, and the micro-band open-circuit line of the left side micro-band open-circuit line and the right is placed in the both sides of feeding transmission line respectively, and its direction of extension is parallel with the direction that element radiates paster stretches; First load(ing) point of trap reflector and the second load(ing) point of trap reflector are all between the input and the end of feeding transmission line of feeding transmission line, at the first load(ing) point of trap reflector, the conduction band of the micro-band open-circuit line in the left side is connected with the ground of feeding transmission line with the conduction band of feeding transmission line respectively with ground, at the second load(ing) point of trap reflector, the conduction band of the micro-band open-circuit line in the right is connected with the ground of feeding transmission line 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 the input of feeding transmission line, then narrows gradually, between the input and the first load(ing) point of trap reflector of feeding transmission line, becomes the width the same with the conduction band of feeding transmission line.
The length of the micro-band open-circuit line of the described left side micro-band open-circuit line and the right is 1/4th of trap band wavelength, to realize the radiation of suppressing antenna in trap frequency range
The length of the left side micro-band open-circuit line and the right micro-band open-circuit line of described microstrip transmission line is all long than the length of element radiates paster, to realize the effect of reflector; And spacing between the first load(ing) point of trap reflector and the end of feeding transmission line be about carry out near 1/4th maximum functional wavelength tuning, spacing between second load(ing) point of trap reflector and the end of feeding transmission line be about carry out near 1/4th minimum operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
In the trap frequency range lower than operating frequency of antenna, because the micro-band open-circuit line of the left side micro-band open-circuit line and the right is all open-end, and the length of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is 1/4th of trap band wavelength, therefore the first load(ing) point of trap reflector and the second load(ing) point on feeding transmission line, in trap frequency range, the input impedance of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is zero, therefore the first load(ing) point of trap reflector and the second load(ing) point place on feeding transmission line, total input impedance is zero.Therefore the broadband plane dipole sub 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 of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is all greater than 1/4th operation wavelengths, thus be greater than the length of antenna element radiates paster, therefore trap reflector can realize the characteristic of its reflector, and antenna gain is improved.
The length of the left side micro-band open-circuit line and the right micro-band open-circuit line determines operating frequency corresponding to trap characteristic, and therefore, the length of the adjustment left side micro-band open-circuit line and the micro-band open-circuit line in the right, can distinguish the trap frequency directly regulating trap reflector.
The operating frequency of dipole antenna, is determined by the length of its element radiates paster, and therefore, the length of adjustment element radiates paster, directly can regulate the operating frequency of antenna.
Corresponding to the working frequency range of dipole antenna, spacing between first load(ing) point of trap reflector and the end of feeding transmission line is approximately the quarter-wave of working frequency range low frequency end, spacing between second load(ing) point of trap reflector and the end of feeding transmission line is approximately the quarter-wave of working frequency range front end, like this with regard to the bandwidth of operation of broadening, the reflector performance that simultaneously can realize in wider frequency band and matching performance.
beneficial effect:the invention has the beneficial effects as follows, the broadband plane dipole sub antenna of the trap reflector proposed, its trap reflector can as reflector in the working frequency range that antenna is wider, 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: 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, first load(ing) point 9 of trap reflector, the end 10 of feeding transmission line, the micro-band open-circuit line 11 in the left side, the micro-band open-circuit line 12 in the right, the second load(ing) point 13 of trap reflector.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The technical solution adopted in the present invention is: the broadband plane dipole sub antenna of trap reflector comprises two panels element radiates paster 1, feeding transmission line 2, medium substrate 5 and trap reflector 6; Element radiates paster 1, feeding transmission line 2 and trap reflector 6 are all on medium substrate 5; The shape of two panels element radiates paster 1 is rectangle, two panels element radiates paster 1 is printed on the same face of medium substrate 5, a slice element radiates paster is directly connected with the conduction band 3 of feeding transmission line, and another sheet 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 equal by two segment length, the micro-band open-circuit line 12 of the left side of open-end micro-band open-circuit line 11 and the right forms is formed; The conduction band of microstrip transmission line 7 and be printed on the two sides of medium substrate 5, the micro-band open-circuit line 12 of the left side micro-band open-circuit line 11 and the right is placed in the both sides of feeding transmission line 2 respectively, and its direction of extension is parallel with the direction that element radiates paster 1 stretches; First load(ing) point 9 of trap reflector and the second load(ing) point 13 of trap reflector are all between the input 8 and the end 10 of feeding transmission line of feeding transmission line 2, at the first load(ing) point 9 of trap reflector, the conduction band of the micro-band open-circuit line 11 in the left side is connected with the ground 4 of feeding transmission line with the conduction band 3 of feeding transmission line 2 respectively with ground, at the second load(ing) point 13 of trap reflector, the conduction band of the micro-band open-circuit line 12 in the right is connected with the ground 4 of feeding transmission line 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 the input 8 of feeding transmission line 2, then narrows gradually, between the input 8 and the first load(ing) point 9 of trap reflector of feeding transmission line 2, becomes the width the same with the conduction band 3 of feeding transmission line 2.The length of the micro-band open-circuit line 12 of the left side micro-band open-circuit line 11 and the right is 1/4th of trap band wavelength, to realize the radiation of suppressing antenna in trap frequency range.The left side micro-band open-circuit line 11 of microstrip transmission line 7 and the length of the right micro-band open-circuit line 12 longer than the length of element radiates paster 1, to realize the effect of reflector; And spacing between the first load(ing) point 9 of trap reflector and the end 10 of feeding transmission line be about carry out near 1/4th maximum functional wavelength tuning, spacing between second load(ing) point (13) of trap reflector and the end (10) of feeding transmission line be about carry out near 1/4th minimum operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
In the trap frequency range lower than operating frequency of antenna, because the micro-band open-circuit line of the left side micro-band open-circuit line and the right is all open-end, and the length of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is 1/4th of trap band wavelength, therefore the first load(ing) point 9 and the second load(ing) point 13 of trap reflector on feeding transmission line, in trap frequency range, the input impedance of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is respectively zero, therefore the load(ing) point place of trap reflector on feeding transmission line, total input impedance is zero.Therefore the broadband plane dipole sub 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 of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is all greater than 1/4th operation wavelengths, thus be greater than the length of antenna element radiates paster, therefore trap reflector can realize the characteristic of its reflector, antenna gain is improved, by the distance between adjustment trap reflector and element radiates paster, optimal antenna gain can be obtained.
For ensureing trap characteristic and reflection characteristic simultaneously, the length of the micro-band open-circuit line of the left side micro-band open-circuit line and the right is all greater than the length of antenna 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 the trap reflector left side micro-band open-circuit line and the micro-band open-circuit line in the right simultaneously.
Corresponding to the working frequency range of dipole antenna, spacing between first load(ing) point of trap reflector and the end of feeding transmission line is approximately the quarter-wave of working frequency range low frequency end, spacing between second load(ing) point of trap reflector and the end of feeding transmission line is approximately the quarter-wave of working frequency range front end, like this with regard to the bandwidth of operation of broadening, the reflector performance that simultaneously can realize in wider frequency band and matching performance.
Structurally, the width of the conduction band 3 of the feeding transmission line of the broadband plane dipole sub antenna of this trap reflector 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 first 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 element radiates paster 1.Between the input 8 of feeding transmission line and the first load(ing) point 9 of trap reflector, the width on ground 4 can linearly or arc gradual change.The shape of two panels element radiates paster 1 can be shape of rectangular ribbon, or the shape such as shape of rectangular ribbon of band toothed edge.
In manufacture, the manufacturing process of the broadband plane dipole sub antenna of this trap reflector can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.The broadband plane dipole sub antenna of this trap reflector is made up of element radiates paster 1, feeding transmission line 2, medium substrate 5 and trap reflector 6, wherein element radiates paster 1, feeding transmission line 2 conduction band 3 and ground 4 and trap reflector 6 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 element radiates paster 1 is printed on the same face of medium substrate 5, a slice element radiates paster is directly connected with the conduction band 3 of feeding transmission line, another sheet 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, so that carry out feed by two-wire-microstrip-fed transmission line.The conduction band of the micro-band open-circuit line 12 of the left side micro-band open-circuit line 11 and the right of the 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 first load(ing) point 9 of trap reflector with the second load(ing) point 13.
According to the above, just the present invention can be realized.
Claims (4)
1. a broadband plane dipole sub antenna for trap reflector, is characterized in that the broadband plane dipole sub antenna of this trap reflector comprises two panels element radiates paster (1), feeding transmission line (2), medium substrate (5) and trap reflector (6), element radiates paster (1), feeding transmission line (2) and trap reflector (6) are all on medium substrate (5), the shape of two panels element radiates paster (1) is rectangle, two panels element radiates paster (1) is printed on the same face of medium substrate (5), a slice element radiates paster is directly connected with the conduction band (3) of feeding transmission line, and another sheet 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 the micro-band open-circuit line (12) of trap reflector (6) left side that is equal by two segment length, open-end micro-band open-circuit line (11) and the right forms is formed, the conduction band of microstrip transmission line (7) and ground are printed on the two sides of medium substrate (5) respectively, the micro-band open-circuit line (12) in the left side micro-band open-circuit line (11) and the right is placed in the both sides of feeding transmission line (2) respectively, and its direction of extension is parallel with the direction that element radiates paster (1) stretches, first load(ing) point (9) of trap reflector and second load(ing) point (13) of trap reflector are all positioned between the input (8) of feeding transmission line (2) and the end (10) of feeding transmission line, at first load(ing) point (9) of trap reflector, the conduction band of the micro-band open-circuit line (11) in the left side is connected with the ground (4) of feeding transmission line with the conduction band (3) of feeding transmission line (2) respectively with ground, at second load(ing) point (13) of trap reflector, the conduction band of the micro-band open-circuit line (12) in the right is connected with the ground (4) of feeding transmission line with the conduction band (3) of feeding transmission line (2) respectively with ground.
2. the broadband plane dipole sub 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 the input (8) of feeding transmission line (2), then narrow gradually, between the input (8) and first load(ing) point (9) of trap reflector of feeding transmission line (2), become the width the same with the conduction band of feeding transmission line (2) (3).
3. the broadband plane dipole sub antenna of trap reflector according to claim 1, it is characterized in that the length of the micro-band open-circuit line (12) in the described left side micro-band open-circuit line (11) and the right is 1/4th of trap band wavelength, to realize the radiation of suppressing antenna in trap frequency range.
4. the broadband plane dipole sub antenna of trap reflector according to claim 1, it is characterized in that the length of the micro-band open-circuit line (12) in the left side micro-band open-circuit line (11) and the right of described microstrip transmission line (7) all will be grown than the length of element radiates paster (1), to realize the effect of reflector; And spacing between first load(ing) point (9) of trap reflector and the end (10) of feeding transmission line be about carry out near 1/4th maximum functional wavelength tuning, spacing between second load(ing) point (13) of trap reflector and the end (10) of feeding transmission line be about carry out near 1/4th minimum operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
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| CN201410517452.7A CN104218314A (en) | 2014-09-30 | 2014-09-30 | Broadband coplanar dipole antenna of wave trapping reflector |
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| CN201410517452.7A CN104218314A (en) | 2014-09-30 | 2014-09-30 | Broadband coplanar dipole antenna of wave trapping reflector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111771305A (en) * | 2018-04-05 | 2020-10-13 | 华为技术有限公司 | Antenna arrangement with wave trap and user equipment |
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Application publication date: 20141217 |