CN104300221A - Umbrella coplanar dipole antenna with double-frequency notch reflector - Google Patents
Umbrella coplanar dipole antenna with double-frequency notch reflector Download PDFInfo
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- CN104300221A CN104300221A CN201410523149.8A CN201410523149A CN104300221A CN 104300221 A CN104300221 A CN 104300221A CN 201410523149 A CN201410523149 A CN 201410523149A CN 104300221 A CN104300221 A CN 104300221A
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Abstract
The invention relates to an umbrella coplanar dipole antenna with a double-frequency notch reflector. The antenna is composed of umbrella oscillator radiation patches (1), a feed transmission line (2), a dielectric substrate (5) and the notch reflector (6), wherein the two umbrella oscillator radiation patches are printed on the same surface of the dielectric substrate (5) in an umbrella shape and are connected with a conduction band (3) of the feed transmission line and a ground (4) of the feed transmission line at a transmission line tail end (10) respectively. The notch reflector (6) is composed of a left micro-strip open circuit line (11) and a right micro-strip open circuit line (12), wherein the left micro-strip open circuit line (11) and the right micro-strip open circuit line (12) are unequal in length and are opened at the tail ends, conduction bands and grounds of the two micro-strip open circuit lines are connected with the conduction band (3) of the feed transmission line at the loading point (9) of the notch reflector respectively. The notch reflector loaded by the antenna can be used as a reflector within the working frequency band of the antenna, and therefore the gain of the antenna can be increased; meanwhile, the notch reflector can be used as a filter within two notch frequency bands lower than the working frequency band, and therefore radiation of the antenna can be restrained.
Description
Technical field
The present invention relates to a kind of antenna, especially a kind of umbrella shape coplanar dipole antenna of double frequency 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 double frequency 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 certain two 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 double frequency 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 through the ground of metalized ground via hole with the feeding transmission line of medium substrate (5) another side; The microstrip transmission line that trap reflector is not waited by two segment length, the micro-band open-circuit line of the left side micro-band open-circuit line and the right of open-end 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 vertical with the direction of feeding transmission line; The load(ing) point of trap reflector is between the input and the end of feeding transmission line of feeding transmission line, and at trap reflector load(ing) point, the conduction band of microstrip transmission line 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 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 in the described left side is about 1/4th of the first trap band wavelength, and the length of the micro-band open-circuit line in the right is about 1/4th of the second trap band wavelength, to realize the radiation of suppressing antenna in two trap frequency ranges.
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 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 two trap frequency ranges 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 left side micro-band open-circuit line is about 1/4th of the first trap band wavelength, the length of the micro-band open-circuit line in the right is about 1/4th of the second trap band wavelength, therefore the load(ing) point of trap reflector on feeding transmission line, in two trap frequency ranges, 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 umbrella shape coplanar dipole antenna of double frequency trap reflector is equivalent to the transmission line of terminal short circuit two trap frequency ranges, 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 these two frequency ranges, 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 umbrella shape 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 difference left side micro-band open-circuit line and the micro-band open-circuit line in the right, can distinguish two trap frequencies directly regulating 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 double frequency 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 two trap in-band signals 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, the micro-band open-circuit line 11 in the left side, the micro-band open-circuit line 12 in the right.
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 double frequency 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 not waited by two segment length, the micro-band open-circuit line 12 of the left side micro-band open-circuit line 11 and the right of open-end 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 vertical with the direction of feeding transmission line; The load(ing) point 9 of trap reflector is between the input 8 and the end 10 of feeding transmission line of feeding transmission line 2, and at trap reflector load(ing) point 9, the conduction band of microstrip transmission line 7 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 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 11 in the left side is about 1/4th of the first trap band wavelength, and the length of the micro-band open-circuit line 12 in the right is about 1/4th of the second trap band wavelength, to realize the radiation of suppressing antenna in two trap frequency ranges.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 all long 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 two trap frequency ranges 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 left side micro-band open-circuit line is about 1/4th of the first trap band wavelength, the length of the micro-band open-circuit line in the right is about 1/4th of the second trap band wavelength, therefore the load(ing) point of trap reflector on feeding transmission line, in two trap frequency ranges, 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 umbrella shape coplanar dipole antenna of double frequency trap reflector is equivalent to the transmission line of terminal short circuit two trap frequency ranges, 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 these two frequency ranges, 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 umbrella shape 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 umbrella shape 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 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 the trap reflector left side micro-band open-circuit line and the micro-band open-circuit line in the right simultaneously.
Structurally, the width of the conduction band 3 of the feeding transmission line of the umbrella shape coplanar dipole antenna of this double frequency 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 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.
In manufacture, the manufacturing process of the umbrella shape coplanar dipole antenna of this double frequency trap reflector can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.The umbrella shape coplanar dipole antenna of this double frequency 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, 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; So that carry out feed by two-wire-microstrip 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 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 double frequency trap reflector, is characterized in that the umbrella shape coplanar dipole antenna of this double frequency 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 not waited by two segment length, the micro-band open-circuit line (12) in the left side micro-band open-circuit line (11) and the right of open-end 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 vertical with the direction of feeding transmission line (2); The load(ing) point (9) of trap reflector is positioned between the input (8) of feeding transmission line (2) and the end (10) of feeding transmission line, at trap reflector load(ing) point (9), the conduction band of microstrip transmission line (7) 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 umbrella shape coplanar dipole antenna of double frequency 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 the 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 umbrella shape coplanar dipole antenna of double frequency trap reflector according to claim 1, it is characterized in that the length of the micro-band open-circuit line (11) in the described left side is about 1/4th of the first trap band wavelength, the length of the micro-band open-circuit line (12) in the right is about 1/4th of the second trap band wavelength, to realize the radiation of suppressing antenna in two trap frequency ranges.
4. the umbrella shape coplanar dipole antenna of double frequency 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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410523149.8A CN104300221A (en) | 2014-09-30 | 2014-09-30 | Umbrella coplanar dipole antenna with double-frequency notch reflector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410523149.8A CN104300221A (en) | 2014-09-30 | 2014-09-30 | Umbrella coplanar dipole antenna with double-frequency notch reflector |
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| CN104300221A true CN104300221A (en) | 2015-01-21 |
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| CN201410523149.8A Pending CN104300221A (en) | 2014-09-30 | 2014-09-30 | Umbrella coplanar dipole antenna with double-frequency notch reflector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 CN201410523149.8A patent/CN104300221A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |