CN104269632A - Planar coplanar bowtie antenna with notch reflector - Google Patents
Planar coplanar bowtie antenna with notch reflector Download PDFInfo
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- CN104269632A CN104269632A CN201410516713.3A CN201410516713A CN104269632A CN 104269632 A CN104269632 A CN 104269632A CN 201410516713 A CN201410516713 A CN 201410516713A CN 104269632 A CN104269632 A CN 104269632A
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Abstract
The invention relates to a planar coplanar bowtie antenna with a notch reflector. The planar coplanar bowtie antenna with the notch reflector is composed of two bowtie radiation patches (1), a feed transmission line (2), a dielectric substrate (5) and the notch reflector (6), wherein the two bowtie radiation patches are printed on the same face of the dielectric substrate (5), and each bowtie radiation patch is connected with the conduction band (3) and the ground (4) of the feed transmission line at the tail end (10) of the feed transmission line. The notch reflector (6) is composed of two open-ended double-wire transmission lines (7) which are identical in length. The conduction band and the ground of the each double-wire transmission line are connected with the conduction band (3) and the ground (4) of the feed transmission line respectively at a loading point (9) of the notch reflector. The notch reflector loaded by the planar coplanar bowtie antenna can be used as a reflector within the working frequency band of the antenna to increase the antenna gain, and meanwhile the notch reflector can be used as a filter within the notch frequency band lower than the working frequency band to restrain radiation of the antenna.
Description
Technical field
The present invention relates to a kind of antenna, especially a kind of co-planar Bow―tie 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.
Bow―tie 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 knot radiation 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 co-planar Bow―tie 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 co-planar Bow―tie antenna of trap reflector of the present invention comprises two panels knot radiation patch, feeding transmission line, medium substrate and trap reflector; Knot radiation patch, feeding transmission line and trap reflector are all on medium substrate; The shape of two panels knot radiation patch is triangle, two panels knot radiation patch is printed on the same face of medium substrate, a slice knot radiation patch is directly connected with the conduction band of feeding transmission line, and another sheet knot 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 two-wire line that trap reflector is opened a way by two section terminations is formed, and the conduction band of two-wire 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 two-wire 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 parallel with the direction that knot radiation patch stretches, and the conduction band of two-wire 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 two-wire 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 two-wire line of described trap reflector is longer than the length of knot radiation patch, 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 two-wire 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 two-wire 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 co-planar Bow―tie 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 two-wire lines of trap reflector will be greater than 1/4th operation wavelengths, thus be greater than the length of antenna knot radiation patch, therefore trap reflector can realize the characteristic of its reflector, and antenna gain is improved.
The length forming two sections of two-wire lines of trap reflector determines operating frequency corresponding to trap characteristic, and therefore, the length of adjustment two sections of two-wire lines, directly can regulate the trap frequency of trap reflector.
The operating frequency of Bow―tie antenna, is determined by the length of its knot radiation patch, and therefore, the length of adjustment knot radiation patch, directly can regulate the operating frequency of antenna.
Corresponding to the operating frequency of Bow―tie 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 co-planar Bow―tie 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: knot radiation patch 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, two-wire 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 co-planar Bow―tie antenna of trap reflector comprises two panels knot radiation patch 1, feeding transmission line 2, medium substrate 5 and trap reflector 6; Knot radiation patch 1, feeding transmission line 2 and trap reflector 6 are all on medium substrate 5; The shape of two panels knot radiation patch 1 is triangle, two panels knot radiation patch 1 is printed on the same face of medium substrate 5, a slice knot radiation patch is directly connected with the conduction band 3 of feeding transmission line, and another sheet knot 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 two-wire line 7 that trap reflector 6 is opened a way by two section terminations is formed, the conduction band of two-wire 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 two-wire 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 parallel with the direction that knot radiation patch 1 stretches, and the conduction band of two-wire 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 two-wire 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 two-wire line 7 of trap reflector 6 is longer than the length of knot radiation patch 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 two-wire 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 two-wire line, its input impedance is zero, and after being in parallel with the input impedance of antenna knot radiation patch, input impedance total is herein zero.Now load the transmission line that trap reflector Bow―tie 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 Double wire transmission line length of trap reflector is greater than 1/4th operation wavelengths, is namely greater than the length of the knot radiation patch 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 knot radiation patch, 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 two-wire line simultaneously.As reflector, the gain raising size that the two-wire line of loading provides regulates by regulating the distance between antenna knot radiation patch, and in theory when distance is therebetween about quarter-wave, antenna gain will obtain maximum raising.
Structurally, the co-planar Bow―tie antenna of this trap reflector is made up of knot radiation patch 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 knot radiation patch 1 is printed on the same face of medium substrate 5, a slice knot radiation patch is directly connected with the conduction band 3 of feeding transmission line, and another sheet knot 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 two-wire 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 two-wire 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 micro-band-dual feed transmission line all remains unchanged in microstrip transmission line part and two-wire 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 knot radiation patch 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 knot radiation patch 1 can be triangle strip, or the shape such as triangle strip of band toothed edge.The length of length more every sheet knot radiation patch 1 of every section of two-wire 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 co-planar Bow―tie antenna of this trap reflector can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.The co-planar Bow―tie antenna of this trap reflector is made up of knot radiation patch 1, feeding transmission line 2, medium substrate 5 and trap reflector 6, wherein knot radiation patch 1, feeding transmission line 2 conduction band 3 and ground 4 and trap reflector 6 every section of two-wire 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 knot radiation patch 1 is printed on the same face of medium substrate 5, a slice knot radiation patch is directly connected with the conduction band 3 of feeding transmission line, another sheet knot 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 micro-band-two-wire line.The conduction band of every section of two-wire 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 co-planar Bow―tie antenna for trap reflector, is characterized in that the co-planar Bow―tie antenna of this trap reflector comprises two panels knot radiation patch (1), feeding transmission line (2), medium substrate (5) and trap reflector (6); Knot radiation patch (1), feeding transmission line (2) and trap reflector (6) are all on medium substrate (5); The shape of two panels knot radiation patch (1) is triangle, two panels knot radiation patch (1) is printed on the same face of medium substrate (5), a slice knot radiation patch is directly connected with the conduction band (3) of feeding transmission line, and another sheet knot 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 two-wire line (7) that trap reflector (6) is opened a way by two section terminations is formed, and the conduction band of two-wire 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 two-wire 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 parallel with the direction that knot radiation patch (1) stretches, and the conduction band of two-wire line (7) is connected with ground (4) with the conduction band (3) of feeding transmission line (2) respectively with ground.
2. the co-planar Bow―tie 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 co-planar Bow―tie antenna of trap reflector according to claim 1, it is characterized in that the length of two sections of two-wire 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 co-planar Bow―tie antenna of trap reflector according to claim 1, is characterized in that the length of every section of two-wire line (7) of described trap reflector (6) will be grown than the length of knot radiation patch (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 |
|---|---|---|---|
| CN201410516713.3A CN104269632A (en) | 2014-09-30 | 2014-09-30 | Planar coplanar bowtie antenna with notch reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516713.3A CN104269632A (en) | 2014-09-30 | 2014-09-30 | Planar coplanar bowtie antenna with notch reflector |
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|---|---|
| CN104269632A true CN104269632A (en) | 2015-01-07 |
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| CN201410516713.3A Pending CN104269632A (en) | 2014-09-30 | 2014-09-30 | Planar coplanar bowtie antenna with notch reflector |
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Citations (6)
| 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 |
| CN102800951A (en) * | 2012-08-06 | 2012-11-28 | 哈尔滨工业大学 | Printed Yagi antenna of vibrator loading type balance microstrip line feed |
-
2014
- 2014-09-30 CN CN201410516713.3A patent/CN104269632A/en active Pending
Patent Citations (6)
| 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 |
| CN102800951A (en) * | 2012-08-06 | 2012-11-28 | 哈尔滨工业大学 | Printed Yagi antenna of vibrator loading type balance microstrip line feed |
Non-Patent Citations (1)
| Title |
|---|
| YUAN DING等: ""A Novel Dual-Band Printed Diversity Antenna for Mobile Terminals"", 《IEEE TRANSACIONS ANTENNAS AND PROPAGATION》 * |
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Application publication date: 20150107 |