CN104218312A - Broadband bow-tie antenna for dual-band wave trapping reflector - Google Patents
Broadband bow-tie antenna for dual-band wave trapping reflector Download PDFInfo
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- CN104218312A CN104218312A CN201410516252.XA CN201410516252A CN104218312A CN 104218312 A CN104218312 A CN 104218312A CN 201410516252 A CN201410516252 A CN 201410516252A CN 104218312 A CN104218312 A CN 104218312A
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Abstract
The invention relates to a broadband bow-tie antenna for a dual-band wave trapping reflector. The antenna is composed of bow-tie radiation patches (1), a feed transmission line (2), a medium substrate (5) and a wave trapping reflector (6), wherein the two pieces of bow-tie radiation patches are pairwise printed on the two sides of the medium substrate, and respectively connected to a conduction band (3) of the feed transmission line and the ground (4) 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 different 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 two wave trapping frequency bands 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 Bow―tie antenna of double frequency trap reflector, belongs to the technical field that antenna is manufactured.
Background technology
Antenna is as front end device important in wireless communication system, not only can radiation or receive useful radiofrequency signal, and for other useless or unwanted signals that drop 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 receiving-sending system, and the image frequency signal for example existing in superheterodyne receiver disturbs.Superhet structure 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 is for to insert mirror filter in radio circuit, thereby filters out the image frequency signal receiving in signal.The performance that this has reduced system to a certain extent, has increased the weight of the burden of system, has increased cost demand 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 that address this problem.
Bow―tie antenna is as a kind of microstrip antenna, possessed the low section of microstrip antenna, low cost, volume little, lightweight, easily with the advantage such as circuit board is integrated, knot radiation patch size is less simultaneously, applies very extensive in modern wireless communication systems.But its gain is lower, is not suitable for the occasion that some gain requirements is high.
Summary of the invention
technical problem:the present invention seeks to propose a kind of broadband Bow―tie antenna of double frequency trap reflector, the trap reflector of this antenna had both had the effect of broadband reflector, gain in antenna working frequency range is improved, also there is trap characteristic simultaneously, make to be inhibited lower than the aerial radiation of certain two frequency range of operating frequency of antenna, and antenna structure is simple, size is less.
technical scheme:the broadband Bow―tie antenna of double frequency trap reflector of the present invention comprises two knot radiation patch, feed transmission line, medium substrate and trap reflector; Knot radiation patch, feed transmission line and trap reflector are all on medium substrate; The shape of two knot radiation patch is triangles, and two knot radiation patch become anti-pode shape to be printed on the two sides of medium substrate, are connected respectively with the conduction band of feed transmission line and the ground of feed transmission line at the end of feed transmission line; Trap reflector forms with the micro-microstrip transmission line forming with open-circuit line of open-circuit line and the right by the two segment length left side that grade, terminal are not opened a way is micro-; The conduction band of microstrip transmission line and ground are printed on respectively the two sides of medium substrate, and the left side is micro-with the micro-both sides that are placed in respectively feed transmission line with open-circuit line of open-circuit line and the right, and its direction of extension is parallel with the direction that knot radiation patch stretches; The first load(ing) point of trap reflector and the second load(ing) point of trap reflector are all between the input of feed transmission line and the end of feed transmission line, at the first load(ing) point of trap reflector, the micro-conduction band with open-circuit line in the left side is connected with the ground of feed transmission line with the conduction band of feed transmission line respectively with ground, at the second load(ing) point of trap reflector, the micro-conduction band with open-circuit line in the right is connected with the ground of feed transmission line with the conduction band of feed transmission line respectively with ground.
The width on the ground of described feed transmission line is the widest at the input of feed transmission line, then narrows gradually, between the input of feed transmission line and the first load(ing) point of trap reflector, becomes the width the same with the conduction band of feed transmission line.
The micro-length with open-circuit line in the described left side is about 1/4th of the first trap band wavelength, and the micro-length with 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 left side of described microstrip transmission line is micro-all long than the length of knot radiation patch with the micro-length with open-circuit line of open-circuit line and the right, to realize the effect of reflector; And the spacing between the first load(ing) point of trap reflector and the end of feed transmission line be about carry out near 1/4th maximum functional wavelength tuning, spacing between the second load(ing) point of trap reflector and the end of feed transmission line be about carry out near 1/4th minimum 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 micro-band open-circuit line in the left side and the right is all terminal open circuits, and the micro-length with open-circuit line in the left side is about 1/4th of the first trap band wavelength, the micro-length with open-circuit line in the right is about 1/4th of the second trap band wavelength, therefore the first load(ing) point of trap reflector and the second load(ing) point on feed transmission line, in two trap frequency ranges, the left side is micro-is respectively zero with the micro-input impedance with open-circuit line of open-circuit line and the right, therefore the first load(ing) point of trap reflector and the second load(ing) point place on feed transmission line, total input impedance is respectively zero.Therefore the broadband Bow―tie antenna of double frequency trap reflector is equivalent to the transmission line of terminal short circuit two trap frequency ranges, the input signal of antenna is fed back into end by the total reflection of trap reflector on feed transmission line, thereby suppress the aerial radiation of these two frequency ranges, formed trap characteristic.At the working frequency range of antenna, the left side is micro-is all greater than 1/4th operation wavelengths with the micro-length with open-circuit line of open-circuit line and the right, thereby be greater than the length of antenna knot radiation patch, therefore trap reflector can be realized the characteristic of its reflector, and antenna gain is improved.
The left side is micro-has determined with the micro-length with open-circuit line of open-circuit line and the right the operating frequency that trap characteristic is corresponding, therefore, adjusts the left side micro-with the micro-length with open-circuit line of open-circuit line and the right, can directly regulate respectively two trap frequencies of trap reflector.
The operating frequency of Bow―tie antenna, is determined by the length of its knot radiation patch, therefore, adjusts the length of knot radiation patch, can directly regulate the operating frequency of antenna.
Corresponding to the working frequency range of Bow―tie antenna, spacing between the first load(ing) point of trap reflector and the end of feed transmission line is approximately the quarter-wave of working frequency range low frequency end, spacing between the second load(ing) point of trap reflector and the end of feed transmission line is approximately the quarter-wave of working frequency range front end, like this with regard to the bandwidth of operation of broadening, reflector performance and the matching performance that can in wider frequency band, realize simultaneously.
beneficial effect:the invention has the beneficial effects as follows, the broadband Bow―tie antenna of the double frequency trap reflector proposing, its trap reflector can be as reflector in the wider working frequency range of antenna, improve the gain of antenna, trap reflector also has trap effect simultaneously, can the interference of two trap in-band signals of filtering to antenna, obtain stronger inhibition in the gain of trap frequency range internal antenna, and the compact dimensions of antenna.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure, have: knot radiation patch 1, feed transmission line 2, the conduction band 3 of feed transmission line, the ground 4 of feed transmission line, medium substrate 5, trap reflector 6, microstrip transmission line 7, the input 8 of feed transmission line, the first load(ing) point 9 of trap reflector, the end 10 of feed 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 Bow―tie antenna of double frequency trap reflector comprises two knot radiation patch 1, feed transmission line 2, medium substrate 5 and trap reflector 6; Knot radiation patch 1, feed transmission line 2 and trap reflector 6 are all on medium substrate 5; The shape of two knot radiation patch 1 is triangle, and 1 one-tenth anti-pode shape of two knot radiation patch is printed on the two sides of medium substrate 5, is connected respectively with the conduction band 3 of feed transmission line and the ground 4 of feed transmission line at the end 10 of feed transmission line; Trap reflector 6 forms with the micro-microstrip transmission line forming with open-circuit line 12 7 of open-circuit line 11 and the right by the two segment length left side that grade, terminal are not opened a way is micro-; The conduction band of microstrip transmission line 7 and be printed on the two sides of medium substrate 5, the left side is micro-with the micro-both sides that are placed in respectively feed transmission line 2 with open-circuit line 12 of open-circuit line 11 and the right, its direction of extension is parallel with the direction that knot radiation patch 1 stretches; The first load(ing) point 9 of trap reflector and the second load(ing) point 13 of trap reflector are all between the input 8 of feed transmission line 2 and the end 10 of feed transmission line, at the first load(ing) point 9 of trap reflector, the micro-conduction band with open-circuit line 11 in the left side is connected with the conduction band 3 of feed transmission line 2 and the ground 4 of feed transmission line respectively with ground, at the second load(ing) point 13 of trap reflector, the micro-conduction band with open-circuit line 12 in the right is connected with the conduction band 3 of feed transmission line 2 and the ground 4 of feed transmission line respectively with ground.The width on the ground 4 of feed transmission line 2 is the widest at the input 8 of feed transmission line 2, then narrows gradually, between the input 8 of feed transmission line 2 and the first load(ing) point 9 of trap reflector, becomes the width the same with the conduction band 3 of feed transmission line 2.The micro-length with open-circuit line 11 in the left side is about 1/4th of the first trap band wavelength, and the micro-length with 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 of microstrip transmission line 7 is micro-all long than the length of knot radiation patch 1 with the micro-length with open-circuit line 12 of open-circuit line 11 and the right, to realize the effect of reflector; And the spacing between the first load(ing) point 9 and the end 10 of feed transmission line of trap reflector be about carry out near 1/4th maximum functional wavelength tuning, spacing between the second load(ing) point 13 and the end 10 of feed transmission line of trap reflector be about carry out near 1/4th minimum 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 micro-band open-circuit line in the left side and the right is all terminal open circuits, and the micro-length with open-circuit line in the left side is about 1/4th of the first trap band wavelength, the micro-length with open-circuit line in the right is about 1/4th of the second trap band wavelength, therefore the first load(ing) point 9 of trap reflector and the second load(ing) point 13 on feed transmission line, in two trap frequency ranges, the left side is micro-is respectively zero with the micro-input impedance with open-circuit line of open-circuit line and the right, therefore the first load(ing) point 9 of trap reflector and the second load(ing) point 13 places on feed transmission line, total input impedance is zero.Therefore the broadband Bow―tie antenna of double frequency trap reflector is equivalent to the transmission line of terminal short circuit two trap frequency ranges, the input signal of antenna is fed back into end by the total reflection of trap reflector on feed transmission line, thereby suppress the aerial radiation of these two frequency ranges, formed trap characteristic.At the working frequency range of antenna, the left side is micro-is all greater than 1/4th operation wavelengths with the micro-length with open-circuit line of open-circuit line and the right, thereby be greater than the length of antenna knot radiation patch, therefore trap reflector can be realized the characteristic of its reflector, antenna gain is improved, by adjusting the distance between trap reflector and knot radiation patch, can obtain optimal antenna gain.
For ensure trap characteristic and reflection characteristic simultaneously, the micro-length that is all greater than antenna knot radiation patch with the micro-length with open-circuit line of open-circuit line and the right in the left side, therefore trap frequency will be lower than operating frequency of antenna, and by regulating, the trap reflector left side is micro-to be regulated with the micro-length with open-circuit line of open-circuit line and the right the large I of trap frequency simultaneously.
Corresponding to the working frequency range of Bow―tie antenna, spacing between the first load(ing) point of trap reflector and the end of feed transmission line is approximately the quarter-wave of working frequency range low frequency end, spacing between the second load(ing) point of trap reflector and the end of feed transmission line is approximately the quarter-wave of working frequency range front end, like this with regard to the bandwidth of operation of broadening, reflector performance and the matching performance that can in wider frequency band, realize simultaneously.
Structurally, the width of the conduction band 3 of the feed transmission line of the broadband Bow―tie 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 feed transmission line is wider at the input 8 of feed transmission line, and making input is microstrip line, is conveniently connected with feed coaxial line; Between first load(ing) point 9 and the end 10 of feed transmission line of trap reflector, the width on the ground 4 of feed transmission line is consistent with the width of conduction band 3, forms two-wire line, conveniently knot radiation patch 1 is carried out to feed.Between the first load(ing) point 9 of the input 8 of feed transmission line and trap reflector, the width on ground 4 can be linearity or arc gradual change.The shape of two knot radiation patch 1 can be triangle strip, or the shape such as triangle strip with toothed edge.
On manufacturing, the manufacturing process of the broadband Bow―tie antenna of this double frequency trap reflector can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.The broadband Bow―tie antenna of this double frequency trap reflector is made up of knot radiation patch 1, feed transmission line 2, medium substrate 5 and trap reflector 6, the wherein conduction band of the microstrip transmission line 7 of the conduction band 3 of knot radiation patch 1, feed transmission line 2 and ground 4 and trap reflector 6 and ground, all formed by the good conductor material of electric conductivity, be printed on medium substrate 5.Medium substrate 5 is wanted the alap dielectric material of service wear.Two pasters of knot radiation patch 1 become anti-pode shape to be printed on the two sides of medium substrate 5, are connected respectively, so that carry out feed by two-wire-microstrip-fed transmission line with the conduction band 3 of two-wire-microstrip-fed transmission line 2 with ground 4 at the end 10 of feed transmission line.Micro-two sides that is also printed on medium substrate 5 with the micro-conduction band with open-circuit line 12 of open-circuit line 11 and the right and ground, the left side of the microstrip transmission line 7 of trap reflector 6, is connected with the second load(ing) point 13 with ground 4 the first load(ing) points 9 at trap reflector with the conduction band 3 of feed transmission line 2 respectively.
According to the above, just can realize the present invention.
Claims (4)
1. a broadband Bow―tie antenna for double frequency trap reflector, is characterized in that the broadband Bow―tie antenna of this double frequency trap reflector comprises two knot radiation patch (1), feed transmission line (2), medium substrate (5) and trap reflector (6), knot radiation patch (1), feed transmission line (2) and trap reflector (6) are all on medium substrate (5), the shape of two knot radiation patch (1) is triangle, two knot radiation patch (1) become anti-pode shape to be printed on the two sides of medium substrate (5), are connected respectively with the conduction band (3) of feed transmission line and the ground (4) of feed transmission line at the end (10) of feed transmission line, the microstrip transmission line (7) that trap reflector (6) is made up of the two segment length micro-band open-circuit line in the left side (11) that grade, terminal are not opened a way and the micro-band open-circuit line in the right (12) forms, the conduction band of microstrip transmission line (7) and ground are printed on respectively the two sides of medium substrate (5), the micro-band open-circuit line in the micro-band open-circuit line in the left side (11) and the right (12) is placed in respectively the both sides of feed transmission line (2), and its direction of extension is parallel with the direction that knot radiation patch (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 feed transmission line (2) and the end (10) of feed transmission line, at first load(ing) point (9) of trap reflector, the conduction band of the micro-band open-circuit line in the left side (11) is connected with the conduction band (3) of feed transmission line (2) and the ground (4) of feed transmission line respectively with ground, at second load(ing) point (13) of trap reflector, the conduction band of the micro-band open-circuit line in the right (12) is connected with the conduction band (3) of feed transmission line (2) and the ground (4) of feed transmission line respectively with ground.
2. the broadband Bow―tie antenna of double frequency trap reflector according to claim 1, the width on ground (4) that it is characterized in that described feed transmission line (2) is the widest at the input (8) of feed transmission line (2), then narrows gradually, between the input (8) of feed transmission line (2) and first load(ing) point (9) of trap reflector, becomes and the same width of conduction band (3) of feed transmission line (2).
3. the broadband Bow―tie antenna of double frequency trap reflector according to claim 1, the length that it is characterized in that the described micro-band open-circuit line in the left side (11) is about 1/4th of the first trap band wavelength, the length of the micro-band open-circuit line in the right (12) is about 1/4th of the second trap band wavelength, to realize the radiation of suppressing antenna in two trap frequency ranges.
4. the broadband Bow―tie antenna of double frequency trap reflector according to claim 1, the micro-band open-circuit line in the left side (11) of microstrip transmission line (7) and the length of the micro-band open-circuit line in the right (12) described in it is characterized in that all will be grown than the length of knot radiation patch (1), to realize the effect of reflector; And the spacing between first load(ing) point (9) of trap reflector and the end (10) of feed 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 feed transmission line be about carry out near 1/4th minimum operation wavelengths tuning, to realize better reflector characteristic and matching performance simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516252.XA CN104218312A (en) | 2014-09-30 | 2014-09-30 | Broadband bow-tie antenna for dual-band wave trapping reflector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410516252.XA CN104218312A (en) | 2014-09-30 | 2014-09-30 | Broadband bow-tie antenna for dual-band wave trapping reflector |
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| CN104218312A true CN104218312A (en) | 2014-12-17 |
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| CN201410516252.XA Pending CN104218312A (en) | 2014-09-30 | 2014-09-30 | Broadband bow-tie antenna for dual-band wave trapping reflector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921181A (en) * | 2019-04-10 | 2019-06-21 | 西南交通大学 | A kind of bilayer butterfly antenna |
| CN109921181B (en) * | 2019-04-10 | 2024-05-14 | 西南交通大学 | Double-layer butterfly antenna |
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| 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 |
| 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 |
| TW201330383A (en) * | 2012-01-10 | 2013-07-16 | Ralink Technology Corp | High gain antenna and wireless device |
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2014
- 2014-09-30 CN CN201410516252.XA patent/CN104218312A/en active Pending
Patent Citations (5)
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| 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 |
| 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 |
| TW201330383A (en) * | 2012-01-10 | 2013-07-16 | Ralink Technology Corp | High gain antenna and wireless device |
| 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 (2)
| Title |
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| M.MIDRIO等: "Planar, Compact Dual-Band Antenna for wireless LAN Applications", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921181A (en) * | 2019-04-10 | 2019-06-21 | 西南交通大学 | A kind of bilayer butterfly antenna |
| CN109921181B (en) * | 2019-04-10 | 2024-05-14 | 西南交通大学 | Double-layer butterfly antenna |
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Application publication date: 20141217 |
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