CN213071385U - Millimeter wave high-gain filtering antenna - Google Patents
Millimeter wave high-gain filtering antenna Download PDFInfo
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- CN213071385U CN213071385U CN202022280183.0U CN202022280183U CN213071385U CN 213071385 U CN213071385 U CN 213071385U CN 202022280183 U CN202022280183 U CN 202022280183U CN 213071385 U CN213071385 U CN 213071385U
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Abstract
The utility model discloses a millimeter wave high gain filtering antenna, which comprises a main reflecting surface formed by splicing a plurality of main reflecting surface units and an auxiliary reflecting surface formed by splicing a plurality of auxiliary reflecting surface units; the main reflecting surface unit comprises a main medium substrate, one surface of the main medium substrate is fully covered with a main metal, and a plurality of metal resonance units are printed on the other surface of the main medium substrate to form an array; the auxiliary reflecting surface unit comprises a first auxiliary medium substrate and a second auxiliary medium substrate, an auxiliary metal ground is arranged in the middle of the first auxiliary medium substrate, a first metal patch covers the outer surface of the first auxiliary medium substrate, a second metal patch covers the outer surface of the second auxiliary medium substrate, and a U-shaped groove is formed in the second metal patch; the center of the main reflecting surface is provided with a hole, and a horn antenna serving as a feed source penetrates through the main reflecting surface to radiate electromagnetic waves to the auxiliary reflecting surface. The antenna integrates the folded planar transmitting array antenna technology and the frequency selection surface technology, and has the characteristics of high radiation efficiency, integrated filtering function, low profile, small size, low cost and the like.
Description
Technical Field
The utility model belongs to the technical field of the electromagnetic field and microwave technique and specifically relates to a millimeter wave high gain filtering antenna is related to.
Background
Millimeter waves are electromagnetic waves working in a frequency band of 30 GHz-300 GHz, have the characteristics of rich frequency resources, narrow beams, small size and the like, and are receiving more and more attention and application. The antenna and the filter are indispensable devices of the millimeter wave radio frequency front end, and in the traditional radio frequency front end design, an antenna-matching network-filter structure is adopted. The antenna and the filter of the structure need to be combined through a matching network, the structure size is large, the circuit is more complex, and the loss is increased. Therefore, a filtering antenna is proposed at the beginning of the century, a device integrating filtering and radiation functions is constructed, the size of the antenna is reduced, and loss is reduced.
The existing filter antenna basically adopts a microstrip circuit, a substrate integrated waveguide and other transmission line feed networks. The currently designed filter antenna generally has low gain and generally works in a low frequency band.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the not enough of background art, the utility model discloses a millimeter wave high gain filtering antenna carries out integrated design with folding plane transmitting array antenna technique and frequency selection surface technology, has characteristics such as high radiation efficiency, integrated filtering function, low section, small size, with low costs, and the loss problem of feed network has been avoided to the mode that adopts the space feed.
The technical scheme is as follows: the millimeter wave high-gain filtering antenna comprises a main reflecting surface formed by splicing a plurality of main reflecting surface units and an auxiliary reflecting surface formed by splicing a plurality of auxiliary reflecting surface units; the main reflecting surface unit comprises a main medium substrate, one surface of the main medium substrate is fully covered with a main metal ground, and a plurality of metal resonance units are printed on the other surface of the main medium substrate to form an array; the secondary reflection surface unit comprises two medium substrates which are respectively a first secondary medium substrate and a second secondary medium substrate, a secondary metal ground is arranged between the first secondary medium substrate and the second secondary medium substrate, a first metal patch covers the outer surface of the first secondary medium substrate, a second metal patch covers the outer surface of the second secondary medium substrate, a U-shaped groove is formed in the second metal patch, and the first metal patch, the first secondary medium substrate, the secondary metal ground, the second secondary medium substrate and the second metal patch are sequentially overlapped to form the secondary reflection surface unit; the center of the main reflecting surface is provided with a hole, and a horn antenna serving as a feed source is arranged at the hole and penetrates through the main reflecting surface to radiate electromagnetic waves to the auxiliary reflecting surface;
when the feed source radiates the horizontally polarized electromagnetic wave, the auxiliary reflecting surface is used as a frequency selection surface to completely reflect the horizontally polarized electromagnetic wave to the main reflecting surface for phase compensation and polarization torsion, and finally vertical polarization is transmitted through the auxiliary reflecting surface; when the feed source radiates the vertically polarized electromagnetic wave, the auxiliary reflecting surface is used as a frequency selection surface to reflect the vertically polarized electromagnetic wave to the main reflecting surface for phase compensation and polarization torsion, and finally the horizontally polarized electromagnetic wave is transmitted through the auxiliary reflecting surface.
Furthermore, in the sub-reflecting surface, an intermediate layer bonding layer with a relative dielectric constant of 2.7 is arranged between the sub-metal ground and the second sub-dielectric substrate.
Furthermore, the first metal patch, the first auxiliary dielectric substrate, the auxiliary metal ground, the middle layer bonding layer, the second auxiliary dielectric substrate and the second metal patch sequentially penetrate through the copper column to form superposition.
Further, the horn antenna is a rectangular horn antenna.
Furthermore, the metal resonance unit is a rectangular metal sheet and is arranged on the main medium substrate in an inclined manner at an angle of 45 degrees, so that the polarization torsion effect is realized.
Has the advantages that: compared with the prior art, the utility model has the advantages that: the utility model discloses millimeter wave high gain filtering antenna has utilized folding plane reflective array technique and frequency selective surface technique, the principle that the application light path was converted into for the high reduction is half of plane reflective array antenna, the frequency selective surface is as the subreflector, the antenna polarization form flexibility ratio of realizing will promote greatly, can realize the polarization and twist reverse, also can filter, finally realized having high gain, the low loss, low section, advantages such as low cost, and there is filtering function's antenna.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of the main reflector unit of the present invention;
FIG. 3 is a schematic structural diagram of the sub-reflector unit of the present invention;
fig. 4 is a working principle diagram of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
The millimeter-wave high-gain filtering antenna shown in fig. 1 includes a main reflecting surface 1 formed by splicing a plurality of main reflecting surface units and an auxiliary reflecting surface 2 formed by splicing a plurality of auxiliary reflecting surface units, wherein the main reflecting surface 1 is a folding reflective array antenna, and the auxiliary reflecting surface is a frequency selective surface.
As shown in fig. 2, the main reflective surface unit includes a main dielectric substrate 101 (adopting TLY-5), one surface of the main dielectric substrate 101 is completely covered with a main metal, and a plurality of metal resonance units 102 are printed on the other surface to form an array, where the metal resonance units 102 are rectangular metal sheets and are arranged on the main dielectric substrate 101 at an angle of 45 ° to realize a polarization torsion effect.
As shown in fig. 3, the sub-reflective surface unit includes two dielectric substrates (adopting TLY-5), which are a first sub-dielectric substrate 201 and a second sub-dielectric substrate 202, a sub-metal ground 203 is disposed between the first sub-dielectric substrate 201 and the second sub-dielectric substrate 202, a first metal patch 204 covers an outer surface of the first sub-dielectric substrate 201, a second metal patch 205 covers an outer surface of the second sub-dielectric substrate 202, a U-shaped groove is formed in the second metal patch 205, and the first metal patch 204, the first sub-dielectric substrate 201, the sub-metal ground 203, the second sub-dielectric substrate 202, and the second metal patch 205 are sequentially stacked to form the sub-reflective surface unit; the center of the main reflecting surface 1 is provided with a hole, a horn antenna 3 is arranged at the position of the hole and serves as a feed source, the horn antenna 3 is a rectangular horn antenna, a standard rectangular waveguide is used for feeding, and horizontal or vertical polarized electromagnetic waves are radiated and penetrate through the main reflecting surface 1 to radiate electromagnetic waves to the auxiliary reflecting surface 2.
When the feed source radiates the horizontally polarized electromagnetic wave, the auxiliary reflecting surface 2 is used as a frequency selection surface to completely reflect the horizontally polarized electromagnetic wave to the main reflecting surface 1 for phase compensation and polarization torsion, and finally, the vertical polarization is transmitted through the auxiliary reflecting surface 2; when the feed source radiates the vertically polarized electromagnetic wave, the sub-reflecting surface 2 is used as a frequency selective surface to completely reflect the vertically polarized electromagnetic wave to the main reflecting surface 1 for phase compensation and polarization torsion, and finally the horizontally polarized electromagnetic wave is transmitted through the sub-reflecting surface 2.
In the sub-reflecting surface 2, an intermediate adhesive layer 206 having a relative dielectric constant of 2.7 is provided between the sub-metal ground 203 and the second sub-dielectric substrate 202, and rf35 is used.
The first metal patch 204, the first sub-dielectric substrate 201, the sub-metal ground 203, the middle layer adhesive layer 206, the second sub-dielectric substrate 202 and the second metal patch 205 are stacked by sequentially passing through the copper pillar 207.
The frequency selective surface (the subreflector) is arranged, and has a filtering characteristic, so that the filtering characteristic of the folding planar reflective array is improved.
As shown in fig. 4, the working principle of the present invention is as follows: the horn antenna is placed at the focal length position of the main reflecting surface, is used as a feed source to radiate electromagnetic waves, is reflected by the frequency selective surface, is reflected by the main reflecting surface, completes phase compensation and polarization torsion (the horizontal polarization is twisted into vertical polarization), and finally transmits through the frequency selective surface (the auxiliary reflecting surface).
Claims (5)
1. A millimeter-wave high-gain filtering antenna, characterized by: the reflector comprises a main reflecting surface (1) formed by splicing a plurality of main reflecting surface units and an auxiliary reflecting surface (2) formed by splicing a plurality of auxiliary reflecting surface units; the main reflecting surface unit comprises a main medium substrate (101), one surface of the main medium substrate (101) is completely covered with a main metal, and a plurality of metal resonance units (102) are printed on the other surface of the main medium substrate to form an array; the secondary reflection surface unit comprises two medium substrates, namely a first secondary medium substrate (201) and a second secondary medium substrate (202), wherein a secondary metal ground (203) is arranged between the first secondary medium substrate (201) and the second secondary medium substrate (202), a first metal patch (204) covers the outer surface of the first secondary medium substrate (201), a second metal patch (205) covers the outer surface of the second secondary medium substrate (202), a U-shaped groove is formed in the second metal patch (205), and the first metal patch (204), the first secondary medium substrate (201), the secondary metal ground (203), the second secondary medium substrate (202) and the second metal patch (205) are sequentially superposed to form the secondary reflection surface unit; the center of the main reflecting surface (1) is provided with a hole, and a horn antenna (3) serving as a feed source is arranged at the hole and penetrates through the main reflecting surface (1) to radiate electromagnetic waves to the auxiliary reflecting surface (2);
when the feed source radiates horizontal polarization electromagnetic waves, the auxiliary reflecting surface (2) is used as a frequency selection surface to completely reflect the horizontal polarization electromagnetic waves to the main reflecting surface (1) for phase compensation and polarization torsion, and finally vertical polarization is transmitted through the auxiliary reflecting surface (2); when the feed source radiates the vertically polarized electromagnetic waves, the auxiliary reflecting surface (2) is used as a frequency selection surface to completely reflect the vertically polarized electromagnetic waves to the main reflecting surface (1) for phase compensation and polarization torsion, and finally, the horizontally polarized waves are transmitted through the auxiliary reflecting surface (2).
2. The millimeter-wave high gain filtering antenna of claim 1, wherein: in the sub-reflecting surface (2), an intermediate layer adhesive layer (206) having a relative dielectric constant of 2.7 is provided between the sub-metal ground (203) and the second sub-dielectric substrate (202).
3. The millimeter-wave high gain filtering antenna of claim 2, wherein: the first metal patch (204), the first secondary dielectric substrate (201), the secondary metal ground (203), the middle layer bonding layer (206), the second secondary dielectric substrate (202) and the second metal patch (205) sequentially penetrate through the copper column (207) to form superposition.
4. The millimeter-wave high gain filtering antenna of claim 1, wherein: the horn antenna (3) is a rectangular horn antenna.
5. The millimeter-wave high gain filtering antenna of claim 1, wherein: the metal resonance unit (102) is a rectangular metal sheet and is arranged on the main medium substrate (101) in an inclined manner at an angle of 45 degrees, so that the polarization torsion effect is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022280183.0U CN213071385U (en) | 2020-10-14 | 2020-10-14 | Millimeter wave high-gain filtering antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022280183.0U CN213071385U (en) | 2020-10-14 | 2020-10-14 | Millimeter wave high-gain filtering antenna |
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| CN213071385U true CN213071385U (en) | 2021-04-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555697A (en) * | 2021-06-21 | 2021-10-26 | 南京邮电大学 | Circular polarization high-gain antenna based on folding plane reflective array technology |
| CN114512825A (en) * | 2022-03-11 | 2022-05-17 | 电子科技大学 | High-frequency millimeter wave low-profile transmission array antenna |
| CN114649686A (en) * | 2022-05-16 | 2022-06-21 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
-
2020
- 2020-10-14 CN CN202022280183.0U patent/CN213071385U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555697A (en) * | 2021-06-21 | 2021-10-26 | 南京邮电大学 | Circular polarization high-gain antenna based on folding plane reflective array technology |
| CN114512825A (en) * | 2022-03-11 | 2022-05-17 | 电子科技大学 | High-frequency millimeter wave low-profile transmission array antenna |
| CN114649686A (en) * | 2022-05-16 | 2022-06-21 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
| CN114649686B (en) * | 2022-05-16 | 2022-08-02 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
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