CN104659481A - Linearly polarized cavity-backed antenna with low cross polarization characteristic - Google Patents
Linearly polarized cavity-backed antenna with low cross polarization characteristic Download PDFInfo
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- CN104659481A CN104659481A CN201510083218.2A CN201510083218A CN104659481A CN 104659481 A CN104659481 A CN 104659481A CN 201510083218 A CN201510083218 A CN 201510083218A CN 104659481 A CN104659481 A CN 104659481A
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Abstract
The invention relates to a linearly polarized cavity-backed antenna with a low cross polarization characteristic. The linearly polarized cavity-backed antenna comprises an upper dielectric substrate and a lower dielectric substrate which are stacked, wherein a first metal layer is arranged on the upper surface of the upper dielectric substrate, a second metal layer is arranged between the upper dielectric substrate and the lower dielectric substrate, and a third metal layer is arranged on the lower surface of the lower dielectric substrate; a plurality of metallized through holes are formed in the upper dielectric substrate; a rectangular resonant cavity adopting a square shape is defined by the first metal layer, the second metal layer and the plurality of metallized through holes, a feed microstrip line is formed on the third metal layer, and a coupling slot coupled with the feed microstrip line is formed in the part, corresponding to the rectangular resonant cavity, of the second metal layer; four radiation slots with equal length are distributed in the part, corresponding to the rectangular resonant cavity, of the first metal layer at intervals, and any two adjacent radiation slots of the four radiation slots are symmetrical relative to a diagonal, projected on the first metal layer, of the rectangular resonant cavity. The linearly polarized cavity-backed antenna has the benefit of lower cross polarization level.
Description
Technical field
The present invention relates to microwave technical field, more particularly, relate to a kind of linear polarization cavity-backed radiator antenna of low-cross polarization characteristic of having.
Background technology
Along with the development of communication system, also more and more higher to the requirement of the performance of antenna, the antenna impelling people to start realizing low-cross polarization characteristic is studied.Improve the cross polarization characteristics of antenna, not only contribute to improving its radiation characteristic, also help and realize polarization diversity function, have important real value for raising communication quality.
Researcher has done some researchs for linear polarization cavity-backed radiator antenna both at home and abroad at present.But the cross polarization characteristics of these linear polarization cavity-backed radiator antennas that existing document proposes is not good, and in the main radiation direction of antenna, (-90 °-+90 °) are difficult to be less than negative-30dB.
Therefore, prior art existing defects, needs improvement badly.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, provides a kind of linear polarization cavity-backed radiator antenna with low-cross polarization characteristic.
The technological means that technical solution problem of the present invention adopts is: provide a kind of linear polarization cavity-backed radiator antenna with low-cross polarization characteristic, comprise the upper medium substrate of stacked setting and lower medium substrate, the upper surface of described upper medium substrate is provided with the first metal layer, be provided with the second metal level between described upper medium substrate and described lower medium substrate, the lower surface of described lower medium substrate is provided with the 3rd metal level; Described upper medium substrate offers multiple plated-through hole, described the first metal layer, described second metal level and the plurality of plated-through hole surround a foursquare rectangular cavity, described 3rd metal level forms feeding microstrip line, and on described second metal level, the part of described rectangular cavity offers a coupling gap be coupled with described feeding microstrip line; On described the first metal layer, the part of corresponding described rectangular cavity offers four length radiating slot equal and spaced apart, these four radiating slots are distributed on a predetermined foursquare four edges respectively, and in these four radiating slots, arbitrary neighborhood two radiating slots are symmetrical about a pair linea angulata of the projection of described rectangular cavity on described the first metal layer.
Have in the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic provided by the invention, the rectangular strip in described coupling gap, described coupling gap is orthogonal with a diagonal of the projection of described rectangular cavity on described second metal level.
Have in the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic provided by the invention, the rectangular strip of described feeding microstrip line, the projection of described feeding microstrip line on described second metal level distributes along the perpendicular bisector in the gap that is coupled described in this.
Have in the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic provided by the invention, described upper medium substrate and described lower medium substrate employing model are that the material of Rogers 5880 is made.
Have in the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic provided by the invention, the thickness of described lower medium substrate is 0.254mm, and the thickness of described upper medium substrate is 0.508mm.
Implement provided by the invention to have in the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic, there is following beneficial effect: because four radiating slots adopting in the present invention two diagonal about rectangular cavity projection on the first metal layer distribute symmetrically, thus make this far-field pattern with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic can all obtain lower cross-polarization levels on E face and H face, be extremely conducive to the demand of modern communications.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the perspective view with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic in one embodiment of the present invention.
Fig. 2 is the planar structure schematic diagram with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic in one embodiment of the present invention.
Fig. 3 be the present invention embodiment illustrated in fig. 1 in the return loss analogous diagram with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic.
Fig. 4 be the present invention embodiment illustrated in fig. 1 in the Direction Pattern Simulation figure with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.First-selected embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, the object of these embodiments is provided to be make to disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.。
With reference to shown in Fig. 1 and Fig. 2, in the present embodiment, this linear polarization cavity-backed radiator antenna with low-cross polarization characteristic comprises lower medium substrate 1 and the upper medium substrate 2 of stacked setting, the upper surface of described upper medium substrate 2 is provided with the first metal layer 3, be provided with the second metal level 4 between described upper medium substrate 2 and described lower medium substrate 1, the lower surface of described lower medium substrate 1 is provided with the 3rd metal level 5.Described upper medium substrate 2 offers multiple plated-through hole 6.Wherein, upper medium substrate 1 and lower medium substrate 2 all adopt Rogers 5880 material to make.The thickness of lower medium substrate 2 is 0.254mm, and the thickness of upper medium substrate 1 is 0.508mm.The diameter of plated-through hole 6 is 0.25mm.
Particularly, the plurality of plated-through hole 6, along a square arrangement, makes described the first metal layer 3, described second metal level 4 and the plurality of plated-through hole 6 surround a foursquare rectangular cavity 7.This foursquare length of side is 5.35mm.Described 3rd metal level 5 is formed the feeding microstrip line 8 being used for feed, on described second metal level 4, the part of corresponding described rectangular cavity 7 offers a coupling gap 9 be coupled with described feeding microstrip line 8; On described the first metal layer 3, the part of corresponding described rectangular cavity 7 offers four length radiating slot 10 equal and spaced apart, these four radiating slots 10 are distributed on a predetermined foursquare four edges respectively, in these four radiating slots 10, arbitrary neighborhood two radiating slots 10 are all about a diagonal symmetry of the projection of described rectangular cavity 7 on this first metal layer 3, obviously this projection has a rectangular shape, and the limit that these four radiating slots 10 project with this rectangular cavity 7 is respectively corresponding and parallel.Preferably, all rectangular strip of these four radiating slots 10, length is 3.5mm, and width is 0.25mm.
Have benefited from these four radiating slots 10 of adopting in this invention to distribute symmetrically about two diagonal of the projection of rectangular cavity 7 on the first metal layer 3, thus make this far-field pattern with the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic can all obtain lower cross-polarization levels on E face and H face, be extremely conducive to the demand of modern communications.
Further, the rectangular strip in described coupling gap 9, described coupling gap 9 is orthogonal with a diagonal of the projection of described rectangular cavity 7 on described second metal level 4.The length in this coupling gap 9 is 1.35mm, and width is 0.25mm.This feeding microstrip line 8 also rectangular strip, its width is 0.8mm, and length is 9mm.The projection of feeding microstrip line 8 on described second metal level 4 distributes along the perpendicular bisector in this coupling gap 9.
Understandably, each dimensional parameters involved in the present embodiment is the situation under a kind of preferred implementation, and it should as the condition of restriction scope, and its each dimensional parameters can carry out corresponding conversion according to actual needs.
Fig. 3 is the simulation result of antenna return loss performance, show this linear polarization cavity-backed radiator antenna with low-cross polarization characteristic can in the working band that centre frequency is 31.75GHz effective emittance.Fig. 4 is the Direction Pattern Simulation result of antenna, this figure shows, in the main radiation direction of linear polarization cavity-backed radiator antenna with low-cross polarization characteristic, (-90 °-+90 °) this antenna can be less than the cross-polarization performance of-40dB substantially in E face and H face.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (5)
1. one kind has the linear polarization cavity-backed radiator antenna of low-cross polarization characteristic, it is characterized in that, comprise the upper medium substrate of stacked setting and lower medium substrate, the upper surface of described upper medium substrate is provided with the first metal layer, be provided with the second metal level between described upper medium substrate and described lower medium substrate, the lower surface of described lower medium substrate is provided with the 3rd metal level; Described upper medium substrate offers multiple plated-through hole, described the first metal layer, described second metal level and the plurality of plated-through hole surround a foursquare rectangular cavity, described 3rd metal level forms feeding microstrip line, and on described second metal level, the part of described rectangular cavity offers a coupling gap be coupled with described feeding microstrip line; On described the first metal layer, the part of corresponding described rectangular cavity offers four length radiating slot equal and spaced apart, these four radiating slots are distributed on a predetermined foursquare four edges respectively, and in these four radiating slots, arbitrary neighborhood two radiating slots are symmetrical about a pair linea angulata of the projection of described rectangular cavity on described the first metal layer.
2. the linear polarization cavity-backed radiator antenna with low-cross polarization characteristic according to claim 1, it is characterized in that, the rectangular strip in described coupling gap, described coupling gap is orthogonal with a diagonal of the projection of described rectangular cavity on described second metal level.
3. the linear polarization cavity-backed radiator antenna with low-cross polarization characteristic according to claim 2, it is characterized in that, the rectangular strip of described feeding microstrip line, the projection of described feeding microstrip line on described second metal level distributes along the perpendicular bisector in the gap that is coupled described in this.
4. the linear polarization cavity-backed radiator antenna with low-cross polarization characteristic according to claim 1, is characterized in that, described upper medium substrate and described lower medium substrate employing model are that the material of Rogers 5880 is made.
5. the linear polarization cavity-backed radiator antenna with low-cross polarization characteristic according to claim 4, is characterized in that, the thickness of described lower medium substrate is 0.254mm, and the thickness of described upper medium substrate is 0.508mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510083218.2A CN104659481B (en) | 2015-02-15 | 2015-02-15 | Linear polarization cavity-backed radiator antenna with low-cross polarization characteristic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510083218.2A CN104659481B (en) | 2015-02-15 | 2015-02-15 | Linear polarization cavity-backed radiator antenna with low-cross polarization characteristic |
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| CN104659481A true CN104659481A (en) | 2015-05-27 |
| CN104659481B CN104659481B (en) | 2017-10-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755832A (en) * | 2019-03-29 | 2020-10-09 | 通用汽车环球科技运作有限责任公司 | Integrated cavity-backed slot array antenna system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982898A (en) * | 2010-08-24 | 2011-03-02 | 浙江大学 | Millimetre wave planar antenna and array thereof |
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2015
- 2015-02-15 CN CN201510083218.2A patent/CN104659481B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982898A (en) * | 2010-08-24 | 2011-03-02 | 浙江大学 | Millimetre wave planar antenna and array thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755832A (en) * | 2019-03-29 | 2020-10-09 | 通用汽车环球科技运作有限责任公司 | Integrated cavity-backed slot array antenna system |
| CN111755832B (en) * | 2019-03-29 | 2023-08-04 | 通用汽车环球科技运作有限责任公司 | Integrated back cavity slot array antenna system |
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| CN104659481B (en) | 2017-10-13 |
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Inventor after: Fu Xiaodong Inventor after: Xu Cui Inventor after: Wang Xueren Inventor after: Liu Zhiqing Inventor after: Gu Xiaofeng Inventor after: Zheng Chaoyi Inventor before: Chu Hui Inventor before: Chen Jianxin Inventor before: Tang Hui Inventor before: Zhou Liheng Inventor before: Qin Wei Inventor before: Lu Qingyuan Inventor before: Bao Zhihua |
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Effective date of registration: 20170825 Address after: 226463 Rudong, Jiangsu province Hekou Town Industrial Park Applicant after: Zhongtian Broadband Technology Co., Ltd. Address before: 226019 Jiangsu city of Nantong province sik Road No. 9 Applicant before: Nantong University |
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Effective date of registration: 20191114 Address after: 226463 Zhongtian Industrial Zone, Hekou Town, Rudong County, Jiangsu, Nantong Co-patentee after: Zhongtian Communication Technology Co., Ltd Patentee after: Zhongtian Broadband Technology Co., Ltd. Address before: 226463 Zhongtian Industrial Zone, Hekou Town, Rudong County, Jiangsu, Nantong Patentee before: Zhongtian Broadband Technology Co., Ltd. |
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