CN109659699B - Dual-polarized waveguide horn antenna for millimeter wave frequency band - Google Patents
Dual-polarized waveguide horn antenna for millimeter wave frequency band Download PDFInfo
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- CN109659699B CN109659699B CN201710939700.0A CN201710939700A CN109659699B CN 109659699 B CN109659699 B CN 109659699B CN 201710939700 A CN201710939700 A CN 201710939700A CN 109659699 B CN109659699 B CN 109659699B
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- 230000010287 polarization Effects 0.000 claims abstract description 36
- 230000009977 dual effect Effects 0.000 claims abstract description 18
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- 229910052751 metal Inorganic materials 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 4
- 238000004904 shortening Methods 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 4
- 238000003491 array Methods 0.000 abstract 6
- 238000004891 communication Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000005388 cross polarization Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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Abstract
The invention discloses a dual-polarization waveguide horn antenna for a millimeter wave frequency band, which comprises waveguides, a horn and a power divider, and is characterized in that the waveguides are open rectangular waveguides or open ridge waveguides, the number of the waveguides is 4M, orthogonal arrays are arranged on the surface of an antenna opening, 2M waveguides are arranged in two polarization directions to form linear arrays, the 4 waveguides closest to the center of the orthogonal arrays are defined as first waveguides, the 4 waveguides farthest from the center of the orthogonal arrays are defined as second waveguides, the horn comprises a first horn part arranged on the wide edge of an open end of the first waveguide close to the center of the orthogonal arrays and a second horn part arranged on the wide edge of the open end of the second waveguide far away from the center of the orthogonal arrays, and the length of the first horn part is smaller than that of the second horn part. The antenna has good symmetrical dual polarization, small volume, low processing cost and small scattering, can realize the symmetry of EH plane beams, and is superior to the traditional millimeter wave antenna.
Description
Technical Field
The invention relates to the field of communication, in particular to a dual-polarized waveguide horn antenna for a millimeter wave frequency band.
Background
Millimeter waves refer to electromagnetic waves having a frequency in the range of 30GHz to 300GHz, with the corresponding wavelength range being 1mm to 10 mm. In recent years, due to the current situation of crowded spectrum resources and the continuous increase of demand for high-speed communication, the millimeter wave field has become an extremely active field for the research, development and utilization of international electromagnetic spectrum resources, and the millimeter wave band has a large amount of continuous spectrum resources, thereby providing possibility for the realization of ultra-high-speed broadband wireless communication.
In a wireless communication system, an antenna is one of essential key components. The most critical criterion of an antenna is its radiation characteristics. Millimeter wave communication provides a new design challenge for antenna performance, and a millimeter wave antenna with good radiation performance has strict requirements on beam width, pattern symmetry, main beam polarization purity, port isolation, VSWR (Voltage Standing wave ratio), gain and the like. For dual polarized antennas, in particular for measurements, the symmetry of their polarization greatly affects the accuracy of the antenna. The conventional dual-polarized antenna mainly comprises the following components:
1. the corrugated horn antenna is commonly used for far field and compact field measurement, can realize symmetric dual polarization, has high cross polarization purity of the antenna and symmetric EH surface wave beams, but has the defects of high difficulty of the antenna processing technology, high processing cost, need of orthogonal coupling feed, large volume of the antenna and large scattering.
2. A square waveguide antenna, which can realize symmetric dual polarization but needs orthogonal coupling feed. The orthogonal coupling feed with excellent performance is large in volume, the square waveguide EH plane beam is generally asymmetric, and the antenna is large in volume and large in scattering.
3. The open waveguide antenna is easy to design and manufacture, is commonly used for near field measurement, but only supports single polarization signal receiving and transmitting, and dual polarization needs to be completed by mechanical rotation and calibration, so that circular polarization cannot be synthesized, and mechanical rotation errors are introduced in dual polarization receiving and transmitting.
Disclosure of Invention
In order to solve the above problems, the present invention provides a dual-polarized waveguide horn antenna for millimeter wave band, comprising a waveguide, a horn and a power divider, wherein the waveguide comprises a feeding end and an open end, and is characterized in that the waveguide is an open rectangular waveguide or an open ridge waveguide, the number of the waveguides is 4M, M is a positive integer, the waveguides are arranged in an orthogonal array on an opening surface of the dual-polarized waveguide horn antenna, wherein 2M waveguides are arranged in a linear array in a first polarization direction, and the polarization direction of the 2M waveguides is consistent with the first polarization direction, the remaining 2M waveguides are arranged in a linear array in a second polarization direction, and the polarization direction of the 2M waveguides is consistent with the second polarization direction, the 4 waveguides closest to the center of the orthogonal array are defined as first waveguides, and the 4 waveguides farthest from the center of the orthogonal array are defined as second waveguides, the loudspeaker are including locating the first horn portion that first waveguide is close to the open end broadside at quadrature array center and locating the second horn portion that the open end broadside at quadrature array center was kept away from to the second waveguide, and the length of first horn portion is less than the length of second horn portion.
In a further aspect of the present invention, the first flared portion is formed by gradually shortening a width of an opening end of the first waveguide near a center of the orthogonal array, and the second flared portion is formed by gradually expanding a width of an opening end of the second waveguide far from the center of the orthogonal array.
As a further limitation of the present invention, the 4 first horns are tapered to the same point along the open-end broadsides of the first waveguides near the center of the orthogonal array to form a tower shape.
As a further limitation of the present invention, the feeding end of the 2M waveguides in the first polarization direction is connected to 1 2M power divider, and the feeding end of the 2M waveguides in the second polarization direction is connected to another 1 2M power divider.
As a further limitation of the invention, M.ltoreq.4.
As a further limitation of the present invention, M is 1, and the first waveguide is a second waveguide.
As a further limitation of the present invention, the waveguide and the horn are both good conductor metals or have a surface layer of a good conductor metal.
As a further limitation of the invention, said dual polarized waveguide horn antenna is used as a measuring antenna.
On the other hand, the invention provides a dual-polarized waveguide horn array antenna for a millimeter wave frequency band, which is characterized in that any one of the dual-polarized waveguide horn antennas is used as an array element to form the dual-polarized waveguide horn array antenna.
The antenna has good symmetrical dual polarization, small volume, low processing cost and small scattering, can realize the symmetry of EH plane beams, and is superior to the traditional millimeter wave antenna.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view showing a dual polarized waveguide horn antenna for a millimeter wave band according to a first embodiment of the present invention.
Fig. 2 is a schematic view showing a dual polarized waveguide horn antenna for a millimeter wave band according to a second embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is intended to be in the nature of an illustration of the invention and not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Fig. 1 illustrates a first embodiment of the dual-polarized waveguide horn antenna for millimeter-wave band according to the present invention, and a dual-polarized waveguide horn antenna 100 (hereinafter referred to as an antenna 100) of the present embodiment includes a waveguide 110, a horn 120, and a power divider (not shown), where the waveguide 110 and the horn 120 are both good conductor metals or at least the surface layer thereof is a good conductor metal. The waveguides 110 are open-ridge waveguides comprising 8, arranged in an orthogonal array on the aperture plane of the antenna 100, wherein: the 4 waveguides 110 are arranged in a linear array in a first polarization direction, the polarization direction of the 4 waveguides 110 is consistent with the first polarization direction, and the feed ends of the 4 waveguides 110 are connected with a 4-way power divider; the other 4 waveguides 110 are arranged in a linear array in the second polarization direction, and the polarization direction of the 4 waveguides 110 is the same as the second polarization direction, and the feeding ends of the 4 waveguides 110 are connected to the other 1 4 power dividers. The waveguides 110 are divided into 4 first waveguides 110a nearest to the center of the orthogonal array and 4 second waveguides 110b farthest from the center of the orthogonal array, accordingly, the horn 120 includes a first horn portion 120a disposed on the wide side of the open end of the first waveguide 110a close to the center of the orthogonal array and a second horn portion 120b disposed on the wide side of the open end of the second waveguide 110b far from the center of the orthogonal array, and the length of the first horn portion 120a is smaller than that of the second horn portion 120 b. In addition, the first horns 120a are formed by gradually shortening the width of the open ends of the first waveguides 110a near the center of the orthogonal array, and in this embodiment, 4 first horns 120a are formed in a tower shape; the second flared portion 120b is gradually flared along the open end broadside of the second waveguide 110b away from the center of the orthogonal array.
The antenna 100 of the present embodiment can be used as a measuring antenna. Further, the antenna 100 may also be used as an array element to form a dual-polarized waveguide horn array antenna.
The advantageous effects of the design of each part in the present embodiment will be explained here. The 2 waveguides 110 in the polarization directions are fed by 2 4 power dividers, so that the same power and phase transmitted by the waveguides 110 with the same polarization can be ensured, and further, the stability of the performance of beam pointing, standing wave, gain and the like of the antenna 100 can be ensured. The first horn 120a can reduce coupling between the waveguides 110, adjust the aperture field distribution of the antenna 100, and reduce scattering of the antenna 100; the second horn 120b can confine the aperture field of the antenna 100, adjust the EH plane beam, and reduce the scattering of the antenna 100. The length of the first horn part 120a is small, so that the mouth surface field splitting is avoided, the gain reduction and the wave beam splitting are avoided, and the length of the second horn part 120b is long, so that the mouth surface field is effectively restrained, and the gain is ensured. In which the 4 first horns 120a are tapered to the same point along the wide side of the open end of the first waveguide 110a near the center of the orthogonal array to form a tower, which avoids scattering.
Fig. 2 illustrates a second embodiment of the dual-polarized waveguide horn antenna for millimeter-wave frequency band according to the present invention, and the dual-polarized waveguide horn antenna 200 (hereinafter referred to as antenna 200) of the second embodiment is mainly different from the antenna 100 of the first embodiment in that: the number of waveguides 210 in the antenna 200 is 4, which are open rectangular waveguides.
Through simulation, the two embodiments have good VSWR, beam gain, directional diagram symmetry, beam width and main beam polarization purity in a millimeter wave frequency band.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and those skilled in the art can make several substitutions or modifications to the described embodiments without departing from the spirit of the present invention, and these substitutions or modifications should be considered as falling within the scope of the present invention.
Claims (9)
1. A dual-polarization waveguide horn antenna for a millimeter wave frequency band comprises waveguides, a horn and a power divider, wherein the waveguides comprise a feed end and an open end, and the dual-polarization waveguide horn antenna is characterized in that the waveguides are open rectangular waveguides or open ridge waveguides, the number of the waveguides is 4M, M is a positive integer, the waveguides are arranged into an orthogonal array on the opening surface of the dual-polarization waveguide horn antenna, 2M waveguides are arranged into a linear array in a first polarization direction, the polarization direction of the 2M waveguides is consistent with the first polarization direction, the rest 2M waveguides are arranged into a linear array in a second polarization direction, the polarization direction of the 2M waveguides is consistent with the second polarization direction, the 4 waveguides closest to the center of the orthogonal array are defined as first waveguides, the 4 waveguides farthest from the center of the orthogonal array are defined as second waveguides, the horn comprises a first horn portion arranged on the wide side of the open end of the first waveguide close to the center of the orthogonal array and a second waveguide portion arranged on the wide side of the second waveguide far away from the open end of A second flared portion of the open end broadside at the center of the orthogonal array, and the length of the first flared portion is less than the length of the second flared portion.
2. The dual polarized waveguide horn antenna for millimeter wave bands of claim 1 wherein said first horn section is formed by gradually shortening the width of the open end of the first waveguide near the center of the orthogonal array and said second horn section is formed by gradually expanding the width of the open end of the second waveguide far from the center of the orthogonal array.
3. The dual polarized waveguide feedhorn for the millimeter wave band of claim 2 wherein said 4 first horns are stepped down to the same point along the open broad sides of the first waveguides near the center of the orthogonal array.
4. A dual polarized waveguide horn antenna for the millimeter wave band according to any of claims 1 to 3 wherein the feeding terminals of said 2M waveguides in the first polarization direction are connected to 1 2M power divider, and the feeding terminals of said 2M waveguides in the second polarization direction are connected to the other 1 2M power divider.
5. A dual polarized waveguide feedhorn for the millimeter wave band as claimed in any one of claims 1 to 3 wherein M is 4 or less.
6. The dual polarized waveguide feedhorn for the millimeter wave band of claim 5, wherein said M-1, said first waveguide being the second waveguide.
7. The dual polarized waveguide horn antenna for millimeter wave bands of claims 1,2,3, and 6, wherein said waveguide and horn are both good conductor metals or have a surface layer of good conductor metals.
8. A dual polarized waveguide horn antenna for the millimeter wave band as claimed in any of claims 1,2,3,6, wherein said dual polarized waveguide horn antenna is used as a measuring antenna.
9. A dual-polarized waveguide horn array antenna for a millimeter wave frequency band, characterized in that the dual-polarized waveguide horn array antenna is formed by using any one of the dual-polarized waveguide horn antennas of claims 1,2,3, and 6 as an array element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939700.0A CN109659699B (en) | 2017-10-11 | 2017-10-11 | Dual-polarized waveguide horn antenna for millimeter wave frequency band |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710939700.0A CN109659699B (en) | 2017-10-11 | 2017-10-11 | Dual-polarized waveguide horn antenna for millimeter wave frequency band |
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| CN109659699A CN109659699A (en) | 2019-04-19 |
| CN109659699B true CN109659699B (en) | 2020-10-02 |
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| CN113131217B (en) * | 2021-04-22 | 2022-06-24 | 成都频时科技有限公司 | All-metal dual-polarized open waveguide antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874923A (en) * | 1994-07-28 | 1999-02-23 | Trulstech Innovation Handelsbolag | Feeder horn, intended particularly for two-way satellite communications equipment |
| CN101465474A (en) * | 2007-12-21 | 2009-06-24 | 阿尔卡特朗讯 | Dual polarised radiating element for cellular base station antennas |
| CN103390798A (en) * | 2013-07-26 | 2013-11-13 | 南京友乔电子科技有限公司 | COTM (communication on the move) satellite communication dual polarization quadruple ridged horn array antenna |
| CN204315728U (en) * | 2014-12-05 | 2015-05-06 | 安徽四创电子股份有限公司 | Circular polarization precision closely enters elevation antenna and phase array |
| CN205069833U (en) * | 2015-09-08 | 2016-03-02 | 安徽四创电子股份有限公司 | A ware is divided to ridge waveguide merit for ridge waveguide slot antenna battle array |
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2017
- 2017-10-11 CN CN201710939700.0A patent/CN109659699B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874923A (en) * | 1994-07-28 | 1999-02-23 | Trulstech Innovation Handelsbolag | Feeder horn, intended particularly for two-way satellite communications equipment |
| CN101465474A (en) * | 2007-12-21 | 2009-06-24 | 阿尔卡特朗讯 | Dual polarised radiating element for cellular base station antennas |
| CN103390798A (en) * | 2013-07-26 | 2013-11-13 | 南京友乔电子科技有限公司 | COTM (communication on the move) satellite communication dual polarization quadruple ridged horn array antenna |
| CN204315728U (en) * | 2014-12-05 | 2015-05-06 | 安徽四创电子股份有限公司 | Circular polarization precision closely enters elevation antenna and phase array |
| CN205069833U (en) * | 2015-09-08 | 2016-03-02 | 安徽四创电子股份有限公司 | A ware is divided to ridge waveguide merit for ridge waveguide slot antenna battle array |
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