CN104577345A - Horn antenna - Google Patents
Horn antenna Download PDFInfo
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- CN104577345A CN104577345A CN201310513240.7A CN201310513240A CN104577345A CN 104577345 A CN104577345 A CN 104577345A CN 201310513240 A CN201310513240 A CN 201310513240A CN 104577345 A CN104577345 A CN 104577345A
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Abstract
The invention provides a horn antenna. The horn antenna comprises a waveguide transition section and an opening angle section integrally formed with the waveguide transition section, wherein the bottom of the opening angle section is connected with the top end of the waveguide transition section; an opening gradually widened from the top end of the waveguide transition section is formed in the inner wall of the opening angle section; corrugated grooves are formed in the inner walls of the waveguide transition section and the opening angle section.
Description
Technical field
The present invention relates to the communications field, particularly relate to horn antenna.
Background technology
Horn antenna is the microwave antenna of the waveguide terminal gradual change circle of opening or square-section.Directional diagram due to horn antenna is easy to control, and therefore it both can be used as stand-alone antenna, also can be used as the feed of reflecting surface (such as pot shape satellite antenna).
In a communications system, usually increase the irradiating angle of horn antenna device by increasing loudspeaker bores, but also bring that cost is high thus, complex process, take up room the problem such as larger.Because Computation of Horn Gain does not synchronously increase with actinal surface size, therefore can not unrestrictedly increase loudspeaker bore.
The defect of prior art is that the irradiating angle of loudspeaker is inadequate.Such as, the subtended angle of the horn antenna of prior art and size are also not suitable for Meta Materials satellite plate aerial, cause the Reflector Panel utilance of satellite plate aerial not high, thus limit satellite plate aerial aperture efficiency.
Need the horn antenna redesigning large irradiated area.
Summary of the invention
The invention provides the horn antenna with large irradiated area.
In one embodiment, a kind of horn antenna can comprise waveguide transition section and the subtended angle section integrally formed with described waveguide transition section, be connected with described waveguide transition section top bottom described subtended angle section, the inwall of described subtended angle section has the opening magnified gradually from described waveguide transition section top, and the inwall of wherein said waveguide transition section and described subtended angle section has wave groove.
Preferably, the inwall of described waveguide transition section is from having the opening magnified gradually bottom it to top, and the gradually subtended angle degree of wherein said waveguide transition section inwall is greater than the gradually subtended angle degree of described subtended angle section.
Preferably, the inwall of described waveguide transition section comprises the wave groove of multiple degree of depth ladder gradual change.
Preferably, the inwall of described waveguide transition section has the gradually shallow wave groove of the degree of depth from bottom it to top.
Preferably, the inwall of described subtended angle section comprises dark wave groove such as multiple grade.
Preferably, each well width of described subtended angle section and described waveguide transition section is equal, and wall between adjacent slot is wide equal.
Preferably, the inwall of described subtended angle section and described waveguide transition section forms conical butt inner chamber respectively.
Preferably, described waveguide transition segment length 50 ~ 60mm, and described subtended angle segment length 70 ~ 80mm.
Preferably, described waveguide transition segment length 56.25mm, and described subtended angle segment length 75mm, thus the 133.75mm that the total length of described subtended angle section and the excessive section of described waveguide is.
Preferably, bottom described waveguide transition section, inside radius is 8 ~ 12mm and top inside radius is 13 ~ 16mm, and described subtended angle section top inside radius is 16.5 ~ 18.5mm, and bottom wherein said subtended angle section, inside radius is identical with described waveguide transition section top inside radius.
Preferably, bottom described waveguide transition section, inside radius is 10.05mm and top inside radius is 15mm, and bottom described subtended angle section, inside radius is 15mm and top inside radius is 17.5mm.
Preferably, the degree of depth of the wave groove of described subtended angle section inwall is 1/4 and expects wavelength, and each well width of described subtended angle section and described waveguide transition section is 1/10 expects wavelength and wall wide between adjacent slot is 1/40 expects wavelength.
Preferably, the degree of depth of the wave groove of described subtended angle section inwall is 6.25mm, and the degree of depth of the wave groove of described waveguide transition section inwall to shoal gradually 6.25mm to top from 11.2mm bottom described waveguide transition section.
Preferably, each well width of the wave groove of described subtended angle section and described waveguide transition section is 2.5mm, and the wall between adjacent slot is wide is 0.625mm.
Preferably, the working frequency range scope of described horn antenna is 12 ~ 14GHz.
Preferably, the material of described horn antenna comprises aluminium, copper or its alloy.
Preferably, described horn antenna is the feed of satellite plate aerial.
Accompanying drawing explanation
Fig. 1 is the profile of horn antenna according to an embodiment of the invention;
Fig. 2 is the generalized section of the waveguide transition section of horn antenna according to an embodiment of the invention;
Fig. 3 is the generalized section of the subtended angle section of horn antenna according to an embodiment of the invention;
Fig. 4 is the standing-wave ratio schematic diagram of horn antenna according to an embodiment of the invention;
Fig. 5 is horn antenna directional diagram on the first frequency channel according to an embodiment of the invention;
Fig. 6 is the directional diagram of horn antenna on second frequency according to an embodiment of the invention.
Embodiment
The invention provides a kind of horn antenna of large irradiated area.Embodiments of the invention are described in detail below in conjunction with accompanying drawing.
Fig. 1 is the profile of horn antenna according to an embodiment of the invention.As shown in the figure, this horn antenna can comprise waveguide transition section 10 and the subtended angle section 20 integrally formed with waveguide transition section 10.Be connected with waveguide transition section 10 top bottom subtended angle section 20, the inwall of subtended angle section 20 has the opening magnified gradually from waveguide transition section 10 top, and the inwall of wherein waveguide transition section 10 and subtended angle section 20 has wave groove 50.In one embodiment, wave groove 50 is formed while forming waveguide transition section 10 and subtended angle section 20.Wave groove 50 is the grooves on the inwall of waveguide transition section 10 and subtended angle section 20, and it can have level and smooth or non-surface smoothly.The direction of wave groove 50 can be orthogonal with the axle center running through waveguide changeover portion 10 and subtended angle section 20 of this horn antenna.In other embodiments, the direction of wave groove 50 can become predetermined angular with the axle center of this horn antenna.Each wave groove 50 can be parallel or nonparallel.The wave groove 50 of loudspeaker inwall can suppressed sidelobes effectively, thus is conducive to the consistency keeping good level and pitching face directional diagram.
As shown in the figure, due to the inwall of waveguide transition section 10 and subtended angle section 20 having wave groove 50, therefore on the inwall of waveguide transition section 10 and subtended angle section 20, define inner-wall material remaining after fluting on corrugated plate 60(outstanding in the inner chamber of this horn antenna and horn antenna inwall).In one embodiment, each well width of waveguide transition section 10 and subtended angle section 20 is equal, and wall wide (that is, the thickness of corrugated plate 60) between adjacent slot is equal.In other embodiments, each well width can be unequal, and/or wall between adjacent slot is wide can be unequal.
In one embodiment, this horn antenna also can comprise the waveguide segment 40 integrally formed with waveguide transition section 10, subtended angle section 20, and waveguide segment 40 is connected to the bottom of waveguide transition section 10.This horn antenna forms the cavity 30 running through waveguide segment 40, waveguide transition section 10 and subtended angle section 20.Waveguide segment 40 also can be formed separately and be assembled to waveguide transition section 10, or this horn antenna can not comprise waveguide segment 40.
As shown in the figure, the inwall of waveguide transition section 10 is from having the opening magnified gradually to top bottom it, wherein the gradually subtended angle degree of waveguide transition section 10 inwall is greater than the gradually subtended angle degree of subtended angle section 20.In one embodiment, the inwall of waveguide transition section 10 and subtended angle section 20 forms conical butt inner chamber respectively, and wherein the top inside radius of waveguide transition section 10 is identical with the bottom inside radius of subtended angle section 20.In other embodiments, waveguide transition section 10 can form cylindrical cavity, and its inside radius is identical with the bottom inside radius of subtended angle section 20.
In one embodiment, the inwall of subtended angle section 20 can comprise dark wave groove such as multiple grade, and the inwall of waveguide transition section 10 can comprise the wave groove of multiple degree of depth ladder gradual change.Such as, the inwall of waveguide transition section 10 has the gradually shallow wave groove of the degree of depth from bottom it to top.The gradually shallow wave groove of this degree of depth can reduce standing wave effectively, thus provides better performance for horn antenna.In one embodiment, the degree of depth of the wave groove of subtended angle section 20 inwall can be 1/4 expectation wavelength.Each well width of subtended angle section 20 and waveguide transition section 10 can be 1/10 and expects wavelength and wall between adjacent slot is wide can be 1/40 and expect wavelength.In a preferred embodiment, the degree of depth of the wave groove of subtended angle section 20 inwall can be 6.25mm, and the degree of depth of the wave groove of waveguide transition section 10 inwall can to shoal 6.25mm from bottom waveguide transition section 10 gradually to top from 11.2mm.Each well width of the wave groove of subtended angle section 20 and waveguide transition section 10 can be 2.5mm, and the wall between adjacent slot is wide can be 0.625mm.
The outer surface of waveguide transition section 10 can be cylindrical, and the outer surface of subtended angle section 20 can be conical butt.It will be understood by those skilled in the art that in other embodiments, the outer surface of waveguide transition section 10 can be other rule or irregularly shaped (such as, rectangle), and the outer surface of subtended angle section 20 also can be other rules or irregularly shaped.The thickness of subtended angle section 20 and waveguide transition section 10 can be identical or different.
The technology that in prior art, each part of separate machined fits together again may cause size difference, rigging error, joint loss etc.And in one embodiment of the invention, waveguide transition section 10 and the corrugated plate 60 on subtended angle section 20 and inwall thereof are integrally formed with identical metal material (such as, aluminium, copper and alloy thereof).Such as, by the integrally formed waveguide transition section 10 of eletroforming and subtended angle section 20, form wave groove 50(simultaneously and correspondingly define corrugated plate 60), thus effectively suppressed sidelobes, reduce voltage standing wave ratio, improve antenna performance.
Fig. 2 is the generalized section of the waveguide transition section 10 of horn antenna according to an embodiment of the invention.As shown in the figure, waveguide transition section 10 is shown to have the waveguide of truncated cone inner chamber, its length L1 can be 50 ~ 60mm, and it is 8 ~ 12mm that bottom inner diameter r1 can be inside radius bottom 16 ~ 24mm() and top internal diameter r2 can be 26 ~ 32mm(inside radius is 13 ~ 16mm).Waveguide segment 40 can form cylindrical cavity, and its internal diameter can be identical with the bottom inner diameter r1 of waveguide transition section 10.The inwall of waveguide transition section 10 can have the circumferential wave groove 50 of multiple degree of depth ladder gradual change, on the inwall of waveguide transition section 10, therefore define annular corrugated 60 of highly gradient outstanding in the inner chamber of this horn antenna.Preferably, the degree of depth of the wave groove 50 of waveguide transition section 10 inwall can to shoal 6.25mm from bottom waveguide transition section 10 gradually to top from 11.2mm.
If the outer surface of waveguide transition section 10 is cylindrical, then waveguide transition section 10 can have uniform wall thickness t(from bottom wave groove to the distance of the outer surface of waveguide transition section 10), such as wall thickness t is 2 ~ 6mm, be preferably 3.7mm.Correspondingly, waveguide transition section 10 can be identical with the external diameter R1 of cylindrical waveguide section 40.
Fig. 3 is the generalized section of the subtended angle section 20 of horn antenna according to an embodiment of the invention.As shown in the figure, subtended angle section 20 is shown to have the waveguide of truncated cone inner chamber, the inwall of subtended angle section 20 can have the circumferential wave groove 50 that multiple grade is dark, on the inwall of subtended angle section 20, therefore define in the inner chamber of this horn antenna outstanding contour annular corrugated 60.The length L2 of subtended angle section 20 can be 70 ~ 80mm, it is 16.5 ~ 18.5mm that subtended angle section 20 top internal diameter r3 can be 33 ~ 37mm(inside radius), subtended angle section 20 bottom inner diameter is identical with waveguide transition section 10 top internal diameter r2, and such as can be 26 ~ 32mm(inside radius is 13 ~ 16mm).Preferably, the degree of depth of the wave groove 50 of subtended angle section 20 inwall can be 6.25mm.
The outer surface of subtended angle section 20 can be conical butt, subtended angle section 20 can have uniform wall thickness t(from bottom wave groove to the distance of the outer surface of subtended angle section 20), such as wall thickness t is 2 ~ 6mm, be preferably 3.7mm.Correspondingly, the bottom external diameter R1 of subtended angle section 20 can be identical with the external diameter R1 of waveguide transition section 10.
Those skilled in the art can understand, the cavity shape of horn antenna and internal diameter determine its working frequency range and electromagenetic wave radiation pattern, therefore the various sizes carefully designing horn antenna are necessary, to reach the standing-wave ratio of expectation, irradiating angle and Sidelobe Suppression effect.The standing-wave ratio of antenna reflects the level of impedance match of antenna and feeder line, and expects the standing-wave ratio of horn antenna to be designed to as far as possible close to 1(ideal situation).Working frequency range scope according to the horn antenna of the present invention's design is 12 ~ 14GHz, and has good standing-wave ratio and gain pattern.This type of horn antenna standing wave of Emulating display good (all below 1.12), and far-field pattern 10dB angle is between 95 ° ~ 81 ° within the scope of 12 ~ 14GHz, range of exposures is larger.
In a preferred embodiment of the invention, the long 56.25mm of waveguide transition section 10, and the long 75mm of subtended angle section 20, thus the 133.75mm that the total length of subtended angle section 20 and the excessive section 10 of waveguide is; Bottom waveguide transition section 10, inside radius is 10.05mm and top inside radius is 15mm, and bottom subtended angle section 20, inside radius is 15mm and top inside radius is 17.5mm; The degree of depth of the wave groove of subtended angle section 20 inwall is 6.25mm, and the degree of depth of the wave groove of waveguide transition section 10 inwall to shoal gradually 6.25mm from 11.2mm from bottom to top; Each well width of the wave groove of subtended angle section 20 and waveguide transition section 10 is 2.5mm, and the wall between adjacent slot is wide is 0.625mm.Those skilled in the art can understand, each concrete size of horn antenna can change rightly and not depart from protection scope of the present invention.
Fig. 4 is the emulation standing-wave ratio schematic diagram of horn antenna according to an embodiment of the invention.In Fig. 4, transverse axis shows frequency, and the longitudinal axis shows standing-wave ratio.As can be seen from the standing-wave ratio-frequency curve in Fig. 4, in working frequency range scope 12 ~ 14GHz, the horn antenna according to the present invention's design has good standing-wave ratio, all below 1.12, because herein is provided good impedance matching and antenna performance.
Fig. 5 is the directional diagram of horn antenna on first frequency (12.25GHz) according to an embodiment of the invention, and wherein main lobe amplitude is 11.6dB, and far-field pattern 10dB angle is 95.8 °, and secondary lobe increases to-29.9dB.Can find out, this horn antenna has good directivity and larger irradiating angle, and effectively inhibits the gain of secondary lobe.
Fig. 6 is the directional diagram of horn antenna on second frequency (14GHz) according to an embodiment of the invention, and wherein main lobe amplitude is 12.7dB, and far-field pattern 10dB angle is 81.9 °, and side lobe gain is-31.6dB.Can find out, this horn antenna has good directivity and larger irradiating angle, and effectively inhibits the gain of secondary lobe.
Horn antenna of the present invention can be used as stand-alone antenna and carries out Signal reception and/or transmitting.In addition, because horn antenna of the present invention has good directivity and larger irradiating angle, therefore can be applicable on dull and stereotyped satellite antenna.Such as, this horn antenna can be used as the feed of dull and stereotyped satellite antenna, and is erected at the preset distance place above this dull and stereotyped satellite antenna.The spherical wave sent from horn antenna (feed) can send plane wave after dull and stereotyped satellite antenna reflection, thus communicates with satellite as transmitting antenna.Conversely, the satellite-signal that aerial radiation comes converges in horn antenna after the reflection of dull and stereotyped satellite antenna, thus can receiving satellite signal effectively.Horn antenna of the present invention has larger irradiating angle, and the ripple of loudspeaker inwall is conducive to the consistency keeping good level and pitching face directional diagram, makes horn antenna unnecessary far away apart from dull and stereotyped satellite antenna actinal surface.
In one embodiment, dull and stereotyped satellite antenna can be metamaterial flat satellite antenna, and it comprises the metamaterial flat of sheet, the base material that this metamaterial flat comprises sheet and the multiple man-made microstructure be arranged on base material.By arranging the multiple micro-structural of continuous print on base material, continuous print electric field and/or magnetic responsiveness can be had to make whole metamaterial flat to electromagnetic wave.Also can have reflector below metamaterial flat, preferably there is the metallic reflector of smooth surface, the copper coin of such as polishing, aluminium sheet or iron plate etc., or metal coating.When electromagnetic wave is by refractive index dielectric material heterogeneous, can to the large direction deviation of refractive index.Such as, this dull and stereotyped satellite antenna can have with certain point for the center of circle is according to multiple annular sections of refraction index profile, and along with the increase refractive index of radius reduces gradually, therefore metamaterial flat can have convergence effect to electromagnetic wave.First the electromagnetic wave launched from satellite is converged by metamaterial flat, then through reflective layer reflects, just can converge on the feed above this dull and stereotyped satellite antenna, thus is used as reception antenna.Conversely, the spherical wave sent from feed (point source) can send plane wave after metamaterial flat and reflector, therefore can be used as transmitting antenna, communicate with satellite.
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 scope of the present invention.
Claims (17)
1. a horn antenna, is characterized in that, comprising:
Waveguide transition section, and
The subtended angle section integrally formed with described waveguide transition section, be connected with described waveguide transition section top bottom described subtended angle section, the inwall of described subtended angle section has the opening magnified gradually from described waveguide transition section top, and the inwall of wherein said waveguide transition section and described subtended angle section has wave groove.
2. horn antenna as claimed in claim 1, it is characterized in that, the inwall of described waveguide transition section is from having the opening magnified gradually bottom it to top, and the gradually subtended angle degree of wherein said waveguide transition section inwall is greater than the gradually subtended angle degree of described subtended angle section.
3. horn antenna as claimed in claim 1, it is characterized in that, the inwall of described waveguide transition section comprises the wave groove of multiple degree of depth ladder gradual change.
4. horn antenna as claimed in claim 3, it is characterized in that, the inwall of described waveguide transition section has the gradually shallow wave groove of the degree of depth from bottom it to top.
5. horn antenna as claimed in claim 1, it is characterized in that, the inwall of described subtended angle section comprises dark wave groove such as multiple grade.
6. horn antenna as claimed in claim 1, it is characterized in that, each well width of described subtended angle section and described waveguide transition section is equal, and wall between adjacent slot is wide equal.
7. horn antenna as claimed in claim 1, it is characterized in that, the inwall of described subtended angle section and described waveguide transition section forms conical butt inner chamber respectively.
8. horn antenna as claimed in claim 1, is characterized in that, described waveguide transition segment length 50 ~ 60mm, and described subtended angle segment length 70 ~ 80mm.
9. horn antenna as claimed in claim 1, is characterized in that, described waveguide transition segment length 56.25mm, and described subtended angle segment length 75mm, thus the 133.75mm that the total length of described subtended angle section and the excessive section of described waveguide is.
10. horn antenna as claimed in claim 7, it is characterized in that, bottom described waveguide transition section, inside radius is 8 ~ 12mm and top inside radius is 13 ~ 16mm, and described subtended angle section top inside radius is 16.5 ~ 18.5mm, bottom wherein said subtended angle section, inside radius is identical with described waveguide transition section top inside radius.
11. horn antennas as claimed in claim 10, is characterized in that, bottom described waveguide transition section, inside radius is 10.05mm and top inside radius is 15mm, and bottom described subtended angle section, inside radius is 15mm and top inside radius is 17.5mm.
12. horn antennas as claimed in claim 1, it is characterized in that, the degree of depth of the wave groove of described subtended angle section inwall is 1/4 and expects wavelength, and each well width of described subtended angle section and described waveguide transition section is 1/10 expects wavelength and wall wide between adjacent slot is 1/40 expects wavelength.
13. horn antennas as claimed in claim 1, it is characterized in that, the degree of depth of the wave groove of described subtended angle section inwall is 6.25mm, and the degree of depth of the wave groove of described waveguide transition section inwall to shoal gradually 6.25mm to top from 11.2mm bottom described waveguide transition section.
14. horn antennas as claimed in claim 1, it is characterized in that, each well width of the wave groove of described subtended angle section and described waveguide transition section is 2.5mm, and the wall between adjacent slot is wide is 0.625mm.
15. horn antennas according to any one of claim 1 to 14, it is characterized in that, the working frequency range scope of described horn antenna is 12 ~ 14GHz.
16. horn antennas according to any one of claim 1 to 14, it is characterized in that, the material of described horn antenna comprises aluminium, copper or its alloy.
17. horn antennas according to any one of claim 1 to 14, it is characterized in that, described horn antenna is the feed of satellite plate aerial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513240.7A CN104577345B (en) | 2013-10-25 | 2013-10-25 | Electromagnetic horn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513240.7A CN104577345B (en) | 2013-10-25 | 2013-10-25 | Electromagnetic horn |
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| CN104577345A true CN104577345A (en) | 2015-04-29 |
| CN104577345B CN104577345B (en) | 2018-10-12 |
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| CN201310513240.7A Active CN104577345B (en) | 2013-10-25 | 2013-10-25 | Electromagnetic horn |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107799901A (en) * | 2017-10-25 | 2018-03-13 | 四川莱源科技有限公司 | A kind of improved all channel antenna |
| CN108565554A (en) * | 2018-01-25 | 2018-09-21 | 电子科技大学 | A kind of highization Terahertz corrugated horn |
| CN111168287A (en) * | 2019-12-09 | 2020-05-19 | 常州工业职业技术学院 | Intelligent robot digital welding system and working method thereof |
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| CN111168287A (en) * | 2019-12-09 | 2020-05-19 | 常州工业职业技术学院 | Intelligent robot digital welding system and working method thereof |
| CN111168287B (en) * | 2019-12-09 | 2021-09-14 | 常州工业职业技术学院 | Intelligent robot digital welding system and working method thereof |
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| CN104577345B (en) | 2018-10-12 |
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Effective date of registration: 20210415 Address after: 2 / F, software building, No.9, Gaoxin Zhongyi Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 18B, building a, CIC international business center, 1061 Xiangmei Road, Futian District, Shenzhen, Guangdong 518034 Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
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