CN103094666B - Millimeter wave omnidirectional circularly polarized antenna based on circularly polarized loudspeaker - Google Patents
Millimeter wave omnidirectional circularly polarized antenna based on circularly polarized loudspeaker Download PDFInfo
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- CN103094666B CN103094666B CN201210562216.8A CN201210562216A CN103094666B CN 103094666 B CN103094666 B CN 103094666B CN 201210562216 A CN201210562216 A CN 201210562216A CN 103094666 B CN103094666 B CN 103094666B
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Abstract
The invention relates to a millimeter wave omnidirectional circularly polarized antenna based on a circularly polarized loudspeaker. The millimeter wave omnidirectional circularly polarized antenna comprises a millimeter wave circularly polarized loudspeaker, and is characterized by further comprising a metal conical reflective face and the millimeter wave circularly polarized loudspeaker. An output end of the millimeter wave circularly polarized loudspeaker is a standard BJ320 waveguide, and an input mode is a TE10 mode which can be converted into a TE11 mode through a rectangular-circularly convertor. A circular polarization device respectively presents the capacitive function and the inductive load function to a perpendicular electric field vector and a horizontal electric field vector so that phases of the two vectors are lagged and lead, and the fact that waves radiated from an expanded T-shaped metal table has a good circularly polarization characteristic is guaranteed. The circularly polarized waves are radiated on the metal conical reflective face, the main radiation direction of the waves is changed from the axial direction to the radial direction, the direction of the radiation waves rotates reversely, the circularly polarization characteristic is not changed, but the radiation waves are omnidirectional, and circularly polarized radiation in a large angle range on a pitch face is achieved.
Description
Technical field
The present invention relates to one and belong to millimeter wave antenna field, be specifically related to azimuth plane omnidirectional, pitching mask has the omnidirectional circular-polarized antenna of wider radiation beam, is a kind of millimeter wave omnidirectional circular-polarized antenna based on Circular polarization horn.
Background technology
So-called polarization, refers to the time dependent mode of electromagnetic field intensity orientation, generally shows wave polarization with the trajectory table that electric field strength vector end-points each cycle internal space describes.So-called circular polarized antenna, the direction and the size that refer to the elect magnetic field electric field of antenna institute radiation are not fixing in space, but in a plane, form a circle along with the change of time.The realization of Circular polarized omni-directional is more difficult, and the realization of millimeter wave omnidirectional circular-polarized antenna is especially difficult, and the method realizing omnidirectional circular-polarized antenna known at present mainly comprises:
1.V type a period of time battle array.Utilize two mutually vertical and form basic a period of time battle array at a distance of quarter-wave doublet, far zone field electric field amplitude is identical in the horizontal direction, phase 90 °.90 ° of directions increase basic a period of time battle array, Circular polarized omni-directional radiation can be realized.This structure is applicable to comparatively low-frequency range, is not suitable for millimeter wave field.
2. perimeter array antenna.The commonly perimeter array antenna of micro-band forms, utilizes constant amplitude power division network, carries out feed to unit, can realize omnidirectional radiation on azimuth plane.Corner cut process carried out to microstrip element simultaneously or adopt duplex feeding structure, to realize circular polarization characteristics.The limitation of this implementation is that annular radius is subject to the restriction of overall antennas sizes, and need select suitable number of unit to realize omnidirectional radiation, the deviation in roundness of antenna pattern is bad, standing wave bandwidth and axial ratio bandwidth narrower, when being operated in high band, aerial loss is comparatively large, and radiation efficiency is lower.
Summary of the invention
The technical problem solved
In order to avoid the deficiencies in the prior art part, the present invention proposes a kind of millimeter wave omnidirectional circular-polarized antenna based on Circular polarization horn, and have azimuth plane omnidirectional, pitching face is compared with the characteristic of circular polarization radiation within the scope of broad beam.
Technical scheme
Based on a millimeter wave omnidirectional circular-polarized antenna for Circular polarization horn, comprise millimeter wave Circular polarization horn 2, characterized by further comprising round metal pyramidal reflex face 1 and the T-shaped metal step 6 magnified; The T-shaped metal step 6 magnified coaxially is connected with the output of millimeter wave Circular polarization horn 2, at the output of the T-shaped metal step 6 magnified, coaxially arranges round metal pyramidal reflex face 1, and the vertex of a cone points to the T-shaped metal step 6 magnified.
Described millimeter wave Circular polarization horn 2 comprises feed section input 3, square circle transducer 4, two circular waveguides and circular polarizer 5; Feed section input 3 output connects the input of square circle transducer 4, and connecting portion is the rectangle that size matches; The output of square circle transducer 4 connects the input of the first circular waveguide, and connecting portion is the circle that size matches; First circular waveguide connects the second circular waveguide by circular polarizer 5; Described circular polarizer 5 be become the metal derby of miter angle to form by two with the electric field intensity E of TE11 mould.
The upper bottom surface radius r 3 in described round metal pyramidal reflex face is greater than the radius r 2 of the T-shaped metal step magnified.
The radius r 2 of the described T-shaped metal step magnified is greater than the radius r 1 of circular waveguide 9.
Spacing between the described T-shaped metal step 6 that magnifies and round metal pyramidal reflex face 1 is greater than half wavelength, is no more than two wavelength.
Described metal derby is made up of polylith metal derby 7.
Outside millimeter wave Circular polarization horn 2, be arranged with foamed plastics cylinder 8, round metal pyramidal reflex face 1 is placed on foam plastic barrel 8.
Beneficial effect
A kind of millimeter wave omnidirectional circular-polarized antenna based on Circular polarization horn that the present invention proposes, round metal pyramidal reflex face is irradiated with millimeter wave Circular polarization horn, metal circular cone reflecting surface changes electromagnetic wave propagation direction, make it become radial radiation from axial radiation, thus achieve the omnidirectional radiation of azimuth plane; Simultaneously when circularly polarised wave is radiated the target of a circle symmetry, the only reverse rotation of radiated wave direction, its circular polarization characteristics does not change.So when using said structure, both can realize omnidirectional's characteristic, circular polarization performance can be ensured again.
The present invention, compared with existing omnidirectional circular-polarized antenna form, has following advantage: version is simple, and directional diagram deviation in roundness is better, and loss is little, and the angle of radiation scope on pitching face is adjustable, is adapted at millimeter wave field and uses.
Accompanying drawing explanation
Fig. 1: when circular polarizer is bimetallic block, Circular polarization horn irradiates round metal pyramidal reflex face structural representation;
Fig. 2: millimeter wave circularly-polarizedhorn horn antenna structural representation;
Fig. 3: when circular polarizer is cycle metal-loaded block, Circular polarization horn irradiates round metal pyramidal reflex face structural representation;
Fig. 4: the structural representation of this antenna during concrete enforcement;
Fig. 5: this inner antenna physical dimension schematic diagram during concrete enforcement;
Fig. 6: the gain pattern of antenna;
Fig. 7: the axial ratio directional diagram of antenna;
1-round metal pyramidal reflex face, 2-millimeter wave Circular polarization horn, 3-feed section input, 4-square circle transducer, 5-circular polarizer, the metal step that 6-T type magnifies, 7-, 8-foamed plastics, 9-circular waveguide,
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
The present embodiment is divided into two parts to design:
1. the design of millimeter wave Circular polarization horn: the feed section of millimeter wave Circular polarization horn adopts standard BJ320 waveguide, and input pattern is TE01 mould, TE10 mode convertion is the TE11 mould being adapted at transmitting in circular waveguide by square circle transducer.Circular polarizer adopts the method for circular waveguide metal-loaded block to realize, and it is made up of the circular waveguide and two blocks of metal derbies becoming miter angle to place with the electric field intensity E of TE11 mould transmitting TE11 mould.When electric field intensity is by circular polarizer, it presents capacitive and perceptual loading effect respectively to vertical electric field vector horizontal electrical field vector, thus makes the delayed phase of two vectors and advanced, as long as the size of two metal derbies and insert depth are selected suitable, just can make E
x, E
ybetween produce the phase difference of 90 degree, realize circular polarization.Different from the angle of circular waveguide electric field intensity according to circular polarizer, left-hand circular polarization cycle of feed can be realized respectively loading stepped with electric field intensity angle at 45 ° and right-handed circular polarization cycle loading stepped angle at 45 ° with electric field intensity.Feed end bore T-shaped is opened, and to change waveguide mode further and to irradiate subtended angle, coordinates with reflecting surface.
2. round metal pyramidal reflex face: irradiate round metal pyramidal reflex face with millimeter wave Circular polarization horn, metal circular cone reflecting surface changes electromagnetic wave propagation direction, makes it become radial radiation from axial radiation, thus achieves the omnidirectional radiation of azimuth plane; Simultaneously when circularly polarised wave is radiated the target of a circle symmetry, the only reverse rotation of radiated wave direction, its circular polarization characteristics does not change.So when using said structure, both can realize omnidirectional's characteristic, circular polarization performance can be ensured again.By changing the shape in round metal pyramidal reflex face and the distance with millimeter wave Circular polarization horn, the circularly polarised wave angular range of radiation and axial ratio bandwidth of antenna on pitching face can be regulated.When round metal pyramidal reflex identity distance becomes large from the distance of Circular polarization horn, the axial ratio bandwidth of antenna becomes large, and the main radiation direction on pitching face moves down.When designing, for ensureing the efficiency of antenna, should ensure that metal cone reflecting surface radius is greater than the radius of T-shaped metal step of growing up.
Concrete structure, with reference to shown in accompanying drawing 4 and accompanying drawing 5, mainly comprises: round metal pyramidal reflex face 1, millimeter wave Circular polarization horn 2, foam plastic barrel 8, and foamed plastics 8 is used for support metal cone reflecting surface 1.
This example to the requirement of antenna is: operating frequency is Ka wave band, and beamwidth is omnidirectional on azimuth plane, in pitch orientation 60 ° ~ 100 °, and axial ratio is less than 6dB, and antenna gain is greater than 3dB, and deviation in roundness is less than 4dB.With reference to accompanying drawing 5, its structural parameters are: input is standard BJ320 waveguide 3, is of a size of 7.112mm × 3.556mm, and square circle transducer 4 length h is 6mm, circular waveguide 9 radius r 1 is 5mm, length h1 is 20mm, and the width w of circular polarizer 5 is 3.1mm, and T-shaped metal step 6 radius r 2 of magnifying is 10.5mm, height h2 is 10mm, round metal pyramidal reflex face 1 upper bottom surface radius r 3 is 19mm, and cone height h3 is 15.5mm, and the distance l of the vertex of a cone and the T-shaped metal step 6 magnified is 6mm.As shown in Figure 6, achieve the omnidirectional radiation in E face as can be seen, deviation in roundness is less than 1dB to the gain pattern of antenna, and the axial ratio directional diagram of antenna as shown in Figure 7, can ensure that axial ratio is less than 6dB within the scope of 40 ° 60 ° ~ 100 ° as seen in the pitch direction.
The course of work of the present embodiment: the input of millimeter wave Circular polarization horn 2 is TE10 mould, the TE11 mould being adapted at circular waveguide and propagating is changed into after square circle transducer 4, the degree of depth embedded by Reasonable adjustment circular polarizer 5 and width, millimeter wave loudspeaker can be made to realize circular polarization radiation, simultaneously by increasing the T-shaped metal step 6 magnified in front end, the radiation of the ripple that can partly suppress millimeter wave Circular polarization horn 2 circular polarization characteristics bad, thus the radiated wave decreasing millimeter wave Circular polarization horn 2 is to the interference of radiated wave after the reflection of round metal pyramidal reflex face 1, and then the angle of radiation scope widened in pitch orientation.Can improve millimeter wave Circular polarization horn 2 in the present invention, thus increase the bandwidth of operation of antenna.Accompanying drawing 3 irradiates round metal pyramidal reflex face 1 structural representation for millimeter wave Circular polarization horn when circular polarizer is cycle metal-loaded block, compared with example shown in this example with accompanying drawing 1, greatly can increase the bandwidth of operation of antenna.
When millimeter wave Circular polarization horn 2 is determined, the geometric parameter in adjustment round metal pyramidal reflex face 1, can ensure under the prerequisite of Circular polarized omni-directional, and the specific requirement according to design meets other index pitching ground roll beam width, pitching surface radiation angle etc.The main geometric parameters of the conical surface comprises: distance, upper bottom surface radius, the cone height of the metal step 6 that top distance T-shaped is magnified.
1 ~ 5 can find out that the present embodiment version is simple with reference to the accompanying drawings, and 6 ~ 7 can find out that the present embodiment directional diagram deviation in roundness is good with reference to the accompanying drawings, and loss is little, and the angle of radiation scope on pitching face is adjustable, is adapted at millimeter wave field and uses.
Claims (6)
1. based on a millimeter wave omnidirectional circular-polarized antenna for Circular polarization horn, comprise millimeter wave Circular polarization horn (2), characterized by further comprising round metal pyramidal reflex face (1) and the T-shaped metal step (6) magnified; The T-shaped metal step (6) magnified coaxially is connected with the output of millimeter wave Circular polarization horn (2), at the output of the T-shaped metal step (6) magnified, round metal pyramidal reflex face (1) is coaxially set, and the vertex of a cone points to the T-shaped metal step (6) magnified; Described millimeter wave Circular polarization horn (2) comprises feed section input (3), square circle transducer (4), two circular waveguides (9) and circular polarizer (5); Feed section input (3) output connects the input of square circle transducer (4), and connecting portion is the rectangle that size matches; The output of square circle transducer (4) connects the input of the first circular waveguide, and connecting portion is the circle that size matches; First circular waveguide connects the second circular waveguide by circular polarizer (5); Described circular polarizer (5) be become the metal derby of miter angle to form by two with the electric field intensity E of TE11 mould.
2. according to claim 1 based on the millimeter wave omnidirectional circular-polarized antenna of Circular polarization horn, it is characterized in that: the upper bottom surface radius r 3 in described round metal pyramidal reflex face is greater than the radius r 2 of the T-shaped metal step magnified.
3. according to claim 1 based on the millimeter wave omnidirectional circular-polarized antenna of Circular polarization horn, it is characterized in that: the radius r 2 of the described T-shaped metal step magnified is greater than the radius r 1 of circular waveguide (9).
4. according to claim 1 based on the millimeter wave omnidirectional circular-polarized antenna of Circular polarization horn, it is characterized in that: the spacing between the described T-shaped metal step (6) that magnifies and round metal pyramidal reflex face (1) is greater than half wavelength, is no more than two wavelength.
5. according to claim 1 based on the millimeter wave omnidirectional circular-polarized antenna of Circular polarization horn, it is characterized in that: described metal derby is made up of polylith metal derby (7).
6. according to claim 1 based on the millimeter wave omnidirectional circular-polarized antenna of Circular polarization horn, it is characterized in that: outside millimeter wave Circular polarization horn (2), be arranged with foamed plastics cylinder (8), round metal pyramidal reflex face (1) is placed on foam plastic barrel (8).
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| CN201210562216.8A CN103094666B (en) | 2012-12-21 | 2012-12-21 | Millimeter wave omnidirectional circularly polarized antenna based on circularly polarized loudspeaker |
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| CN201210562216.8A CN103094666B (en) | 2012-12-21 | 2012-12-21 | Millimeter wave omnidirectional circularly polarized antenna based on circularly polarized loudspeaker |
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| CN103094666B true CN103094666B (en) | 2015-04-08 |
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Families Citing this family (10)
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| CN103457033B (en) * | 2013-08-27 | 2016-04-13 | 上海交通大学 | compact broadband circular polarizer |
| CN103943918B (en) * | 2014-02-28 | 2016-04-06 | 上海无线电设备研究所 | A kind of method of circular polarizer and output circularly polarised wave thereof |
| CN107275803B (en) * | 2017-05-31 | 2021-06-15 | 西安华讯天基通信技术有限公司 | Millimeter wave lens reflection type intelligent antenna device |
| CN108232460B (en) * | 2017-11-29 | 2024-04-12 | 安徽四创电子股份有限公司 | Small-caliber conical horn with equal wave beam |
| CN107887693B (en) * | 2017-12-12 | 2023-11-17 | 成都雷电微力科技股份有限公司 | Circularly polarized probe antenna structure |
| CN108767475B (en) * | 2018-04-28 | 2021-09-28 | 安徽四创电子股份有限公司 | Antenna directional diagram shaping structure based on step transformation |
| CN109346827B (en) * | 2018-09-14 | 2020-06-09 | 北京空间飞行器总体设计部 | Small-size wide band circular polarization feed suitable for mars are surveyed |
| CN110740002A (en) * | 2019-10-25 | 2020-01-31 | Oppo广东移动通信有限公司 | kinds of electronic equipment |
| CN112670718B (en) * | 2020-11-03 | 2022-05-13 | 南京理工大学 | Pure water short backfire antenna with reconfigurable working mode |
| TWI766633B (en) * | 2020-11-18 | 2022-06-01 | 稜研科技股份有限公司 | Broadband linear polarization antenna structure |
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| CN102136634A (en) * | 2011-01-12 | 2011-07-27 | 电子科技大学 | Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna |
| CN102136631A (en) * | 2010-11-01 | 2011-07-27 | 西安空间无线电技术研究所 | S/X double-band circularly polarization feed source |
| CN202395161U (en) * | 2011-12-26 | 2012-08-22 | 上海磁浮交通发展有限公司 | High power beamforming vehicle-mounted antenna with two-stage structure |
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| EP0189982A1 (en) * | 1985-01-21 | 1986-08-06 | National Research Development Corporation | Circularly polarizing antenna feed |
| JPH0541603A (en) * | 1991-08-06 | 1993-02-19 | Fujitsu General Ltd | Primary radiator in common use with circularly polarized wave and linearly polarized wave |
| CN102136631A (en) * | 2010-11-01 | 2011-07-27 | 西安空间无线电技术研究所 | S/X double-band circularly polarization feed source |
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