CN203026643U - Broadband E-face omnidirectional circularly polarized antenna based on circular waveguide TE11 mode - Google Patents
Broadband E-face omnidirectional circularly polarized antenna based on circular waveguide TE11 mode Download PDFInfo
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- CN203026643U CN203026643U CN 201220714997 CN201220714997U CN203026643U CN 203026643 U CN203026643 U CN 203026643U CN 201220714997 CN201220714997 CN 201220714997 CN 201220714997 U CN201220714997 U CN 201220714997U CN 203026643 U CN203026643 U CN 203026643U
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Abstract
The utility model relates to a broadband E-face omnidirectional circularly polarized antenna based on a circular waveguide TE11 mode. The broadband E-face omnidirectional circularly polarized antenna comprises a millimeter wave circularly polarized speaker. The broadband E-face omnidirectional circularly polarized antenna is characterized by also comprising a metal cone reflecting surface, and a T-shaped wide metal step, wherein the input end of the millimeter wave circularly polarized speaker is standard BJ320 waveguide; the input mode is a TE10 mode; the TE10 mode can be converted into a TE11 mould via a rectangular circle converter; and a circular polarizer respectively displays capacitive and perceptual loading effects on a vertical electric field vector and a horizontal electric field vector, so that the phases of the two vectors are lagged and pulled ahead, so as to ensure the wave radiated by the T-shaped wide metal step has good circular polarization characteristics. The metal cone reflecting surface is irradiated by the circularly polarized wave; a main radiation direction of a wave beam is changed into a radial direction from an axial direction; the radiation wave direction reversely rotates; and the circular polarization characteristics are fixed, so as to achieve the circular polarization radiation within a large angle range of a pitch plane in an azimuth plane in an omnidirectional manner.
Description
Technical field
The present invention relates to a kind of millimeter wave antenna field of belonging to, be specifically related to azimuth plane omnidirectional, the pitching mask has the omnidirectional circular-polarized antenna of wider radiation beam, is a kind of broadband E surface omnidirectional circular-polarized antenna based on circular waveguide TE11 mould.
Background technology
So-called polarization refers to the time dependent mode of electromagnetic field intensity orientation, generally uses the polarization of the trajectory table oscillography of electric field vector per cycle of end points internal space description.So-called circular polarized antenna, the direction and the size that refer to the elect magnetic field electric field of an antenna institute radiation are not fixed in the space, but along with the variation of time forms a circle in a plane.The realization of Circular polarized omni-directional is more difficult, and the realization of millimeter wave omnidirectional circular-polarized antenna is difficulty especially, and the known method that realizes omnidirectional circular-polarized antenna mainly comprises at present:
1.V type a period of time battle array.Utilize two mutually vertically and at a distance of quarter-wave doublet to consist of basic a period of time battle array, the far zone field electric field amplitude is identical in the horizontal direction, 90 ° of phase phasic differences.Increase basic a period of time battle array on 90 ° of directions, can realize the Circular polarized omni-directional radiation.This structure is applicable to not be suitable for millimeter wave field than low-frequency range.
2. perimeter array antenna.Commonly the perimeter array antenna of little band forms, utilize the constant amplitude power division network, and unit is carried out feed, can realize omnidirectional radiation on azimuth plane.Simultaneously microstrip element is carried out corner cut and process or adopt the duplex feeding structure, to realize circular polarization characteristics.The limitation of this implementation is that annular radius is subjected to the restriction of antenna overall dimension, need select suitable number of unit in order to realize omnidirectional radiation, and the deviation in roundness of antenna pattern is bad, standing wave bandwidth and axial ratio bandwidth are narrower, when being operated in high band, aerial loss is larger, and radiation efficiency is lower.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of broadband E surface omnidirectional circular-polarized antenna based on circular waveguide TE11 mould, has azimuth plane omnidirectional, and pitching face is than the characteristic of circular polarization radiation in the broad beam scope.
Technical scheme
A kind of broadband E surface omnidirectional circular-polarized antenna based on circular waveguide TE11 mould comprises millimeter wave Circular polarization horn 2, characterized by further comprising round metal pyramidal reflex face 1 and the T-shaped metal step 6 that magnifies; The T-shaped metal step 6 that magnifies is connected with the output of millimeter wave Circular polarization horn 2 is coaxial, at the output of the T-shaped metal step 6 that magnifies, coaxial round metal pyramidal reflex face 1 is set, and the vertex of a cone points to the T-shaped metal step 6 that magnifies.
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 outputs connect 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; The first circular waveguide connects the one or two circular waveguide by circular polarizer 5; Described circular polarizer 5 be to become the metal derby of miter angle to consist of by two with the electric field intensity E of TE11 mould.
The upper bottom surface radius r 3 of described round metal pyramidal reflex face is greater than the radius r 2 of the T-shaped metal step that magnifies.
The radius r 2 of the described T-shaped metal step that magnifies 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 no more than two wavelength greater than half wavelength.
Described metal derby is made of polylith metal derby 7.
Be arranged with foamed plastics cylinder 8 outside millimeter wave Circular polarization horn 2, round metal pyramidal reflex face 1 is placed on foam plastic barrel 8.
Beneficial effect
A kind of broadband E surface omnidirectional circular-polarized antenna based on circular waveguide TE11 mould that the present invention proposes, with millimeter wave Circular polarization horn irradiation round metal pyramidal reflex face, metal circular cone reflecting surface has changed the electromagnetic wave propagation direction, make it become radial radiation by axial radiation, thereby realized the omnidirectional radiation of azimuth plane; Simultaneously when circularly polarised wave is radiated the symmetrical target of circle, 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, can guarantee the circular polarization performance again.
The present invention compares with existing omnidirectional circular-polarized antenna form, and have following advantage: version is simple, and the directional diagram deviation in roundness is better, and loss is little, and the angle of radiation scope on pitching face can be regulated, and is adapted at millimeter wave field and uses.
Description of drawings
Fig. 1: Circular polarization horn irradiation round metal pyramidal reflex face structural representation when circular polarizer is the bimetallic piece;
Fig. 2: millimeter wave Circular polarization horn antenna structure view;
Fig. 3: circular polarizer is cycle Circular polarization horn irradiation round metal pyramidal reflex face structural representation during the metal-loaded piece;
Fig. 4: the structural representation of this antenna when specifically implementing;
Fig. 5: this antenna inner structure size schematic diagram when specifically implementing;
1-round metal pyramidal reflex face, 2-millimeter wave Circular polarization horn, 3-feed section input, 4-square circle transducer, the 5-circular polarizer, the metal step that the 6-T type magnifies, 7-, the 8-foamed plastics, the 9-circular waveguide,
Fig. 6: the antenna pattern of antenna when specifically implementing;
Fig. 7: the axial ratio directional diagram of antenna when specifically implementing.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
The present embodiment is divided into two parts and designs:
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 the TE01 mould, and square circle transducer is converted to the TE10 mould TE11 mould that is adapted at transmitting in circular waveguide.Circular polarizer adopts the method for circular waveguide metal-loaded piece to realize, it is comprised of circular waveguide and two blocks of metal derbies that become miter angle to place with the electric field intensity E of TE11 mould of transmission TE11 mould.When electric field intensity passed through circular polarizer, it presented respectively capacitive and perceptual loading effect to vertical electric field vector horizontal component of electric field vector, thereby made the phase place of two vectors lag behind and in advance, as long as the size of two metal derbies and insert depth selection are suitable, just can make E
x, E
yBetween produce the phase differences of 90 degree, realize circular polarization.Different from the angle of circular waveguide electric field intensity according to circular polarizer, can realize respectively left-hand circular polarization cycle of feed loading stepped with electric field intensity angle at 45 ° and right-handed circular polarization cycle loading stepped and electric field intensity angle at 45 °.Feed end bore T shape is opened, and with further change waveguide mode and irradiation subtended angle, coordinates with reflecting surface.
2. round metal pyramidal reflex face: with millimeter wave Circular polarization horn irradiation round metal pyramidal reflex face, metal circular cone reflecting surface has changed the electromagnetic wave propagation direction, makes it become radial radiation by axial radiation, thereby has realized the omnidirectional radiation of azimuth plane; Simultaneously when circularly polarised wave is radiated the symmetrical target of circle, 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, can guarantee the circular polarization performance again.Shape by changing round metal pyramidal reflex face and with the distance of millimeter wave Circular polarization horn, can regulate the angular range of circularly polarised wave radiation on pitching face and the axial ratio bandwidth of antenna.When round metal pyramidal reflex identity distance became large from the distance of Circular polarization horn, it is large that the axial ratio bandwidth of antenna becomes, and the main radiation direction on pitching face moves down.When design, for guaranteeing the efficient of antenna, should guarantee that metal cone reflecting surface radius is greater than the radius of T-shaped metal step of growing up.
Concrete structure mainly comprises with reference to shown in accompanying drawing 4 and accompanying drawing 5: round metal pyramidal reflex face 1, millimeter wave Circular polarization horn 2, foam plastic barrel 8, foamed plastics 8 are used for support metal cone reflecting surface 1.
This example to the requirement of antenna is: operating frequency is the Ka wave band, and beamwidth is omnidirectional on azimuth plane, and on pitch orientation 60 °～100 °, 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 are 6mm, circular waveguide 9 radius r 1 are 5mm, length h1 is 20mm, and the width w of circular polarizer 5 is 3.1mm, and the T-shaped metal step that magnifies 6 radius r 2 are 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, the vertex of a cone and the T-shaped metal step 6 that magnifies be 6mm apart from l.The gain pattern of antenna has realized the omnidirectional radiation of E face as shown in Figure 6 as can be seen, and deviation in roundness is less than 1dB, and as seen the axial ratio directional diagram of antenna can guarantee that axial ratio is less than 6dB in 40 ° of 60 °～100 ° scopes as shown in Figure 7 on pitch orientation.
the course of work of the present embodiment: the input of millimeter wave Circular polarization horn 2 is the TE10 mould, change into after square circle transducer 4 and be adapted at the TE11 mould that circular waveguide is propagated, the degree of depth and width by reasonable adjustment circular polarizer 5 embeddings, can make the millimeter wave loudspeaker realize circular polarization radiation, simultaneously by increasing the T-shaped metal step 6 that magnifies of front end, can partly suppress the radiation of the bad ripple of millimeter wave Circular polarization horn 2 circular polarization characteristics, thereby reduced the radiated wave of millimeter wave Circular polarization horn 2 to the interference of radiated wave after 1 reflection of round metal pyramidal reflex face, and then widened the angle of radiation scope on the pitch orientation.Can improve millimeter wave Circular polarization horn 2 in the present invention, thus the bandwidth of operation of increase antenna.Accompanying drawing 3 is cycle millimeter wave Circular polarization horn irradiation round metal pyramidal reflex face 1 structural representation during the metal-loaded piece for circular polarizer, and this example is compared with accompanying drawing 1 example illustrated, can greatly increase the bandwidth of operation of antenna.
In the situation that millimeter wave Circular polarization horn 2 is definite, adjust the geometric parameter of round metal pyramidal reflex face 1, can guarantee under the prerequisite of Circular polarized omni-directional, satisfy other index pitching ground roll beam width, pitching surface radiation angle etc. according to the specific requirement of design.The main geometric parameters of the conical surface comprises: distance, upper bottom surface radius, the cone height of the metal step 6 that magnify apart from T shape on the top.
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 can be regulated, and is adapted at millimeter wave field and uses.
Claims (7)
1. the broadband E surface omnidirectional circular-polarized antenna based on circular waveguide TE11 mould, comprise millimeter wave Circular polarization horn (2), characterized by further comprising round metal pyramidal reflex face (1) and the T-shaped metal step (6) that magnifies; The coaxial connection of output of the T-shaped metal step (6) that magnifies and millimeter wave Circular polarization horn (2), at the output of the T-shaped metal step (6) that magnifies, coaxial round metal pyramidal reflex face (1) is set, and the vertex of a cone points to the T-shaped metal step (6) that magnifies.
2. according to claim 1 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: 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; The first circular waveguide connects the one or two circular waveguide by circular polarizer (5); Described circular polarizer (5) be to become the metal derby of miter angle to consist of by two with the electric field intensity E of TE11 mould.
3. according to claim 1 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: the upper bottom surface radius r 3 of described round metal pyramidal reflex face is greater than the radius r 2 of the T-shaped metal step that magnifies.
4. according to claim 1 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: the radius r 2 of the described T-shaped metal step that magnifies is greater than the radius r 1 of circular waveguide (9).
5. according to claim 1 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: the described T-shaped metal step (6) that magnifies and the spacing between round metal pyramidal reflex face (1) are no more than two wavelength greater than half wavelength.
6. according to claim 2 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: described metal derby is made of polylith metal derby (7).
7. according to claim 1 based on the broadband E surface omnidirectional circular-polarized antenna of circular waveguide TE11 mould, it is characterized in that: be arranged with foamed plastics cylinder (8) outside millimeter wave Circular polarization horn (2), round metal pyramidal reflex face (1) is placed on foam plastic barrel (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220714997 CN203026643U (en) | 2012-12-21 | 2012-12-21 | Broadband E-face omnidirectional circularly polarized antenna based on circular waveguide TE11 mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220714997 CN203026643U (en) | 2012-12-21 | 2012-12-21 | Broadband E-face omnidirectional circularly polarized antenna based on circular waveguide TE11 mode |
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| CN203026643U true CN203026643U (en) | 2013-06-26 |
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| CN 201220714997 Expired - Fee Related CN203026643U (en) | 2012-12-21 | 2012-12-21 | Broadband E-face omnidirectional circularly polarized antenna based on circular waveguide TE11 mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064875A (en) * | 2014-07-02 | 2014-09-24 | 南京理工大学 | Waveguide-type W wave band circularly polarized horn antenna |
| CN108232460A (en) * | 2017-11-29 | 2018-06-29 | 安徽四创电子股份有限公司 | A kind of small-bore conical horn of the changes such as wave beam |
-
2012
- 2012-12-21 CN CN 201220714997 patent/CN203026643U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064875A (en) * | 2014-07-02 | 2014-09-24 | 南京理工大学 | Waveguide-type W wave band circularly polarized horn antenna |
| CN108232460A (en) * | 2017-11-29 | 2018-06-29 | 安徽四创电子股份有限公司 | A kind of small-bore conical horn of the changes such as wave beam |
| 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 |
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Granted publication date: 20130626 Termination date: 20201221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |