CN103730737A - Wedge-shaped gradual change waveguide cavity circular polarizer compact in structure - Google Patents
Wedge-shaped gradual change waveguide cavity circular polarizer compact in structure Download PDFInfo
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- CN103730737A CN103730737A CN201410020383.9A CN201410020383A CN103730737A CN 103730737 A CN103730737 A CN 103730737A CN 201410020383 A CN201410020383 A CN 201410020383A CN 103730737 A CN103730737 A CN 103730737A
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Abstract
The invention provides a wedge-shaped gradual change waveguide cavity type circular polarizer compact in structure. The technical scheme is that the circular polarizer comprises an input port, a metal spacer, a waveguide cavity and an output port. The input port and the output port are square waveguide ports, the diameter of the input port is larger than that of the output port, the waveguide cavity is connected between the input port and the output port and is in a wedge-shaped gradual change shape, the metal spacer is a wedge-shaped metal sheet, and a step is arranged on one side of the metal spacer. The metal spacer is fixed in the waveguide cavity and located on the plane where the radial central axis of the waveguide cavity is located, the bottom edge of the metal spacer is flush with the input port, and the side edge of the metal spacer is matched with an inner cavity of the waveguide cavity. The circular polarizer is simple in structure and small in size, and a working band is wide simultaneously.
Description
Technical field
The invention belongs to Electromagnetic Field and Microwave Technology field, be specifically related to a kind of cavity circularly polarized device of wedge shape tapered waveguide of compact conformation.
Background technology
Microwave system (as communication system) adopts circular polarized antenna transmitting, receives electromagnetic wave, can guarantee that it can receive data under any laying state, realizes the transmission of data.Circular polarizer is the important composition parts of circular polarized antenna, for realizing the mutual conversion between the different polarization of electromagnetic wave, receives and the circular polarized antenna electromagnetic wave mating that polarize, and suppresses the polarized wave of other form, to obtain to polarize, mates, and realizes optimum reception.The circular polarizer of wave-guide cavity wave form is the one of polarizer, mainly realizes the mutual conversion between line-circular polarization.
For the circular polarizer of work in some specific environment (as aerospace craft, satellite, bullet etc.), severe due to narrow space, environment, need to consider miniaturization, structural reliability and the safety Design of antenna.Existing circular polarizer is mainly the waveguide circular polarizer of notch cuttype metal spacer form, and its structure is divided into input port conversion portion d and polarization conversion part e, as depicted in figs. 1 and 2.The type polarizer has without medium and loads and advantage that can entirety processing, mainly contain at present two kinds: input port conversion portion d adopts the circular polarizer (Fig. 1) of the progressive conversion of wedge shape, input port conversion portion d adopts the circular polarizer (Fig. 2) of the progressive conversion of ladder.There is large, the unfavorable system integration of longitudinal size in above-mentioned two kinds of circular polarizers, frequency bandwidth is little, and requirement on machining accuracy is high, be unfavorable for the shortcomings such as its extensive use.Not yet find that at present circular polarizer adopts wedge shape tapered waveguide cavity form.
Summary of the invention
The object of this invention is to provide a kind of circular polarizer of wedge shape tapered waveguide cavity form of compact conformation, solve large, the unfavorable system integration of existing circular polarizer longitudinal size, frequency bandwidth is little, the problems such as requirement on machining accuracy height, realize to greatest extent broadband, the Miniaturization Design of waveguide circular polarizer, expand its range of application.
Technical scheme of the present invention is: a kind of cavity circularly polarized device of wedge shape tapered waveguide (Fig. 3) of compact conformation, comprises input port 1, metal spacer 2, waveguide cavity 3, output port 4.Input port 1 and output port 4 are all rectangular waveguide mouths, and the bore of input port 1 is greater than the bore of output port 4; It is characterized in that, waveguide cavity 3 is connected between input port 1 and output port 4, is wedge shape gradual change shape; Metal spacer 2 is wedge metal thin slices and has ladder 21 on one side; Metal spacer 2 is fixed in waveguide cavity 3, and is positioned at the plane at waveguide cavity 3 radial center axis places; The base 22 of metal spacer 2 is concordant with input port 1, and the side 23 of metal spacer 2 agrees with the inwall of waveguide cavity 3.
Good effect of the present invention is:
The cavity circularly polarized device of wedge shape tapered waveguide provided by the invention, wedge shape tapered waveguide chamber and wedge shape gradual change metal spacer complete structure conversion and the polarization conversion function of input rectangular waveguide mouth to output rectangular waveguide mouth, be equivalent to input port conversion portion and polarization conversion part to unite two into one, effectively simplify structure, shortened longitudinal size, increased working band width, for system Miniaturization Design, the system integration and the application in broadband system provide condition simultaneously.
Accompanying drawing explanation
Fig. 1 is the cutaway view that existing input port conversion portion adopts the circular polarizer of the progressive conversion of wedge shape;
Fig. 2 is the cutaway view that existing input port conversion portion adopts the circular polarizer of the progressive conversion of ladder;
Fig. 3 is the cutaway view of the cavity circularly polarized device of wedge shape tapered waveguide provided by the invention;
Fig. 4 is the end view of the cavity circularly polarized device of wedge shape tapered waveguide provided by the invention;
Fig. 5 is size schematic diagram of the present invention;
Fig. 6 is metal spacer size schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing 4-6, the present invention is described in detail.As shown in Figure 4, input port 1 is divided into two standard rectangular waveguide mouths that size is equal by metal spacer 2, while being propagated in waveguide cavity 3 by the electromagnetic wave of one of them standard rectangular waveguide mouth input, under the effect of metal spacer 2, at output port 4, form two kinds of orthogonal modess, 90 ° of phase phasic differences, and the amplitude of two kinds of patterns equates, meet the condition that circularly polarised wave forms, at output port 4 places, form circularly polarised wave output.
In order to make the present invention obtain better working effect.The bore of output port 4, i.e. square length of side c, meets:
λ
L/2<c<λ
H/1.414。
λ
hrepresent the wavelength corresponding to high frequency value of working frequency range, λ
lrepresent the wavelength corresponding to low frequency value of working frequency range.
By wedge shape tapered waveguide cavity to square output port place, the discontinuity of structure can cause higher mode, for eliminate higher mode can make output port 4 there is certain depth H
2, as shown in Figure 5, depth H
2be generally 1/10 left and right of work centre frequency wavelength.
The present invention unites two into one the input port conversion portion d of existing waveguide circular polarizer and polarization conversion part e, greatly shortens the length H of waveguide cavity 3
1, as shown in Figure 5, length H
1value be 1.4 times of left and right of work centre frequency wavelength.
The thickness t of metal spacer 2 can affect the characteristics such as the phase difference, amplitude of the orthogonal modes of circular polarizer output signal, thereby affects the performances such as the axial ratio, standing wave of circular polarizer.Thickness t choose reality factors such as need to considering existing machining accuracy level, general value is between 0.5-1.0mm.
Ladder 21 exponent numbers of metal spacer 2 are generally elected 5 rank as, as shown in Figure 6, establish from output port 4 to input port 1, and the dimensions length of each ladder is L
i, width is W
i, i=1,2,3,4,5.:
L
1=0.308λ0，W
1=0.055λ
0；
L
2=0.242λ0，W
2=0.132λ
0；
L
3=0.264λ0，W
3=0.220λ
0；
L
4=0.308λ0，W
4=0.308λ
0；
L
5=0.154λ0，W
5=0.473λ
0。
Wherein, λ
0represent work centre frequency corresponding wavelength.
The circular polarizer that the present invention is proposed has carried out accurate Electromagnetic Modeling simulation calculation, and result shows: longitudinal size of the present invention (is that length H1 adds output port depth H
2) be about work centre frequency corresponding wavelength λ
01.5 times time, the bandwidth of operation of axial ratio <0.5dB can reach 15%, the bandwidth of operation of standing wave <1.1 can reach 15%.And centered by the longitudinal size of the waveguide circular polarizer of current existing notch cuttype metal spacer form 4 times of frequency corresponding wavelength time, the bandwidth of operation of axial ratio <0.5dB, standing wave <1.1 only has 10% left and right.
Claims (3)
1. the cavity circularly polarized device of wedge shape tapered waveguide, is characterized in that, comprises input port (1), metal spacer (2), waveguide cavity (3), output port (4); Input port (1) and output port (4) are all rectangular waveguide mouths, and the bore of input port (1) is greater than the bore of output port (4); It is characterized in that, waveguide cavity (3) is connected between input port (1) and output port (4), is wedge shape gradual change shape; Metal spacer (2) is wedge metal thin slice and has ladder (21) on one side; Metal spacer (2) is fixed in waveguide cavity (3), and is positioned at the plane at waveguide cavity (3) radial center axis place; The base (22) of metal spacer (2) is concordant with input port (1), and the side (23) of metal spacer (2) agrees with the inwall of waveguide cavity (3).
2. the cavity circularly polarized device of wedge shape tapered waveguide according to claim 1, is characterized in that, the bore c of output port (4) meets:
λ
L/2<c<λ
H/1.414
λ
hrepresent the wavelength corresponding to high frequency value of working frequency range, λ
lrepresent the wavelength corresponding to low frequency value of working frequency range.
3. the cavity circularly polarized device of wedge shape tapered waveguide according to claim 2, is characterized in that, the thickness t value of metal spacer (2) is between 0.5 to 1.0 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020383.9A CN103730737B (en) | 2014-01-16 | 2014-01-16 | A kind of wedge shape gradual change waveguide cavity circular polarizer of compact conformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410020383.9A CN103730737B (en) | 2014-01-16 | 2014-01-16 | A kind of wedge shape gradual change waveguide cavity circular polarizer of compact conformation |
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| Publication Number | Publication Date |
|---|---|
| CN103730737A true CN103730737A (en) | 2014-04-16 |
| CN103730737B CN103730737B (en) | 2016-01-13 |
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|---|---|---|---|
| CN201410020383.9A Active CN103730737B (en) | 2014-01-16 | 2014-01-16 | A kind of wedge shape gradual change waveguide cavity circular polarizer of compact conformation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494485A (en) * | 2018-09-30 | 2019-03-19 | 安徽四创电子股份有限公司 | A kind of broadband partition circular polarizer |
Citations (10)
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| JPS5955601A (en) * | 1982-09-24 | 1984-03-30 | Sony Corp | Lagging element of 1/4 wavelength and switching device of dextrorotary-levorotatory circularly polarized wave |
| US5061037A (en) * | 1990-10-22 | 1991-10-29 | Hughes Aircraft Company | Dual septum polarization rotator |
| CN1387280A (en) * | 2001-05-17 | 2002-12-25 | 夏普公司 | Polarized wave saparating structure, radio wave receiving tansducer and antenna device |
| US6839037B1 (en) * | 1999-11-26 | 2005-01-04 | Channel Master Limited | Dual circular polarization waveguide system |
| JP2007329741A (en) * | 2006-06-08 | 2007-12-20 | Sharp Corp | Circle-linear polarization converter, satellite signal receiving converter, and antenna unit |
| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN203013935U (en) * | 2012-12-21 | 2013-06-19 | 中国航空工业第六○七研究所 | Circular polarization horn antenna used for W frequency range |
| CN203250835U (en) * | 2013-05-28 | 2013-10-23 | 零八一电子集团四川华昌电子有限公司 | Novel medium inserter-type circular polarizer |
| CN203367490U (en) * | 2013-02-26 | 2013-12-25 | 四川省视频电子有限责任公司 | High-efficient medium guiding paraboloid antenna |
-
2014
- 2014-01-16 CN CN201410020383.9A patent/CN103730737B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2076229A (en) * | 1980-05-01 | 1981-11-25 | Plessey Co Ltd | Improvements in or relating to apparatus for microwave signal processing |
| US4395685A (en) * | 1980-05-01 | 1983-07-26 | Plessey Overseas Limited | Waveguide junction for producing circularly polarized signal |
| JPS5955601A (en) * | 1982-09-24 | 1984-03-30 | Sony Corp | Lagging element of 1/4 wavelength and switching device of dextrorotary-levorotatory circularly polarized wave |
| US5061037A (en) * | 1990-10-22 | 1991-10-29 | Hughes Aircraft Company | Dual septum polarization rotator |
| US6839037B1 (en) * | 1999-11-26 | 2005-01-04 | Channel Master Limited | Dual circular polarization waveguide system |
| CN1387280A (en) * | 2001-05-17 | 2002-12-25 | 夏普公司 | Polarized wave saparating structure, radio wave receiving tansducer and antenna device |
| JP2007329741A (en) * | 2006-06-08 | 2007-12-20 | Sharp Corp | Circle-linear polarization converter, satellite signal receiving converter, and antenna unit |
| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN203013935U (en) * | 2012-12-21 | 2013-06-19 | 中国航空工业第六○七研究所 | Circular polarization horn antenna used for W frequency range |
| CN203367490U (en) * | 2013-02-26 | 2013-12-25 | 四川省视频电子有限责任公司 | High-efficient medium guiding paraboloid antenna |
| CN203250835U (en) * | 2013-05-28 | 2013-10-23 | 零八一电子集团四川华昌电子有限公司 | Novel medium inserter-type circular polarizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494485A (en) * | 2018-09-30 | 2019-03-19 | 安徽四创电子股份有限公司 | A kind of broadband partition circular polarizer |
| CN109494485B (en) * | 2018-09-30 | 2021-01-19 | 安徽四创电子股份有限公司 | Broadband baffle circular polarizer |
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| Publication number | Publication date |
|---|---|
| CN103730737B (en) | 2016-01-13 |
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