CN208272147U - A kind of four ridge waveguide circular polarizer of broadband - Google Patents
A kind of four ridge waveguide circular polarizer of broadband Download PDFInfo
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- CN208272147U CN208272147U CN201821064809.0U CN201821064809U CN208272147U CN 208272147 U CN208272147 U CN 208272147U CN 201821064809 U CN201821064809 U CN 201821064809U CN 208272147 U CN208272147 U CN 208272147U
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Abstract
The utility model discloses a kind of four ridge waveguide circular polarizers of broadband, belong to technical field of satellite communication.It includes square wave guide cavity, two vertical ridges and two horizontal ridges, and two vertical ridges are separately positioned on two opposite wave guide walls, and two horizontal ridges are separately positioned on other two wave guide wall.The utility model utilizes the broadband character of four ridge waveguides, make two pairs of orthogonal ridges height and width it is different, to change the propagation constant of two orthogonally polarized waves, according to the principle of circular polarizer, after constant amplitude passes through circular polarizer with two polarized waves of phase, the amplitude of two polarized waves is equal, and phase difference is 90 °, forms circular polarisation.Simultaneously, without load phase-shifting unit on ridge, there is no tooth slot structure, overcome the shortcomings that existing circular polarizer is not used to 1mm wave band, has the characteristics that L-band to W-waveband can be applied, working band is wide, excellent electrical properties, structure are simple, exempt from debugging, high reliablity, suitable for mass production.
Description
Technical field
The utility model discloses a kind of four ridge waveguide circular polarizers of broadband, it is related to satellite communication and radio astronomy antenna
Field, the feeding network system suitable for satellite communication and radio astronomy antenna.
Background technique
In fields such as satellite communication, radio astronomies, circular polarized antenna is widely used.Circular polarizer is used to line
Polarized signal is converted into circularly polarized signal, is the important component in circular polarized antenna.As communication technology of satellite and the next generation are penetrated
The development of electric astronomical telescope technology, the demand of broadband operation are more more and more urgent.Therefore, broadband circular polarizer technology is wide
One of key technology with circular polarisation reflecting plane aerial feed source.
Circular polarizer is the main component for determining antenna circular polarisation performance, and waveguide circular polarizer is in circular polarisation reflector antenna
It is widely adopted in feed system.Common waveguide circular polarizer pattern have screw adjustment type, medium insert type, ripple type, every
Template and ridge waveguide etc..Circular waveguide screw polarizer is that two rows of screws, screw circular polarisation are symmetrically inserted into circular waveguide tube wall
The cost of device is low, form is simple, insertion loss is small but debugging work load is big, and bandwidth is within 15%.Medium insert type polarizer
It is that dieelctric sheet is inserted into circular waveguide, the debugging of medium inserted sheet polarizer is simple, but dielectric loss is larger, and bandwidth is within 25%.Wave
Line type circular polarizer is that metal-loaded diaphragm is as phase-shifting unit in circular waveguide or square wave guide, and relative bandwidth can reach 35%, hardly possible
Point mainly requires height to the machining accuracy and symmetry of ripple, needs to increase debugging screw fine tuning phase.
Application No. is 201110198487.5 Chinese patents to disclose a kind of compact type ultra wide band polarizer, specially from this
As can be seen that its horizontal ridge on piece has tooth slot structure in the attached drawing of benefit.The circular polarizer can only be processed using the method for splicing,
The shortcomings that its precision is influenced by assembly, and the microsize presence of tooth slot structure can not process, thus it is dfficult to apply to 1mm
Millimere-wave band.
Utility model content
The purpose of this utility model is that avoiding the shortcoming in above-mentioned background technique and providing a kind of four ridge ripple of broadband
Rounding polarizer, structure is simple, exempts to debug, and can be used for L to W-waveband, opposite bandwidth of operation can reach 46%, can satisfy
The wide band applications of antennas such as reception are scouted in satellite communication, radio astronomy and broadband.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of four ridge waveguide circular polarizer of broadband, including square wave guide cavity, the square wave guide is intracavitary to set that there are two shape is identical
The vertical ridge being opposite to each other and the identical horizontal ridge being opposite to each other of two shapes, the two of the both ends of vertical ridge and horizontal ridge
End all has the ladder transition structure for impedance matching；The thickness of the vertical ridge is greater than the thickness of the horizontal ridge, described
The length of vertical ridge is less than the length of the horizontal ridge, both with respect to square wave guide cavity between two vertical ridges and between two horizontal ridges
Center be centrosymmetric, the ridge piece surface of vertical ridge and horizontal ridge is smooth.
Optionally, the length ratio of the vertical ridge and the horizontal ridge is 0.6~0.65:1, the length of the vertical ridge
Greater than 3 times of centre frequency free space wavelength.
Optionally, the ratio between thickness of the thickness of the vertical ridge and the horizontal ridge is 1.2~1.25:1, vertical ridge and water
The thickness of flat back is all larger than 0.1 times of centre frequency free space wavelength.
The utility model has the advantages that compared with prior art
1, the height of two pairs of orthogonal ridges and thickness are all different in the utility model, and four ridge waveguides thus constituted can change
The propagation constant for becoming two orthogonally polarized waves can make two polarized phase differences by optimizing the length and thickness of ridge
90 °, while amplitude is equal, to realize circular polarisation.
2, the bandwidth of the utility model is more than current most of circular polarizer bandwidth, and structure is simple, and ridge piece itself does not have
There is fine tooth slot structure, entire circular polarizer can be integrally machined molding, suitable for mass production.
3, it is different from the size of horizontal ridge mainly to make vertical ridge for the realization of the utility model phase shift function, and in ridge
Upper without load phase-shifting unit, in addition to the ladder transition of ridge, the shape of ridge is rectangle, does not contain tooth slot structure, is overcome existing
There is the shortcomings that circular polarizer is not used to 1mm wave band, can be applied in L-band to W-waveband, there is good applicability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram splitted in the utility model embodiment by vertical ridge.
Fig. 2 is the structural schematic diagram splitted in the utility model embodiment by horizontal ridge.
Fig. 3 is the standing wave of the vertical polarization of the utility model embodiment.
Fig. 4 is the standing wave of the horizontal polarization of the utility model embodiment.
Fig. 5 is two polarized transmission phase differences of the utility model embodiment.
Fig. 6 is the Circular polarization ratio of the utility model embodiment.
Fig. 7 is that application No. is the standing waves of 201110198487.5 Chinese patent " compact type ultra wide band polarizer ".
Fig. 8 is that application No. is 201110198487.5 Chinese patents " compact type ultra wide band polarizer " in K-band reality
Apply the Circular polarization ratio of example.
Fig. 9 is that application No. is 201110198487.5 Chinese patents " compact type ultra wide band polarizer " in Ka wave band reality
Apply the Circular polarization ratio of example.
In figure: square wave guide cavity -1, the first vertical ridge -2-1, the second vertical ridge -2-2, first level ridge -3-1, second
Horizontal ridge -3-2, vertical ridge ladder transition -4, horizontal ridge ladder transition -5.
Specific embodiment
The utility model is further explained in more detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1 to Fig. 3, a kind of four ridge waveguide circular polarizer of broadband comprising square wave guide cavity 1, the first vertical ridge 2-1,
The both ends of second vertical ridge 2-2, first level ridge 3-1, the second horizontal ridge 3-2, vertical ridge have vertical ridge ladder transition 4, water
The both ends of flat back have horizontal ridge ladder transition 5.First and second vertical ridges are separately positioned on two opposite wave guide walls, the
One and second horizontal ridge be separately positioned on other two wave guide wall.
Wherein, vertical ridge has different length and thickness from horizontal ridge.
Specifically, the length of vertical ridge is less than the length of horizontal ridge, and the ratio of vertical ridge and horizontal ridge length is substantially full
Sufficient 0.62:1, and vertical ridge length is greater than 3 λ (λ is center frequency free space wavelength).
The thickness of vertical ridge is greater than the thickness of horizontal ridge, and vertical ridge and the ratio of horizontal ridge thickness substantially meet 1.22:1,
Thickness generally takes greater than 0.1 λ.
Two vertical ridges and two horizontal ridges are centrosymmetric setting both with respect to the center of square wave guide cavity.
Vertical ridge and the ladder transition structure at horizontal ridge both ends are for realizing impedance matching.
The brief working principle of the utility model is as follows:
Line polarization wave can be analyzed to two constant amplitudes with the line polarization wave of phase；Circularly polarised wave is decomposed into that two amplitudes are equal, phase
The line polarization wave that potential difference is 90 °.When line polarization wave is inputted with two orthogonal ridge angles at 45 ° of circular polarizer by input port,
Two constant amplitudes be can be analyzed to the line polarization wave of phase, since the size of two pairs of ridges is different, the transmission phase of two line polarization waves is normal
Number is different, and after a certain distance, formation amplitude is equal, 90 ° of phase difference, forms circular polarisation in output port.
The electric transmission performance of above-mentioned circular polarizer is verified, specific as follows:
Fig. 3 gives the phase difference of two orthogonally polarized waves in frequency band, it can be seen that in 72GHz~120GHz, phase
Difference meets 90 ° ± 2.5 °.
Fig. 4 gives the corresponding Circular polarization ratio in frequency band, it can be seen that in 72GHz~120GHz, axis ratio <
0.4dB。
Fig. 5 gives the reflection loss of the vertical polarization in frequency band, it can be seen that in 72GHz~120GHz, vertical pole
Change standing wave < 1.15.
Fig. 6 gives the reflection loss of the horizontal polarization in frequency band, it can be seen that in 72GHz~120GHz, horizontal pole
Change standing wave < 1.16.
Fig. 7~9 show that application No. is 201110198487.5 Chinese patents " compact type ultra wide band polarizer "
Electric transmission performance.
By comparing as can be seen that compared with prior art, the structure of the utility model is simpler, can be integrally machined
Molding, not only can process realization in 1mm wave band, but also performance also has a distinct increment.
In short, the utility model utilizes the broadband character of four ridge waveguides, make two pairs of orthogonal ridges height and width it is each not
It is identical, to change the propagation constant of two orthogonally polarized waves, according to the principle of circular polarizer, when constant amplitude is the same as two polarized waves of phase
After circular polarizer, the amplitude of two polarized waves is equal, and phase difference is 90 °, forms circular polarisation.Meanwhile it not being loaded on ridge
Phase-shifting unit, in addition to the ladder transition of ridge, the shape of ridge is rectangle, does not have tooth slot structure on ridge, overcomes existing circular polarisation
Device is not used to the shortcomings that 1mm wave band, has L-band to W-waveband can be applied, working band is wide, excellent electrical properties, knot
Structure is simple, exempts from debugging, high reliablity, feature suitable for mass production.
It should be pointed out that the above specific embodiment is the specific case of this patent implementation, without also can not
All implementations of this patent can be covered, therefore the restriction to the scope of this patent cannot be regarded as；All and above case
Belong to the implementation of same idea or the assembled scheme of above-mentioned several schemes, within the protection domain of this patent..
Claims (3)
1. a kind of four ridge waveguide circular polarizer of broadband, including square wave guide cavity, the square wave guide is intracavitary to set that there are two shape is identical
The vertical ridge being opposite to each other and the identical horizontal ridge being opposite to each other of two shapes, the both ends at the both ends of vertical ridge and horizontal ridge
All have the ladder transition structure for impedance matching；It is characterized by: the thickness of the vertical ridge is greater than the horizontal ridge
Thickness, the length of the vertical ridge are less than the length of the horizontal ridge, opposite between two vertical ridges and between two horizontal ridges
It is centrosymmetric in the center of square wave guide cavity, the ridge piece surface of vertical ridge and horizontal ridge is smooth.
2. four ridge waveguide circular polarizer of a kind of broadband according to claim 1, it is characterised in that: the vertical ridge with it is described
The length ratio of horizontal ridge is 0.6~0.65:1, and the length of the vertical ridge is greater than 3 times of centre frequency free space wavelength.
3. four ridge waveguide circular polarizer of a kind of broadband according to claim 1, it is characterised in that: the thickness of the vertical ridge
It is 1.2~1.25:1 with the ratio between the thickness of the horizontal ridge, it is freely empty that the thickness of vertical ridge and horizontal ridge is all larger than centre frequency
Between 0.1 times of wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064809.0U CN208272147U (en) | 2018-07-06 | 2018-07-06 | A kind of four ridge waveguide circular polarizer of broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064809.0U CN208272147U (en) | 2018-07-06 | 2018-07-06 | A kind of four ridge waveguide circular polarizer of broadband |
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| CN208272147U true CN208272147U (en) | 2018-12-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808262A (en) * | 2018-07-06 | 2018-11-13 | 中国电子科技集团公司第五十四研究所 | A kind of four ridge waveguide circular polarizer of broadband |
| CN111525233A (en) * | 2020-05-08 | 2020-08-11 | 北京中微普业科技有限公司 | Small-size dual polarized antenna |
-
2018
- 2018-07-06 CN CN201821064809.0U patent/CN208272147U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808262A (en) * | 2018-07-06 | 2018-11-13 | 中国电子科技集团公司第五十四研究所 | A kind of four ridge waveguide circular polarizer of broadband |
| CN111525233A (en) * | 2020-05-08 | 2020-08-11 | 北京中微普业科技有限公司 | Small-size dual polarized antenna |
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