CN104934672A - Novel broadband coaxial waveguide orthomode coupler based on turnstile structure - Google Patents
Novel broadband coaxial waveguide orthomode coupler based on turnstile structure Download PDFInfo
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- CN104934672A CN104934672A CN201510357037.4A CN201510357037A CN104934672A CN 104934672 A CN104934672 A CN 104934672A CN 201510357037 A CN201510357037 A CN 201510357037A CN 104934672 A CN104934672 A CN 104934672A
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Abstract
The invention relates to a novel broadband coaxial waveguide orthomode coupler based on a turnstile structure. The novel broadband coaxial waveguide orthomode coupler comprises the turnstile structure, two power synthesizers or distributors or two impedance transformers, wherein the turnstile structure comprises a coaxial waveguide, an impedance matching structure and a coupling rectangular waveguide; each of the power synthesizers or distributors comprises a bent waveguide and a three-port cavity structure; and the impedance transformers are fifth-order rectangular waveguide step gradual-changing structures. According to the novel broadband coaxial waveguide orthomode coupler, the orthogonalp polar signal coupling problem in a coaxial feed waveguide in a multi-frequency satellite communication antenna system, and the broadband working characteristic problem of the coaxial waveguide orthomode coupler are solved, and the orthogonal signal coupling function requirements within dual receiving and sending frequency bands of a Ku-frequency-band satellite communication feed source antenna can be satisfied.
Description
Technical field
The present invention relates to a kind of Wideband coaxial waveguide orthomode coupler based on turnsile structure.
Background technology
In satellite communication system, multifrequency antenna can improve communication capacity, reduce ground station build cost, be therefore widely used.For the design of satellite communication feed antenna, when multipolarization mode of operation is required, generally orthomode coupler need be connected after Feed Horn.Part feed antenna owing to considering the index request such as multiple-frequency operation, receive-transmit isolation, can adopt coaxial waveguide feed structure in the design process; Now, the public port of orthomode coupler also should be coaxial waveguide port.The design of coaxial waveguide orthomode coupler is little, does not almost have the example that can realize ultrabroad band operating characteristic.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the deficiencies in the prior art, the present invention proposes a kind of coaxial waveguide orthomode coupler based on turnsile structure, by reasonably layout turnsile structure, power combiner/distributor, impedance transformer etc., achieve the coaxial waveguide orthomode coupler design of compact conformation, ensure its index request such as high reverse--bias loss, high port isolation in superwide range simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: comprise turnsile structure, power combiner or distributor and impedance transformer, described turnsile structure comprises coaxial waveguide, impedance matching structure and coupling rectangular waveguide, described coaxial waveguide is connected with coupling rectangular waveguide by impedance matching structure, described power combiner or distributor and impedance transformer have two respectively, described power combiner or distributor comprise waveguide bend and three port cavity body structures, described waveguide bend is connected with coupling rectangular waveguide, three ports of described three port cavity body structures comprise two I/O rectangular waveguide ports and an input/output rectangular waveguide port, described I/O rectangular waveguide port is connected with coupling rectangular waveguide, described input/output rectangular waveguide port is connected with impedance transformer.
As preferably, described coaxial waveguide comprises interior metal post and external metallization pipe, the bottom of described interior metal post is impedance matching structure, the bottom of described external metallization pipe differs 90 ° of 4 coupling rectangular waveguides of arranging respectively and is connected with axial direction, short circuit metallic wall electrical connection bottom the bottom of described interior metal post and external metallization pipe, the central shaft of described interior metal post and external metallization pipe overlaps, and the narrow limit of described coupling rectangular waveguide is parallel with the central shaft of coaxial waveguide.
As preferably, the sectional dimension of described coupling rectangular waveguide is 14.0 × 2.4 mm2.
As preferably, the epitaxial part of described coupling rectangular waveguide is 90 ° of waveguide bends with ladder grading structure.
As preferably, the sectional dimension of the input/output port of described power combiner or distributor is 14.0 × 4.8mm
2.
As preferably, waveguide bend is 90 ° of waveguide bends.
As preferably, described impedance transformer becomes large rectangular waveguide gradually by 5 sections of sectional dimensions and is formed by connecting, and the central shaft of 5 sections of rectangular waveguides overlaps, and the sectional dimension of the rectangular waveguide that size is minimum is 14.0 × 4.8mm
2, the sectional dimension of the rectangular waveguide that size is maximum is 15.8 × 7.9mm
2.
The invention has the beneficial effects as follows, broadband coaxial waveguide orthomode coupler of the present invention, effectively can reducing the excitation of higher mode in coaxial waveguide, by adopting turnsile structure, the high reverse--bias loss in superwide range, high port isolation characteristic can be realized.Through links such as simulation optimization tests, the coupler performance result obtained is as follows: within the scope of 12.3-16.2GHz, and the reflection coefficient of 2 input/output rectangular waveguide ports is less than-18dB, and interport isolation is greater than 55dB, compact conformation, is easy to be integrated in feed antenna system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention;
Fig. 2 is the front view of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention;
Fig. 3 is power combiner or the dispensing arrangement schematic diagram of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention;
Fig. 4 is the rheostatic structural representation of impedance of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention;
Fig. 5 is the reflection coefficient of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention at 12-18GHz;
Fig. 6 is the interport isolation of the Wideband coaxial waveguide orthomode coupler based on turnsile structure of the present invention at 12-18GHz.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
As shown in figures 1 to 6, a kind of Wideband coaxial waveguide orthomode coupler based on turnsile structure, comprise turnsile structure 1, power combiner or distributor 2 and impedance transformer 3, described turnsile structure 1 comprises coaxial waveguide 4, impedance matching structure 5 and coupling rectangular waveguide 6, described coaxial waveguide 4 is connected with coupling rectangular waveguide 6 by impedance matching structure 5, described power combiner or distributor 2 and impedance transformer 3 have two respectively, described power combiner or distributor 2 comprise waveguide bend 7 and three port cavity body structures 8, described waveguide bend 7 is connected with coupling rectangular waveguide 6, three ports of described three port cavity body structures 8 comprise two I/O rectangular waveguide ports 9 and an input/output rectangular waveguide port one 0, described I/O rectangular waveguide port 9 is connected with coupling rectangular waveguide 6, described input/output rectangular waveguide port one 0 is connected with impedance transformer 3.
As preferably, described coaxial waveguide 4 comprises interior metal post 11 and external metallization pipe 12, the bottom of described interior metal post 11 is impedance matching structure 5, the bottom of described external metallization pipe 12 differs 90 ° of 4 coupling rectangular waveguides 6 of arranging respectively and is connected with axial direction, short circuit metallic wall electrical connection bottom the bottom of described interior metal post 11 and external metallization pipe 12, the central shaft of described interior metal post 11 and external metallization pipe 12 overlaps, and the narrow limit of described coupling rectangular waveguide 6 is parallel with the central shaft of coaxial waveguide 4.
As preferably, the sectional dimension of described coupling rectangular waveguide 6 is 14.0 × 2.4 mm2.
As preferably, the epitaxial part of described coupling rectangular waveguide 6 is 90 ° of waveguide bends 13 with ladder grading structure.
As preferably, the sectional dimension of the input/output port 9 of described power combiner or distributor 2 is 14.0 × 4.8mm
2.
As preferably, waveguide bend 7 is 90 ° of waveguide bends.
As preferably, described impedance transformer 3 becomes large rectangular waveguide gradually by 5 sections of sectional dimensions and is formed by connecting, and the central shaft of 5 sections of rectangular waveguides overlaps, and the sectional dimension of the rectangular waveguide that size is minimum is 14.0 × 4.8mm
2, the sectional dimension of the rectangular waveguide that size is maximum is 15.8 × 7.9mm
2.
Orthomode coupler is the critical component realizing duplexer dual polarization function, is generally 3 port waveguiding structures, comprises 2 public input/output end ports 9 and 1 input/output port one 0.Can transmit orthogonally polarized signal (horizontal polarization/perpendicular polarization) in public passage, and orthomode coupler is exactly be separated by the orthogonally polarized signal in public passage by reasonably designing, thus realizes polarization isolation.
Further, described power combiner and power divider have different effects, the corresponding accepting state of described power combiner, the corresponding emission state of described power divider.
Further, WR62 standard waveguide belongs to GB, as selected interface shape, can directly connect other waveguide devices or tuner thereafter.
Embodiment 1:
After orthomode coupler is positioned in transmit-receive sharing feed antenna usually.For receiving mode, feed antenna receives any polarized signal, and then transmits in feed waveguide.The latter linked orthomode coupler of feed waveguide, can carry out polarization isolation by the signal in feed waveguide, thus obtain two-way orthogonal signalling; For emission mode, certain excitation can be added at 2 input/output end port 9 places, corresponding orthogonal polarization radiation respectively, two paths of signals enters public passage simultaneously, and then enter feed waveguide and feed antenna, be radiated to free space, different energisation mode is corresponding different aerial radiation polarization characteristic.
Specific embodiment 2:
The main test index of orthomode coupler is reflection coefficient and the isolation therebetween at 2 input/output port 9 places.Carrying out in test process, 2 input/output ports 9 need be connected with two test ports of vector network analyzer respectively, and public coaxial waveguide 4 port connects the Broadband Matching load that can cover Ku frequency range, thus test, as shown in Figure 5 and Figure 6, compact conformation, is easy to be integrated in feed antenna system.
Compared with prior art, broadband coaxial waveguide orthomode coupler of the present invention, effectively can reducing the excitation of higher mode in coaxial waveguide, by adopting turnsile structure, the high reverse--bias loss in superwide range, high port isolation characteristic can be realized.Through links such as simulation optimization tests, the coupler performance result obtained is as follows: within the scope of 12.3-16.2GHz, and the reflection coefficient of 2 input/output rectangular waveguide ports is less than-18dB, and interport isolation is greater than 55dB, compact conformation, is easy to be integrated in feed antenna system.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (7)
1. the Wideband coaxial waveguide orthomode coupler based on turnsile structure, it is characterized in that: comprise turnsile structure, power combiner or distributor and impedance transformer, described turnsile structure comprises coaxial waveguide, impedance matching structure and coupling rectangular waveguide, described coaxial waveguide is connected with coupling rectangular waveguide by impedance matching structure, described power combiner or distributor and impedance transformer have two respectively, described power combiner or distributor comprise waveguide bend and three port cavity body structures, described waveguide bend is connected with coupling rectangular waveguide, three ports of described three port cavity body structures comprise two I/O rectangular waveguide ports and an input/output rectangular waveguide port, described I/O rectangular waveguide port is connected with coupling rectangular waveguide, described input/output rectangular waveguide port is connected with impedance transformer.
2. the Wideband coaxial waveguide orthomode coupler based on turnsile structure as described in claim 1, it is characterized in that: described coaxial waveguide comprises interior metal post and external metallization pipe, the bottom of described interior metal post is impedance matching structure, the bottom of described external metallization pipe differs 90 ° of 4 coupling rectangular waveguides of arranging respectively and is connected with axial direction, short circuit metallic wall electrical connection bottom the bottom of described interior metal post and external metallization pipe, the central shaft of described interior metal post and external metallization pipe overlaps, the narrow limit of described coupling rectangular waveguide is parallel with the central shaft of coaxial waveguide.
3., as claimed in claim 1 based on the Wideband coaxial waveguide orthomode coupler of turnsile structure, it is characterized in that: the sectional dimension of described coupling rectangular waveguide is 14.0 × 2.4 mm2.
4. the Wideband coaxial waveguide orthomode coupler based on turnsile structure as described in claim 1, is characterized in that: the epitaxial part of described coupling rectangular waveguide is 90 ° of waveguide bends with ladder grading structure.
5. the Wideband coaxial waveguide orthomode coupler based on turnsile structure as described in claim 1, is characterized in that: the sectional dimension of the input/output port of described power combiner or distributor is 14.0 × 4.8mm
2.
6. the Wideband coaxial waveguide orthomode coupler based on turnsile structure as described in claim 1, is characterized in that: waveguide bend is 90 ° of waveguide bends.
7. the Wideband coaxial waveguide orthomode coupler based on turnsile structure as described in claim 1, it is characterized in that: described impedance transformer becomes large rectangular waveguide gradually by 5 sections of sectional dimensions and is formed by connecting, the central shaft of 5 sections of rectangular waveguides overlaps, and the sectional dimension of the rectangular waveguide that size is minimum is 14.0 × 4.8mm
2, the sectional dimension of the rectangular waveguide that size is maximum is 15.8 × 7.9mm
2.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206910A (en) * | 2015-10-10 | 2015-12-30 | 中国电子科技集团公司第五十四研究所 | Ka wide band ortho-mode coupler |
| CN106410349A (en) * | 2016-10-26 | 2017-02-15 | 中国科学院新疆天文台 | Q-waveband ridge transition ortho-mode transducer |
| CN106410354A (en) * | 2016-10-26 | 2017-02-15 | 中国科学院新疆天文台 | Q-band partition board type orthogonal-mode coupler |
| CN106450759A (en) * | 2016-10-17 | 2017-02-22 | 中国电子科技集团公司第五十四研究所 | Compact linear polarization tracker |
| CN107978832A (en) * | 2017-12-18 | 2018-05-01 | 中国电子科技集团公司第五十四研究所 | A kind of broadband coaxial waveguide coupler |
| CN108123202A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of broadband equiphase exports orthomode coupler |
| CN108123201A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of coaxial waveguide orthomode coupler |
| CN108123200A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of multifrequency feed network based on coaxial turnsile coupler |
| CN108123199A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | The coaxial waveguide orthomode coupler of step is arranged at a kind of bottom |
| CN108199790A (en) * | 2017-11-29 | 2018-06-22 | 西安空间无线电技术研究所 | The waveguide test system and test method of a kind of passive intermodulation of metal net performance |
| CN109473772A (en) * | 2018-12-28 | 2019-03-15 | 四川睿迪澳科技有限公司 | Dual polarization ultra-wideband antenna |
| CN110380161A (en) * | 2019-07-23 | 2019-10-25 | 广东盛路通信科技股份有限公司 | A kind of OMT of the microwave frequency band of coaxial waveguide structure |
| CN115064856A (en) * | 2022-05-12 | 2022-09-16 | 中国电子科技集团公司第五十四研究所 | W-waveband self-tracking mode coupler |
| CN115207583A (en) * | 2022-06-30 | 2022-10-18 | 深圳大学 | Waveguide orthogonal mode converter |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206910B (en) * | 2015-10-10 | 2018-02-13 | 中国电子科技集团公司第五十四研究所 | Ka broadband orthomode couplers |
| CN105206910A (en) * | 2015-10-10 | 2015-12-30 | 中国电子科技集团公司第五十四研究所 | Ka wide band ortho-mode coupler |
| CN106450759A (en) * | 2016-10-17 | 2017-02-22 | 中国电子科技集团公司第五十四研究所 | Compact linear polarization tracker |
| CN106450759B (en) * | 2016-10-17 | 2023-06-13 | 中国电子科技集团公司第五十四研究所 | Compact linear polarization tracker |
| CN106410349A (en) * | 2016-10-26 | 2017-02-15 | 中国科学院新疆天文台 | Q-waveband ridge transition ortho-mode transducer |
| CN106410354A (en) * | 2016-10-26 | 2017-02-15 | 中国科学院新疆天文台 | Q-band partition board type orthogonal-mode coupler |
| CN106410349B (en) * | 2016-10-26 | 2019-05-14 | 中国科学院新疆天文台 | A kind of Q-band ridge transition orthomode coupler |
| CN106410354B (en) * | 2016-10-26 | 2018-10-26 | 中国科学院新疆天文台 | A kind of Q-band barrier type orthomode coupler |
| CN108199790A (en) * | 2017-11-29 | 2018-06-22 | 西安空间无线电技术研究所 | The waveguide test system and test method of a kind of passive intermodulation of metal net performance |
| CN107978832A (en) * | 2017-12-18 | 2018-05-01 | 中国电子科技集团公司第五十四研究所 | A kind of broadband coaxial waveguide coupler |
| CN108123199A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | The coaxial waveguide orthomode coupler of step is arranged at a kind of bottom |
| CN108123200A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of multifrequency feed network based on coaxial turnsile coupler |
| CN108123201A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of coaxial waveguide orthomode coupler |
| CN108123202A (en) * | 2017-12-18 | 2018-06-05 | 中国电子科技集团公司第五十四研究所 | A kind of broadband equiphase exports orthomode coupler |
| CN109473772A (en) * | 2018-12-28 | 2019-03-15 | 四川睿迪澳科技有限公司 | Dual polarization ultra-wideband antenna |
| CN109473772B (en) * | 2018-12-28 | 2024-03-26 | 四川睿迪澳科技有限公司 | Dual polarized ultra wideband antenna |
| CN110380161A (en) * | 2019-07-23 | 2019-10-25 | 广东盛路通信科技股份有限公司 | A kind of OMT of the microwave frequency band of coaxial waveguide structure |
| CN115064856A (en) * | 2022-05-12 | 2022-09-16 | 中国电子科技集团公司第五十四研究所 | W-waveband self-tracking mode coupler |
| CN115207583A (en) * | 2022-06-30 | 2022-10-18 | 深圳大学 | Waveguide orthogonal mode converter |
| CN115207583B (en) * | 2022-06-30 | 2023-06-06 | 深圳大学 | Waveguide quadrature mode converter |
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