CN203423238U - Ka/S dual-frequency dual-path rotary joint - Google Patents
Ka/S dual-frequency dual-path rotary joint Download PDFInfo
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- CN203423238U CN203423238U CN201320566060.0U CN201320566060U CN203423238U CN 203423238 U CN203423238 U CN 203423238U CN 201320566060 U CN201320566060 U CN 201320566060U CN 203423238 U CN203423238 U CN 203423238U
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- rotary joint
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- waveguide
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Abstract
The utility model relates to a Ka/S dual-frequency dual-path rotary joint. In the airborne sitcom on the move satellite communication system provided with a rotary antenna, the antenna is required to rotate 360 DEG in the direction and rotates +/- 90DEG in pitching. The Ka/S dual-frequency dual-path rotary joint comprises a Ka-band waveguide rotary joint and an S-band coaxial rotary joint connected in a mutual nesting mode. A standard rectangular waveguide, an E-plane mitered corner waveguide, a deployment cone, a coaxial cavity and a choke are sequentially and symmetrically arranged on the Ka-band waveguide rotary joint from two sides to the center; and SMA coaxial connectors and a rigid cable are sequentially and symmetrically arranged on the S-band waveguide rotary joint from two sides to the center. According to the Ka/S dual-frequency dual-path rotary joint, design optimization is carried out on parameters of the Ka-band waveguide rotary joint and the S-band coaxial rotary joint respectively, simultaneous work of the Ka band channel and the S band channel is realized on the premise that the required normal work bands are ensured, appearance of high-order mode is restrained, and insertion loss and return loss caused by the rotary joint is effectively reduced.
Description
Technical field
the utility model relates to a kind of rotary joint, is specifically related to a kind of Ka, S double frequency two-way rotary joint.
Background technology
In thering is the airborne satellite communications system of rotable antenna, on the one hand for high-frequency energy is transferred on rotary antenna by stationary transmitter, in order to meet antenna, constantly search at work target on the other hand, the needs of tracking target, often require antenna 360 ° of rotations of energy in orientation, energy ± 90 ° of rotations in pitching, at this moment just must install waveguide junction or Coaxial rotary joint between network and feed, in the process that assurance microwave signal is rotated at antenna, can effectively transmit.Rotary joint is used in a large number in radar installations.
The type of rotary joint is a lot, conventional type has complete coaxial line style rotary joint, using coaxial line as the rotary joint of transition, using circular waveguide as the rotary joint of transition etc.Requirement to them is:
(1) in structure, rotate flexibly;
(2) while rotating, do not affect the transmission of electromagnetic energy between feeder line and antenna, generally in working frequency range below VSWR≤1.25;
(3) insertion loss is little, generally in working frequency range below IL≤0.3dB;
(4) can bear certain peak power and average power
If transmission channel needs inflation, in the part position of rotary joint, need to install sealing mechanism additional, should prevent that gas leakage from guarantee rotating flexibly again, such as waveguide hermetyic window etc.
Summary of the invention
The purpose of this utility model is to provide a kind of Ka, S double frequency two-way rotary joint, the convenient transmission of the signal in Ka band communication field.
The technical scheme that the utility model adopts is:
, a S double frequency two-way rotary joint, it is characterized in that:
Include Ka wave band waveguide junction and S-band Coaxial rotary joint;
Described Ka wave band waveguide junction is symmetrically arranged with successively standard rectangular waveguide, E face corner cut waveguide bend, allotment cone, coaxial cavity and choke groove from both sides to central authorities;
Described S-band Coaxial rotary joint is symmetrically arranged with successively SMA coaxial connector and rigid cable from both sides to central authorities;
The rigid cable of S-band Coaxial rotary joint is plugged in the coaxial cavity of Ka wave band waveguide junction.
The allotment cone of described Ka wave band waveguide junction is regular cone or taper stairstepping.
The rigid cable of described S-band Coaxial rotary joint is comprised of Inner conductor, medium socket, outer conductor.
The coaxial cavity size of described Ka wave band waveguide junction meets λ
min>=3.14 * (a+b), wherein a represents the external diameter of inner wire, b represents the internal diameter of outer conductor, λ
minrepresent the minimum wavelength in working frequency range;
The coaxial cavity of Ka wave band waveguide junction, if desired, by larger power capacity, the size condition of its coaxial cavity is b/a=1.649; If require transmission channel decay minimum, the size condition of its coaxial cavity is b/a=3.591.
The utlity model has following advantage:
The utility model has carried out respectively design optimization to the parameter of Ka wave band waveguide junction and S-band Coaxial rotary joint, guaranteeing under the prerequisite of desired normal operation frequency band, realize Ka waveband channels and S-band passage can be worked simultaneously, suppress the appearance of higher mode, also insertion loss and the return loss of rotary joint passband have effectively been reduced, reduce the volume of whole two-way rotary joint, realize the function of double frequency two-way rotary joint requirement, and be applicable to the fields such as microwave communication, microwave test and radar.
The utility model adopts Ka wave band waveguide single channel rotary joint and the nested compound mode of the coaxial single channel rotary joint of S-band, its feature is that waveguide single channel rotary joint and coaxial single channel rotation pass share one section of transmission line, have reduced the volume of whole rotary joint widely.In order to guarantee the normal rotation of waveguide channels and coaxial channel, at waveguide channels, adopt respectively the form of choke groove, at coaxial channel, adopt the form of contact friction.
Accompanying drawing explanation
Fig. 1 is that the utility model is specifically implemented Ka, S double frequency two-way rotary joint side-looking structure chart.
Fig. 2 is the sectional structure chart that the utility model is specifically implemented Ka wave band waveguide single channel rotary joint.
Fig. 3 is the sectional structure chart that the utility model is specifically implemented the coaxial single channel rotary joint of S-band.
In figure, 1-Ka wave band waveguide junction, 2-S wave band Coaxial rotary joint, the waveguide of 11-standard rectangular, 12-E face corner cut waveguide bend, 13-allocates cone, 14-coaxial cavity, 15-choke groove, 21-SMA coaxial connector, 22-coaxial rigid cable.
Embodiment
Below in conjunction with embodiment, the utility model is described in detail.
Ka described in the utility model, S double frequency two-way rotary joint, include Ka wave band waveguide junction 1 and the S-band Coaxial rotary joint 2 of mutually nested connection.
Ka wave band waveguide junction 1 has the good broad passband of coupling, reflects littlely, and loss is low, and volume is little.Can use separately, main version has I type, L-type and U-shaped three kinds, also can realize multiple-channel ratation joint with low-frequency range waveguide combination.Ka wave band waveguide junction 1 is symmetrically arranged with successively standard rectangular waveguide 11, E face corner cut waveguide bend 12, allotment hammer 13, coaxial cavity 14 and choke groove 15 from both sides to central authorities.The version of allotment cone 13 can be also rectangle stepped-style.In order to guarantee 14 transmission TEM moulds of coaxial cavity, the selection of its size must meet λ
min>=3.14 * (a+b), wherein a represents the external diameter of inner wire, b represents the internal diameter of outer conductor, λ
minrepresent the minimum wavelength in working frequency range.If require transmission channel decay minimum, the size condition of its coaxial cavity (14) is b/a=3.591, if desired by larger power capacity, the size condition of its coaxial cavity (14) is b/a=1.649, in order further to strengthen the power that bears of waveguide junction, also can do suitable chamfered in the junction of coaxial cavity and square wave guide cavity.For rotary joint can be rotated smoothly, in the end of the upper and lower linking of coaxial cavity, make choke groove.
S-band Coaxial rotary joint 2 has very wide bandwidth of operation, and in the situation that making precision is higher, it can almost not detect reflection power in 30% bandwidth, but its power capacity is lower.S-band Coaxial rotary joint 2 is symmetrically arranged with successively SMA coaxial connector 21 and coaxial rigid cable 22 from both sides to central authorities.Coaxial rigid cable 22 plays a part very crucial for whole two-way rotary joint, it takes on the role of coaxial cavity Inner conductor for waveguide channels, takes on the role of coaxial outer conductor for coaxial channel.While particularly using as the Inner conductor of coaxial cavity, its surface smoothness, concentricity are very important, if size has problem just easily to evoke the higher mode TE11 mould of coaxial line.The design of coaxial rigid cable 22 rotating parts is an emphasis, difficult points of this product design, what in rocking link, we adopted is contact scheme, for fear of the slot-coupled between coaxial rotation part and waveguide choke groove, the rotation contact portion of Coaxial rotary joint is placed on to the outside of waveguide channels for we and the choke groove of waveguide junction is separated.Coaxial line rotary joint generally all adopts and directly cuts off coaxial line, so that it relatively rotates, because coaxial line internal and external conductor is cut off, for keeping electrical characteristic contact good, at cut-off part, must use choke.Choosing on the one hand of coaxial line length will be considered the restriction of whole system to the size of rotary joint, will make on the other hand the reflection of two coaxial connectors repeal by implication, thereby makes joint minimum at bandwidth of operation standing internal wave.The long meeting of coaxial line makes volume become large, and working band narrows down; The higher mode that the too short meeting of coaxial line produces at transitional region can not get decay, in coaxial line, when high order model TE11 ripple when wavelength is less than operation wavelength, TE11 ripple will be attenuated.If TE11 wave attenuation is inadequate, synthetic electromagnetic field is along the circumferential direction inhomogeneous, and this can cause the decline of coaxial line power capacity, and when joint rotates, matching performance also will change.In order to eliminate above-mentioned hidden danger, obtain good electrical property, we adopt the conversion of contact mode impedance this scheme, allow coaxial line Inner conductor and lock pin combine closely, and adopt special material as friction means, reduce the loss being brought by friction as far as possible.
The rigid cable 22 of S-band Coaxial rotary joint 2 is plugged in the coaxial cavity 14 of Ka wave band waveguide junction 1, makes the two form mutually nested annexation.Ka, S double frequency two-way rotary joint are divided into two parts by integral body, and the first half is rotated, and the latter half maintains static.S passage and Ka passage all respectively have two ports.If survey Ka passage when test, Ka single channel to be used as to waveguide dual-port device and to measure, the S parameter of surveying is mainly S11 and S21, and observation test data judge whether to realize the function of this two-way rotary joint requirement.
It is cited that content of the present utility model is not limited to embodiment, and the conversion of any equivalence that those of ordinary skills take technical solutions of the utility model by reading the utility model specification, is claim of the present utility model and contains.
Claims (4)
1. Ka, a S double frequency two-way rotary joint, is characterized in that:
Include Ka wave band waveguide junction (1) and S-band Coaxial rotary joint (2);
Described Ka wave band waveguide junction (1) is symmetrically arranged with successively standard rectangular waveguide (11), E face corner cut waveguide bend (12), allotment cone (13), coaxial cavity (14) and choke groove (15) from both sides to central authorities;
Described S-band Coaxial rotary joint (2) is symmetrically arranged with successively SMA coaxial connector (21) and rigid cable (22) from both sides to central authorities;
The rigid cable (22) of S-band Coaxial rotary joint (2) is plugged in the coaxial cavity (14) of Ka wave band waveguide junction (1).
2. a kind of Ka according to claim 1, S double frequency two-way rotary joint, is characterized in that:
The allotment cone (13) of described Ka wave band waveguide junction (1) is regular cone or taper stairstepping.
3. a kind of Ka according to claim 1 and 2, S double frequency two-way rotary joint, is characterized in that:
The rigid cable (22) of described S-band Coaxial rotary joint (2) is comprised of Inner conductor, medium socket, outer conductor.
4. a kind of Ka according to claim 3, S double frequency two-way rotary joint, is characterized in that:
Coaxial cavity (14) size of described Ka wave band waveguide junction (1) meets λ
min>=3.14 * (a+b), wherein a represents the external diameter of inner wire, b represents the internal diameter of outer conductor, λ
minrepresent the minimum wavelength in working frequency range;
The coaxial cavity (14) of Ka wave band waveguide junction (1), if desired, by larger power capacity, the size condition of its coaxial cavity (14) is b/a=1.649; If require transmission channel decay minimum, the size condition of its coaxial cavity (14) is b/a=3.591.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320566060.0U CN203423238U (en) | 2013-09-12 | 2013-09-12 | Ka/S dual-frequency dual-path rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320566060.0U CN203423238U (en) | 2013-09-12 | 2013-09-12 | Ka/S dual-frequency dual-path rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203423238U true CN203423238U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320566060.0U Expired - Lifetime CN203423238U (en) | 2013-09-12 | 2013-09-12 | Ka/S dual-frequency dual-path rotary joint |
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| CN (1) | CN203423238U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025449A (en) * | 2016-07-26 | 2016-10-12 | 中国船舶重工集团公司第七二四研究所 | Suitable multichannel nested airtight high-power microwave rotating hinge and realization method thereof |
| CN106450592A (en) * | 2016-12-02 | 2017-02-22 | 中国船舶重工集团公司第七二四研究所 | High-power rotary hinge based on waveguide distributors and implementation method of high-power rotary hinge |
| CN106935941A (en) * | 2017-03-06 | 2017-07-07 | 京航泰（北京）科技有限公司 | Double-channel coaxial rotary joint |
| CN111224199A (en) * | 2020-01-08 | 2020-06-02 | 中国船舶重工集团公司第七二四研究所 | Ka and Ku wave band double-channel rotary joint |
| CN114839448A (en) * | 2022-04-15 | 2022-08-02 | 电子科技大学 | High-power microwave on-line measuring device based on choking coupling structure |
-
2013
- 2013-09-12 CN CN201320566060.0U patent/CN203423238U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025449A (en) * | 2016-07-26 | 2016-10-12 | 中国船舶重工集团公司第七二四研究所 | Suitable multichannel nested airtight high-power microwave rotating hinge and realization method thereof |
| CN106450592A (en) * | 2016-12-02 | 2017-02-22 | 中国船舶重工集团公司第七二四研究所 | High-power rotary hinge based on waveguide distributors and implementation method of high-power rotary hinge |
| CN106450592B (en) * | 2016-12-02 | 2021-08-17 | 中国船舶重工集团公司第七二四研究所 | High-power rotary hinge based on waveguide distributor and implementation method thereof |
| CN106935941A (en) * | 2017-03-06 | 2017-07-07 | 京航泰（北京）科技有限公司 | Double-channel coaxial rotary joint |
| CN106935941B (en) * | 2017-03-06 | 2022-05-13 | 京航泰（北京）科技有限公司 | Double-channel coaxial rotary joint |
| CN111224199A (en) * | 2020-01-08 | 2020-06-02 | 中国船舶重工集团公司第七二四研究所 | Ka and Ku wave band double-channel rotary joint |
| CN111224199B (en) * | 2020-01-08 | 2021-07-06 | 中国船舶重工集团公司第七二四研究所 | Ka and Ku wave band double-channel rotary joint |
| CN114839448A (en) * | 2022-04-15 | 2022-08-02 | 电子科技大学 | High-power microwave on-line measuring device based on choking coupling structure |
| CN114839448B (en) * | 2022-04-15 | 2023-05-02 | 电子科技大学 | High-power microwave on-line measuring device based on choke coupling structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 10, Astronautics Hotel, 493 South Changan Road, Shaanxi, Xi'an, 710061 Patentee after: Shaanxi Aerospace Technology Application Research Institute Co.,Ltd. Address before: 10, Astronautics Hotel, 493 South Changan Road, Shaanxi, Xi'an, 710061 Patentee before: Xi'an Aerospace Star Technology Industry (Group) Co.,Ltd. Address after: 10, Astronautics Hotel, 493 South Changan Road, Shaanxi, Xi'an, 710061 Patentee after: Xi'an Aerospace Star Technology Industry (Group) Co.,Ltd. Address before: 10, Astronautics Hotel, 493 South Changan Road, Shaanxi, Xi'an, 710061 Patentee before: XI'AN SPACE STAR TECHNOLOGY (GROUP) Co. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140205 |
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| CX01 | Expiry of patent term |