CN106129541A - A kind of U-shaped broadband coaxial rotary joint - Google Patents
A kind of U-shaped broadband coaxial rotary joint Download PDFInfo
- Publication number
- CN106129541A CN106129541A CN201610570863.1A CN201610570863A CN106129541A CN 106129541 A CN106129541 A CN 106129541A CN 201610570863 A CN201610570863 A CN 201610570863A CN 106129541 A CN106129541 A CN 106129541A
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- China
- Prior art keywords
- outer conductor
- inner wire
- rotary joint
- coaxial rotary
- section
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/06—Movable joints, e.g. rotating joints
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- Waveguide Connection Structure (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The present invention relates to microwave component technical field, be specifically related to a kind of U-shaped broadband coaxial rotary joint, including the inner wire being coaxially disposed and outer conductor, described outer conductor is tubular structure, and outer conductor is enclosed within outside inner wire, and and inner wire between be provided with radial clearance；The both ends of described inner wire and outer conductor, by short circuit face short circuit, make inner and outer conductor mutual conduction；The middle part of described inner wire and outer conductor disconnects and forms choke groove, and makes inner and outer conductor be divided into two-section respectively, can relatively rotate between two-section inner and outer conductor；An adapter it is respectively provided with on every section of inner wire.This broadening having taken into account bandwidth of operation and the lifting of power capacity, the most also have simple in construction, be prone to processing, the high advantage with life-span length of reliability.
Description
Technical field
The present invention relates to microwave component technical field, be specifically related to a kind of U-shaped broadband coaxial rotary joint.
Background technology
Rotary joint (Rotary Joint) refers to be connected between the structure of relative rotary motion, be used for transmitting energy or
The attachment means of signal.In mechanical scanning radar, rotary joint is generally seated in antenna pedestal, and its effect is when radar antenna exists
Continuously in rotary course, it is ensured that the electromagnetic energy in feeding transmission line and signal normal transmission, be in radar feeding transmission line
One of key components.Rotary joint divides according to relatively rotating part-structure, mainly has coaxial line style and circular waveguide type two
Kind.Wherein the TEM mould of coaxial line style transmission electromagnetic wave, realizes rotation by designing choke groove on the internal and external conductor of coaxial line
Turn；And circular waveguide type prevailing transmission TM01 mould, realize rotating by designing choke groove on circular waveguide wall.The two is main special
Levy if comparing, coaxial line style rotary joint relatively round waveguide type rotary joint, superiority bandwidth is obvious, but the rotation of circular waveguide type
Turn joint and bear more powerful；Circular waveguide type rotary joint is single channel, and on basis, coaxial line style U-shaped Single-channel Rolling joint
On, coaxial nested structure form can be used to constitute Two channels rotating joint, the coaxial line of the i.e. second road rotary joint is nested in the
Inside one road rotary joint coaxial line, volume is less, and weight is lighter.Selection for rotary joint form needs according to being actually subjected to
Asking, the factor compromise of comprehensive each side considers.
Owing to U-shaped rotary joint is the basis constituting Two channels rotating joint, and orientation is to pitching to rotary joint also
This input/output port is needed to become the version of U-shaped distribution with rotating main body, to U-shaped rotary joint bandwidth, power and reliable
The requirement of the indexs such as property is more and more higher.
Summary of the invention
It is an object of the invention to as solving the limitation that above-mentioned U-shaped Coaxial rotary joint exists, it is provided that a kind of structure letter
Single U-shaped Coaxial rotary joint, bandwidth of operation can bear higher power more than three octaves simultaneously.
For achieving the above object, the invention provides techniques below scheme: a kind of U-shaped broadband coaxial rotary joint, including
The inner wire being coaxially disposed and outer conductor, described outer conductor is tubular structure, and outer conductor is enclosed within outside inner wire, and and inner wire
Between be provided with radial clearance；The both ends of described inner wire and outer conductor, by short circuit face short circuit, make inner and outer conductor phase mutual conductance
Logical；The middle part of described inner wire and outer conductor disconnects and forms choke groove, and makes inner and outer conductor be divided into two-section, two-section respectively
Can relatively rotate between inner and outer conductor；An adapter it is respectively provided with on every section of inner wire.
The two ends of described outer conductor are additionally provided with outer conductor transition matching section, and described outer conductor transition coupling is ladder shaft-like,
And multidiameter reduces stepwise from outer end inboard end diameter, described outer conductor transition matching section comprises one-level or at least two-stage step.
Be provided with adapter transition matching section between described adapter and inner wire, described adapter transition matching section be connected
Ladder shaft-like structure is formed between device.
The low frequency of signal of this rotary joint transmission, free space wavelength that high frequency is corresponding with mid frequency use λ respectivelyl、λh
And λ0Represent；The radius a of inner wire represents, the radius b of outer conductor represents, the size of described a, b should meet formula: λh≥π
And b/a=1.649 (a+b).
Described adapter is about λ to the distance between the short-circuit face of homonymy0/4。
The length of every grade of step of outer conductor transition matching section is equal.
Distance between two adapters is about λ0/2。
In inner and outer conductor, the length of choke groove is about λ0/4。
On inner wire, choke groove width is 0.4mm, and on outer conductor, choke groove width is 0.5mm.
Described inner wire radius is 13.6mm, and outer conductor radius is 23.2mm；Adapter between homonymy short circuit face away from
From slightly 90mm；Outer conductor transition matching section has two-stage step, every grade of length of bench to be 30mm, and two-stage step radius is respectively
44mm and 32mm；Distance between two adapters is 170mm；The a length of 80mm of choke groove on inner wire, choke groove on outer conductor
A length of 90mm.
The method have technical effect that: the present invention uses outer conductor transition matching section to carry out impedance matching, by adjusting
Changeover portion size produces multiple resonant frequencies, the bandwidth of rotary joint can be carried out effective broadening, and bandwidth of operation can be more than three
Octave.Coaxial connector uses one section of adapter transition matching section to carry out impedance matching with the main coaxial line of rotary joint, can
Bear bigger power.Take into account the broadening of bandwidth of operation and the lifting of power capacity, the most also there is simple in construction, be prone to add
The high advantage with life-span length of work, reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is that the rotary joint of the present invention is by emulating the curve that gained voltage standing wave ratio parameter changes with frequency.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As it is shown in figure 1, a kind of U-shaped broadband coaxial rotary joint, including the inner wire 1 being coaxially disposed and outer conductor 2, described
Outer conductor 2 is tubular structure, and it is outside that outer conductor 2 is enclosed within inner wire 1, and and inner wire 1 between be provided with radial clearance；Lead in described
The both ends of body 1 and outer conductor 2, by short circuit face 8 short circuit, make inner and outer conductor 1,2 mutual conduction；Described inner wire 1 and leading outward
The middle part of body 2 disconnects and forms choke groove 4, and makes inner and outer conductor 1,2 be divided into two-section respectively, two-section inner and outer conductor 1,2 it
Between can relatively rotate；An adapter 3 it is respectively provided with on every section of inner wire 1.Time specifically used, wherein one section of inner wire 1 is with outer
Conductor 2 is connected with fixed component, and another section of inner wire 1 is connected with rotary part with outer conductor 2, it is achieved mutually between rotatable parts
Normal feed.
Further, the two ends of described outer conductor 2 are additionally provided with outer conductor transition matching section 6, and described outer conductor transition is mated
Section 6 is ladder shaft-like structure, and multidiameter reduces stepwise from outer end inboard end diameter, and described outer conductor transition matching section 6 comprises
One-level or at least two-stage step.The present invention uses outer conductor transition matching section 6 to carry out impedance matching, by adjusting outer conductor transition
Matching section 6 size produces multiple resonant frequencies, the bandwidth of rotary joint can be carried out effective broadening, and bandwidth of operation can be more than three
Octave.
Further, adapter transition matching section 5, described adapter transition it are provided with between described adapter 3 and inner wire 1
Ladder shaft-like structure is formed between matching section 5 and adapter 3.Adapter 3 uses one section with the main coaxial line of rotary joint and is connected
Device transition matching section 5 carries out impedance matching, can bear bigger power.
Preferably, the low frequency of signal of this rotary joint transmission, free space wavelength that high frequency is corresponding with mid frequency are divided
Do not use λl、λhAnd λ0Represent；The radius a of inner wire 1 represents, the radius b of outer conductor 2 represents, the size of described a, b should expire
Foot formula: λh>=π (a+b) and b/a=1.649.Described adapter 3 is about λ to the distance between the short-circuit face 8 of homonymy0/4.Outward
The length of every grade of step of conductor transition matching section 6 is equal.Distance between two adapters 3 is about λ0/2.Inner and outer conductor 2
The length of upper choke groove 4 is about λ0/4。
As the preferred embodiments of the present invention, on inner wire 1, choke groove 4 width is 0.4mm, and on outer conductor 2, choke groove 4 is wide
Degree is 0.5mm.Described inner wire 1 radius is 13.6mm, and outer conductor 2 radius is 23.2mm；Adapter 3 to homonymy short circuit face 8 it
Between distance slightly 90mm；Outer conductor transition matching section 6 has two-stage step, every grade of length of bench to be 30mm, two-stage step half
Footpath is respectively 44mm and 32mm；Distance between two adapters 3 is 170mm；On inner wire 1, a length of 80mm of choke groove 4, leads outward
The a length of 90mm of choke groove 4 on body 2.
By increasing by two sections of isometric outer conductor transition matching sections 6, impedance monotone decreasing, add resonant frequency point, from
And make the frequency band of rotary joint obtain broadening.Matching section impedance, by adjusting cylindrical radius and length, is adjusted the most accordingly
Whole coaxial connector, to the distance in short circuit face 8, realizes impedance matching, it is thus achieved that band spread.
Fig. 2 is the curve changed with frequency by ansoft HFSS15.0 emulation gained voltage standing wave ratio parameter.VSWR≤
Under conditions of 1.3, carrying a width of 0.38 to 1.46GHz, relative bandwidth is 117%, and bandwidth of operation is more than three octaves.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. a U-shaped broadband coaxial rotary joint, it is characterised in that: include inner wire and the outer conductor being coaxially disposed, described outside
Conductor is tubular structure, and outer conductor is enclosed within outside inner wire, and and inner wire between be provided with radial clearance；Described inner wire is with outer
The both ends of conductor, by short circuit face short circuit, make inner and outer conductor mutual conduction；The middle part of described inner wire and outer conductor disconnects shape
Become choke groove, and make inner and outer conductor be divided into two-section respectively, can relatively rotate between two-section inner and outer conductor；Lead in every section
An adapter it is respectively provided with on body.
U-shaped broadband coaxial rotary joint the most according to claim 1, it is characterised in that: the two ends of described outer conductor also set
Having outer conductor transition matching section, described outer conductor transition coupling is ladder shaft-like, and multidiameter is from outer end inboard end diameter stepwise
Reducing, described outer conductor transition matching section comprises one-level or at least two-stage step.
U-shaped broadband coaxial rotary joint the most according to claim 2, it is characterised in that: described adapter and inner wire it
Between be provided with adapter transition matching section, between described adapter transition matching section and adapter formed ladder shaft-like structure.
U-shaped broadband coaxial rotary joint the most according to claim 3, it is characterised in that: the signal of this rotary joint transmission
Low frequency, free space wavelength that high frequency is corresponding with mid frequency use λ respectivelyl、λhAnd λ0Represent；The radius of inner wire a table
Showing, the radius b of outer conductor represents, the size of described a, b should meet formula: λh>=π (a+b) and b/a=1.649.
U-shaped broadband coaxial rotary joint the most according to claim 4, it is characterised in that: short to homonymy of described adapter
Distance between road surface is about λ0/4。
U-shaped broadband coaxial rotary joint the most according to claim 5, it is characterised in that: outer conductor transition matching section every
The length of level step is equal.
U-shaped broadband coaxial rotary joint the most according to claim 6, it is characterised in that: the distance between two adapters
It is about λ0/2。
U-shaped broadband coaxial rotary joint the most according to claim 7, it is characterised in that: the length of choke groove in inner and outer conductor
Degree is about λ0/4。
U-shaped broadband coaxial rotary joint the most according to claim 8, it is characterised in that: on inner wire, choke groove width is
0.4mm, on outer conductor, choke groove width is 0.5mm.
U-shaped broadband coaxial rotary joint the most according to claim 3, it is characterised in that: described inner wire radius is
13.6mm, outer conductor radius is 23.2mm；Adapter is to the distance slightly 90mm between homonymy short circuit face；Outer conductor transition is mated
Section has two-stage step, every grade of length of bench to be 30mm, and two-stage step radius is respectively 44mm and 32mm；Between two adapters
Distance is 170mm；The a length of 80mm of choke groove on inner wire, a length of 90mm of choke groove on outer conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610570863.1A CN106129541B (en) | 2016-07-19 | 2016-07-19 | A kind of U-shaped broadband coaxial rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610570863.1A CN106129541B (en) | 2016-07-19 | 2016-07-19 | A kind of U-shaped broadband coaxial rotary joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106129541A true CN106129541A (en) | 2016-11-16 |
| CN106129541B CN106129541B (en) | 2019-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610570863.1A Active CN106129541B (en) | 2016-07-19 | 2016-07-19 | A kind of U-shaped broadband coaxial rotary joint |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039714A (en) * | 2017-05-07 | 2017-08-11 | 合肥开泰机电科技有限公司 | A kind of inclined-plane coupling broadband rotary joint |
| CN110661063A (en) * | 2019-09-23 | 2020-01-07 | 嘉兴恩碧技电气有限公司 | Substrate integrated waveguide feed broadband coaxial rotary joint |
| CN115084804A (en) * | 2022-06-28 | 2022-09-20 | 电子科技大学 | GW level circle TM 01 Mould vacuum rotary joint |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57168502A (en) * | 1981-04-08 | 1982-10-16 | Mitsubishi Electric Corp | Multichannel rotary joint |
| CN103117441A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Waveguide ring coupler |
-
2016
- 2016-07-19 CN CN201610570863.1A patent/CN106129541B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57168502A (en) * | 1981-04-08 | 1982-10-16 | Mitsubishi Electric Corp | Multichannel rotary joint |
| CN103117441A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Waveguide ring coupler |
Non-Patent Citations (1)
| Title |
|---|
| 程海荣 等: ""一种宽带非接触式同轴旋转关节的设计与仿真"", 《雷达与对抗》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039714A (en) * | 2017-05-07 | 2017-08-11 | 合肥开泰机电科技有限公司 | A kind of inclined-plane coupling broadband rotary joint |
| CN107039714B (en) * | 2017-05-07 | 2020-09-18 | 合肥开泰机电科技有限公司 | Inclined plane coupling broadband rotary joint |
| CN110661063A (en) * | 2019-09-23 | 2020-01-07 | 嘉兴恩碧技电气有限公司 | Substrate integrated waveguide feed broadband coaxial rotary joint |
| CN110661063B (en) * | 2019-09-23 | 2021-10-01 | 嘉兴恩碧技电气有限公司 | Substrate integrated waveguide feed broadband coaxial rotary joint |
| CN115084804A (en) * | 2022-06-28 | 2022-09-20 | 电子科技大学 | GW level circle TM 01 Mould vacuum rotary joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106129541B (en) | 2019-03-12 |
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