CN111900564A - Switching device of coaxial transmission line and microstrip transmission line - Google Patents
Switching device of coaxial transmission line and microstrip transmission line Download PDFInfo
- Publication number
- CN111900564A CN111900564A CN202010687597.7A CN202010687597A CN111900564A CN 111900564 A CN111900564 A CN 111900564A CN 202010687597 A CN202010687597 A CN 202010687597A CN 111900564 A CN111900564 A CN 111900564A
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- China
- Prior art keywords
- blind hole
- diameter
- contact
- inner conductor
- step portion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
- H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The invention discloses a switching device of a coaxial transmission line and a microstrip transmission line, which comprises an inner conductor, a spring and a contact element, wherein one end of the inner conductor is provided with a blind hole, the part of the inner conductor, which is positioned at the periphery of the blind hole, is provided with a structure which is concave towards the blind hole, and the aperture of the concave structure of the inner conductor is smaller than that of the blind hole of the inner conductor; the contact is including the middle part, connect in the interior step portion and the outer step portion at middle part both ends, and in the blind hole of inner conductor was arranged in to the spring, the both ends of spring contacted the mortgage with the hole bottom of blind hole and the terminal surface of the interior step portion of contact respectively, and the interior step portion of contact is located the blind hole and spacing in the hole bottom of blind hole and the region between the blind hole indent structure. The invention solves the switching problem of the coaxial transmission line and the microstrip transmission line, has simple assembly and can realize the low standing wave and low insertion loss transmission of microwave signals within the temperature range of-55 ℃ to +125 ℃.
Description
Technical Field
The invention relates to the technical field of microwave devices, in particular to a switching device of a coaxial transmission line and a microstrip transmission line.
Background
The coaxial transmission line is a coaxial transmission line consisting of a coaxial inner conductor, a coaxial outer conductor and a coaxial intermediate medium; microstrip transmission lines are transmission lines consisting of a single conductor strip on a dielectric substrate. Microwave passive devices such as radio frequency coaxial fixed attenuators and loads generally use microstrip circuits on microstrip pieces to realize functions such as attenuation and impedance matching, and connector parts of the coaxial fixed attenuators and the coaxial loads are coaxial structures, so that coaxial transmission lines and microstrip transmission lines need to be switched. The coaxial microstrip switching device needs to connect the inner conductor of the coaxial transmission line with the microstrip piece, and the performance of the coaxial microstrip switching device directly influences the return loss indexes of microwave devices such as a radio frequency coaxial fixed attenuator and a coaxial load.
The prior coaxial fixed attenuator and load product usually use a corrugated pipe with elasticity in the axial direction to realize the elastic contact between an inner conductor and a microstrip sheet; however, the corrugated pipe cannot adopt common processing modes such as turning, boring and the like, and can only be processed by corrosion after electroforming on a core mould, so that the processing difficulty is high, the yield is low and the cost is high; the bellows has small allowable axial elastic deformation, is easy to damage and has high requirement on assembly proficiency; the bellows can provide small elastic contact force and poor reliability; during assembly, the corrugated pipe can be only placed into the hole of the inner conductor along the axial direction, cannot be fixed and is easy to fall off; the working temperature range of the corrugated pipe structural scheme is 0-40 ℃, the environmental adaptability is poor, and the microwave signal transmission in the temperature range of-55 ℃ to +125 ℃ cannot be realized.
Disclosure of Invention
The invention provides a switching device of a coaxial transmission line and a microstrip transmission line, which solves the switching problem of the coaxial transmission line and the microstrip transmission line, has simple assembly and can realize low standing wave and low insertion loss transmission of microwave signals within the temperature range of-55 ℃ to +125 ℃.
The technical scheme of the invention is as follows:
a switching device of a coaxial transmission line and a microstrip transmission line comprises an inner conductor, a spring and a contact element, wherein the inner conductor, the spring and the contact element are all processed by gold plating of metal materials; a blind hole is formed in one end of the inner conductor, a structure which is concave towards the blind hole is arranged on the part, located on the periphery of the blind hole, of the inner conductor, and the aperture of the concave structure is smaller than that of the blind hole of the inner conductor; the contact including the middle part, connect in the interior step portion and the outer step portion at middle part both ends, the diameter of interior step portion and outer step portion all is greater than the diameter at middle part, the diameter of step portion and outer step portion in the contact all is less than the aperture of blind hole, the aperture of inner conductor indent structure department is greater than the diameter at contact middle part and is less than the diameter of step portion and outer step portion in the contact, the spring arrange the blind hole of inner conductor in, the both ends of spring press with the hole bottom of blind hole and the terminal surface contact of step portion in the contact respectively, the interior step portion of contact is located the blind hole and spacing in the hole bottom of blind hole and the region between the blind hole indent structure.
The contact piece also comprises a guide part connected with the end of the inner step part, and the guide part of the contact piece is sleeved in the spring.
The structure of the inner conductor inwards concaved towards the blind hole is two concave points punched towards the blind hole direction from the outer wall of the inner conductor, or is an annular groove structure extruded towards the blind hole direction from the outer wall of the inner conductor, wherein the two concave points are radially symmetrical along the blind hole, and the distance between the two concave points is greater than the diameter of the middle part of the contact element and is smaller than the diameter of the inner step part and the outer step part of the contact element.
The inner step portion and the outer step portion of the contact piece respectively comprise a conical surface transition portion and an equal-diameter portion, the maximum diameter of the conical surface transition portion is equal to the diameter of the equal-diameter portion, the large-diameter end of the conical surface transition portion is fixedly connected with the equal-diameter portion, the minimum diameter of the conical surface transition portion is equal to the diameter of the middle portion of the contact piece, and the small-diameter end of the conical surface transition portion is fixedly connected with the middle portion of the contact piece.
The outer step portion of the contact element is connected with a limiting connecting piece, and the outer diameter of the limiting connecting piece is larger than the aperture of the blind hole.
The invention has the advantages that:
(1) the spring and the inner step part of the contact element are arranged in the blind hole of the inner conductor, the contact element provides elastic force by the compressed spring, the switching between the coaxial transmission line and the microstrip transmission line is realized, and the microwave signal transmission with low standing wave and low insertion loss can be realized within the temperature range of-55 ℃ to +125 ℃.
(2) The blind hole of the inner conductor is provided with the concave structure, so that the inner steps of the spring and the contact element are limited in the blind hole of the inner conductor, the contact element can move along the axial direction and cannot fall out, and the assembly is easier.
(3) The contact member of the present invention is provided with a guide portion, and the spring can be prevented from being displaced when the contact member moves in the axial direction.
(4) After the microstrip piece and the contact piece are assembled, the contact piece is extruded to the spring end in the inner conductor blind hole, and the contact piece is contacted with the microstrip piece and is not separated by the elastic force generated after the spring is compressed, so that the contact reliability is improved.
Drawings
FIG. 1 is a schematic view of the structure of the invention after being mated with a micro-strip.
Fig. 2 is a schematic structural diagram of the present invention.
FIG. 3 is a schematic view of the structure of the contact of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the adapter for a coaxial transmission line and a microstrip transmission line comprises an inner conductor 1, a spring 2 and a contact element 3, wherein the inner conductor 1, the spring 2 and the contact element 3 are all processed by gold plating of a metal material; a blind hole 11 is formed in one end of the inner conductor 1, a structure 12 which is concave towards the blind hole is arranged on the part, located on the periphery of the blind hole 11, of the inner conductor 1, and the aperture of the concave structure 12 is smaller than that of the blind hole 11 of the inner conductor; the contact element 3 comprises a middle part 31, an inner step part 32 and an outer step part 33 which are connected with two ends of the middle part 31, and a guide part 34 which is connected with the end of the inner step part 32, the diameters of the inner step part 32 and the outer step part 33 are both larger than the diameter of the middle part 31, the diameters of the inner step part 11 and the outer step part 33 of the contact element are both smaller than the aperture of the blind hole 11, the inner diameter of the concave structure 12 of the inner conductor 1 is larger than the diameter of the middle part 31 of the contact element and smaller than the diameters of the inner step part 32 and the outer step part 33 of the contact element, the spring 2 is arranged in the blind hole 11 of the inner conductor, the guide part 34 of the contact element is sleeved in the spring 2, two ends of the spring 2 are respectively contacted and pressed with the hole bottom of the blind hole 11 and the end surface of the inner step part 32 of the contact element, the inner step part 32 of the contact element is arranged in the blind hole 11 and limited in the area between the hole bottom of the blind, the outer diameter of the limit connecting piece 4 is larger than the aperture of the blind hole 11.
The structure 12, which is recessed towards the blind hole, on the inner conductor is two concave points punched from the outer wall of the inner conductor 1 towards the blind hole 11, or is an annular groove structure extruded from the outer wall of the inner conductor 1 towards the blind hole 11, wherein the two concave points are symmetrical along the radial direction of the blind hole, and the distance between the two concave points is greater than the diameter of the middle part 31 of the contact and smaller than the diameters of the inner step part 32 and the outer step part 33 of the contact; the concave structure 12 is small, impedance discontinuity is avoided, and radio frequency signals can be transmitted in a low standing wave state.
The inner step portion 32 and the outer step portion 33 of the contact piece respectively comprise a conical surface transition portion and an equal diameter portion, the maximum diameter of the conical surface transition portion is equal to the diameter of the equal diameter portion, the large diameter end of the conical surface transition portion is fixedly connected with the equal diameter portion, the minimum diameter of the conical surface transition portion is equal to the diameter of the middle portion of the contact piece, and the small diameter end of the conical surface transition portion is fixedly connected with the middle portion of the contact piece.
After the microstrip piece 5 is assembled, the contact piece 3 is extruded towards the end of the spring 2 in the inner conductor blind hole 11, the outer end face of the contact piece 3 is contacted with the microstrip piece 5 and is not separated by the elastic force generated after the spring 2 is compressed, the contact reliability is improved, the gap between the contact piece 3 and the inner conductor blind hole 11 is small, and radio frequency signal transmission is basically not influenced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a coaxial transmission line and microstrip transmission line's switching device which characterized in that: the spring comprises an inner conductor, a spring and a contact element, wherein the inner conductor, the spring and the contact element are all processed by gold plating of metal materials; a blind hole is formed in one end of the inner conductor, a structure which is concave towards the blind hole is arranged on the part, located on the periphery of the blind hole, of the inner conductor, and the aperture of the concave structure is smaller than that of the blind hole of the inner conductor; the contact including the middle part, connect in the interior step portion and the outer step portion at middle part both ends, the diameter of interior step portion and outer step portion all is greater than the diameter at middle part, the diameter of step portion and outer step portion in the contact all is less than the aperture of blind hole, the aperture of inner conductor indent structure department is greater than the diameter at contact middle part and is less than the diameter of step portion and outer step portion in the contact, the spring arrange the blind hole of inner conductor in, the both ends of spring press with the hole bottom of blind hole and the terminal surface contact of step portion in the contact respectively, the interior step portion of contact is located the blind hole and spacing in the hole bottom of blind hole and the region between the blind hole indent structure.
2. The transition device of claim 1, wherein: the contact piece also comprises a guide part connected with the end of the inner step part, and the guide part of the contact piece is sleeved in the spring.
3. The transition device of claim 1, wherein: the structure of the inner conductor inwards concaved towards the blind hole is two concave points punched towards the blind hole direction from the outer wall of the inner conductor, or is an annular groove structure extruded towards the blind hole direction from the outer wall of the inner conductor, wherein the two concave points are radially symmetrical along the blind hole, and the distance between the two concave points is greater than the diameter of the middle part of the contact element and is smaller than the diameter of the inner step part and the outer step part of the contact element.
4. The transition device of claim 1, wherein: the inner step portion and the outer step portion of the contact piece respectively comprise a conical surface transition portion and an equal-diameter portion, the maximum diameter of the conical surface transition portion is equal to the diameter of the equal-diameter portion, the large-diameter end of the conical surface transition portion is fixedly connected with the equal-diameter portion, the minimum diameter of the conical surface transition portion is equal to the diameter of the middle portion of the contact piece, and the small-diameter end of the conical surface transition portion is fixedly connected with the middle portion of the contact piece.
5. The transition device of claim 1, wherein: the outer step portion of the contact element is connected with a limiting connecting piece, and the outer diameter of the limiting connecting piece is larger than the aperture of the blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010687597.7A CN111900564A (en) | 2020-07-16 | 2020-07-16 | Switching device of coaxial transmission line and microstrip transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010687597.7A CN111900564A (en) | 2020-07-16 | 2020-07-16 | Switching device of coaxial transmission line and microstrip transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111900564A true CN111900564A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010687597.7A Pending CN111900564A (en) | 2020-07-16 | 2020-07-16 | Switching device of coaxial transmission line and microstrip transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111900564A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078430A (en) * | 2021-03-30 | 2021-07-06 | 青岛兴仪电子设备有限责任公司 | Transmission line for improving voltage standing wave ratio and program-controlled step attenuator |
| CN114156677A (en) * | 2021-12-18 | 2022-03-08 | 深圳特思嘉工业电子有限公司 | Crown spring terminal and assembly process thereof |
| CN114583477A (en) * | 2022-05-05 | 2022-06-03 | 中国电子科技集团公司第二十九研究所 | Pressing strip structure for center contact of crimping connector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208062291U (en) * | 2018-05-14 | 2018-11-06 | 杜克莱科技（深圳）有限公司 | A kind of New connector |
| CN110350277A (en) * | 2019-07-18 | 2019-10-18 | 中电科仪器仪表有限公司 | A kind of microminiature SMP radio frequency coaxial matching load |
-
2020
- 2020-07-16 CN CN202010687597.7A patent/CN111900564A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208062291U (en) * | 2018-05-14 | 2018-11-06 | 杜克莱科技（深圳）有限公司 | A kind of New connector |
| CN110350277A (en) * | 2019-07-18 | 2019-10-18 | 中电科仪器仪表有限公司 | A kind of microminiature SMP radio frequency coaxial matching load |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078430A (en) * | 2021-03-30 | 2021-07-06 | 青岛兴仪电子设备有限责任公司 | Transmission line for improving voltage standing wave ratio and program-controlled step attenuator |
| CN114156677A (en) * | 2021-12-18 | 2022-03-08 | 深圳特思嘉工业电子有限公司 | Crown spring terminal and assembly process thereof |
| CN114583477A (en) * | 2022-05-05 | 2022-06-03 | 中国电子科技集团公司第二十九研究所 | Pressing strip structure for center contact of crimping connector |
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| PB01 | Publication | ||
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Application publication date: 20201106 |