CN102856717B - Radiofrequency coaxial connector with vacuum sealing function - Google Patents
Radiofrequency coaxial connector with vacuum sealing function Download PDFInfo
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- CN102856717B CN102856717B CN201210337228.0A CN201210337228A CN102856717B CN 102856717 B CN102856717 B CN 102856717B CN 201210337228 A CN201210337228 A CN 201210337228A CN 102856717 B CN102856717 B CN 102856717B
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- inner wire
- sealing ring
- coaxial connector
- outer conductor
- vacuum
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Abstract
The invention discloses a radiofrequency coaxial connector with a vacuum sealing function. The radiofrequency coaxial connector comprises an outer conductor and inner conductors in coaxial arrangement, each inner conductor is provided with a sealing ring in a sleeved manner, an annular sealing ring groove is arranged on an end face of the outer conductor, and sealing rings are arranged in the sealing ring groove. The radiofrequency coaxial connector is mounted on a system needing vacuum sealing and with radiofrequency input/output by adopting a threaded connection manner, pressure is generated on contact faces of polytetrafluoroethylene rings with the inner and outer conductors by the aid of threads to enable the inner conductors and the outer conductor to contact closely, and vacuum sealing of the system is realized between the outer conductor and a system cavity surface through a rubber sealing ring. The radiofrequency coaxial connector with the vacuum sealing function is simple in structure, convenient to mount, low in cost and reliable in connection. By testing, a related system applied with the connector can realize vacuum degree of 10-4Pa.
Description
Technical field
The present invention relates to radio frequency (RF) coaxial connector element, be specifically related to a kind of radio frequency (RF) coaxial connector with vacuum sealing function.
Background technology
Radio frequency (RF) coaxial connector refers to and is applied in radio-frequency region (3000Hz ~ 3000GHz), inner wire has dielectric support, structure can obtain minimum reflection coefficient within the scope of frequency of utilization in the measurements, usually be installed on cable or equipment, for the separable component (except adapter) of transmission line system electrical connection.
Radio frequency (RF) coaxial connector development history compared with other electronic components is shorter.Nineteen thirty has occurred that vehicle-mounted UHF connector is radio frequency connector the earliest in the world.World War II, due to the needs of war, along with the development of weapon, radar and microwave communication creates the middle-size and small-size series such as N, C, BNC, TNC type.Occur after 1958 that SMA, SMB, SMC, MCX, SSMA, SSMB etc. are small-sized, microminiaturized product successively.Within 1964, formulate MILSTD MIL-C-39012 " radio frequency (RF) coaxial connector generic specification ".The same year to nineteen sixty-five, China started radio frequency connector type selecting.1966 by designing, determining and selecting the product and standard that adapt to China's national situation in four machine portion set of organizations.From then on, radio frequency connector starts to standardization, generalization, seriation future development.
Through the joint efforts of various countries expert, radio frequency connector defines the professional system of independent completion, becomes the important component part in electric connector family, forms complete standards system, is the indispensable key element of coaxial transmission system.In recent years, the new product of radio frequency connector constantly occurs, as the products such as QMA, MMBX have declared patent, the operating frequency of product develops into 40GHz from 3GHz, and some product reaches 110GHz.
Radio frequency (RF) coaxial connector is divided into three major types by interface shape:
One is that screw-type connects: as 7/16 type, N-type, TNC type, SMA type etc.Be threaded owing to adopting, plug and socket is coordinated more stable, reliable, vibrationproof impact resistance is strong.
Two is bayonet couplings: as BNC type, C type, Q6 type etc.Owing to adopting bayonet socket to connect, easy to use, connect and not easily loosen, be separated again very rapid, a lot of Medical Devices, electronic instrument use.
Three is that plug-in type connects: as SMB, SMZ, MCX etc.Be characterized in that some have employed locking mechanism, major part is little, lightweight, the compact conformation of volume all, and the system that is applicable to has the instrument and equipment of requirement to volume, weight, particularly suitable drawer type, arranged type, cordwood system type are installed.
The technical characteristic of radio frequency (RF) coaxial connector is divided into two large classes: one is electrical parameter, and two is mechanical environment parameters.
Wherein electrical parameter mainly comprises characteristic impedance, frequency, voltage standing wave ratio, insertion loss, contact resistance, insulation resistance and withstand voltage and third order intermodulation etc.Mechanical environment parameter mainly comprises: mechanical test that the solderability of the environment for use temperature of product, the interchangeability of product, product, the sealing of product, engaging force, insertion force, confining force, the intensity of bindiny mechanism, vibration, impact, collision, salt mist test, mechanical endurance, cable tighten up etc.
In the market annual all sexual can better radio frequency connector listing, various types of radio frequency connector has corresponding manufacturing specification, physical dimension, making material, can be used in general occasion.But for the occasion that some are special, as system requirements have a higher vacuum leakproofness time, this kind of pervasive radio frequency connector can not meet vacuum-packed requirement.In this case, need to adopt the special-purpose radio-frequency connector construction with good vacuum seal performance.
Summary of the invention
Problem to be solved by this invention is: how to design a kind of radio frequency (RF) coaxial connector with vacuum sealing function, to meet the radiofrequency signal I/O needs of vacuum sealing system.This connector also should have structure simple, easy for installation, with low cost, connect the features such as reliable.
Technical scheme of the present invention is: a kind of radio frequency (RF) coaxial connector with vacuum sealing function, comprise outer conductor and the inner wire of coaxial setting, described inner wire is arranged with sealing ring, and outer conductor end face has the seal groove of annular, is provided with sealing ring in seal groove.
Further, the first inner wire that described inner wire is connected by threaded coaxial and the second inner wire are formed, described first inner wire and the second inner wire entirety are all in one-level stepped cylindrical shape, the diameter of first larger one end of inner wire and the equal diameters of the less one end of the second inner wire, first less one end of inner wire is provided with external screw thread, and be connected with second larger one end of conductor by external screw thread, the larger end of the first inner wire and the second inner wire comparatively small end are provided with pin holes.
Further, described sealing ring has three, be polytetrafluoroethylene ring, be respectively the second sealing ring on the first sealing ring being set in first larger one end of inner wire, the middle part being set in second less one end of inner wire and end and the 3rd sealing ring, the external diameter of described sealing ring is 3.3 with the ratio of internal diameter, and the external diameter of described sealing ring is 2.3 with the ratio of the external diameter of the larger end of the second inner wire.
Further, described sealing ring is rubber seal.
Further, periphery, described outer conductor two ends has external screw thread.
Feature of the present invention is: when connector is connected on vacuum sealing system by external screw thread, because outer conductor end face is provided with sealing ring, thus realizes sealing with system vacuum.Sealing ring on inner wire also can form multi-sealed effect between inner wire and outer conductor, and sealing ring can also play the effect of fixing inner wire and isolation outer conductor and inner wire, does not arrange insulating barrier separately, thus simplify the structure at needs.
The present invention compared with prior art tool has the following advantages:
Radio frequency (RF) coaxial connector of the present invention can meet the radiofrequency signal I/O needs of vacuum sealing system.And have structure simple, easy for installation, with low cost, connect the features such as reliable.
Accompanying drawing explanation
Fig. 1 is cutaway view of the present invention;
Fig. 2 is the structural representation of the second inner wire in the present invention;
Fig. 3 is the structural representation of the first inner wire in the present invention;
Fig. 4 is the structural representation of the outer conductor in the present invention;
Fig. 5 is the structural representation of the sealing ring in the present invention;
Wherein, 1 outer conductor, 2 second inner wires, 3 first inner wires, 4 first sealing rings, 5 second sealing rings, 6 the 3rd sealing rings, 7 sealing rings, 8,9 external screw threads, 10 seal grooves.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Embodiment 1
As shown in Figures 1 to 5, a kind of radio frequency (RF) coaxial connector with vacuum sealing function, comprise outer conductor 1 and the inner wire of coaxial setting, described inner wire is arranged with sealing ring, outer conductor 1 end face has the seal groove 10 of annular, be provided with the sealing ring 7 of quality of rubber materials in seal groove 10, its processing request is the size that its size will be a bit larger tham seal groove 10.
The first inner wire 3 that described inner wire is connected by threaded coaxial and the second inner wire 2 are formed, described first inner wire 3 and the second inner wire 2 entirety are all in one-level stepped cylindrical shape, the diameter of first larger one end of inner wire 3 and the equal diameters of second less one end of inner wire 2, first less one end of inner wire 3 is provided with external screw thread, and be connected by larger 2 one end of external screw thread and the second conductor, the larger end of the first inner wire 3 and the second inner wire 2 comparatively small end are provided with pin holes.
Described sealing ring has three, be polytetrafluoroethylene ring, be respectively be set in first larger one end of inner wire 3 the first sealing ring 4, be set in the second inner wire compared with the second sealing ring 5 on the middle part of 2 little one end and end and the 3rd sealing ring 6, the external diameter of described sealing ring is 3.3 with the ratio of internal diameter, and the external diameter of described sealing ring is 2.3 with the ratio of the external diameter of the larger end of the second inner wire 2.
For the ease of connecting, periphery, outer conductor two ends has external screw thread 8,9.
Its characteristic impedance of radio frequency (RF) coaxial connector General Requirements is 50 ohm, and in order to meet this requirement, the diameter of the inner and outer conductor of coaxial connector has certain proportionate relationship.
Characteristic impedance computing formula:
In formula, Z
0for the characteristic impedance of desirable coaxial line,
for medium relative dielectric constant, D is the internal diameter of connector outer conductor, and d is the external diameter of connector inner wire.
The dielectric constant of medium that wherein the present invention will use has: air
, polytetrafluoroethylene
, generally get 2.2.
According to characteristic impedance computing formula, draw 50 ohm coaxial line D/d ≈ 2.3 of air dielectric, PTFE medium 50 ohm coaxial line D/d ≈ 3.3.So in order to the characteristic impedance meeting connector be the requirement of 50 ohm, in Fig. 5, the ratio of the internal-and external diameter ratio D11/D10=3.3 of sealing ring, the D0 in D8 and the Fig. 2 namely in Fig. 4 is 3.3.And in order to the characteristic impedance meeting air dielectric coaxial line be 50 ohm, the ratio of the D1 in D8 and the Fig. 2 in Fig. 4 is 2.3.
Fig. 2 is the second inner wire 2 of the present invention, and it is connected with the first inner wire 3 by screw thread.Second sealing ring 5 and the 3rd sealing ring 6 are enclosed within above it, and its processing request is that diameter D0 and D1 meets the attach ratios of 50 ohm coaxial lines with the ratio of the internal diameter of outer conductor.
Fig. 3 is the first inner wire 3 of the present invention, and its Main Function is connected with the I/O joint of vacuum system, even can do integral by the signal output coaxial cable inner wire in itself and vacuum system, same second inner wire 2 of its processing request.
Fig. 5 is sealing ring, and its Main Function fixes the first inner wire 3 and the second inner wire 2 and plays vacuum-packed function.Its making requires it is the plus tolerance that its height will have 0.2.The object of such work is that sealing surface is fully contacted.
Claims (1)
1. one kind has the radio frequency (RF) coaxial connector of vacuum sealing function, comprise outer conductor and the inner wire of coaxial setting, it is characterized in that: described inner wire is arranged with sealing ring, outer conductor end face has the seal groove of annular, sealing ring is provided with in seal groove, the first inner wire that described inner wire is connected by threaded coaxial and the second inner wire are formed, described first inner wire and the second inner wire entirety are all in one-level stepped cylindrical shape, the diameter of first larger one end of inner wire and the equal diameters of the less one end of the second inner wire, first less one end of inner wire is provided with external screw thread, and be connected with second larger one end of inner wire by external screw thread, the larger end of first inner wire and the second inner wire comparatively small end are provided with pin holes, described sealing ring has three, be polytetrafluoroethylene ring, be respectively the first sealing ring being set in first larger one end of inner wire, be set in the second sealing ring on the middle part of second less one end of inner wire and end and the 3rd sealing ring, the external diameter of described sealing ring is 3.3 with the ratio of internal diameter, the external diameter of described sealing ring is 2.3 with the ratio of the external diameter of the larger end of the second inner wire.
2. a kind of radio frequency (RF) coaxial connector with vacuum sealing function according to claim 1, is characterized in that: described sealing ring is rubber seal.
3. a kind of radio frequency (RF) coaxial connector with vacuum sealing function according to claim 1, is characterized in that: periphery has external screw thread at described outer conductor two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210337228.0A CN102856717B (en) | 2012-09-13 | 2012-09-13 | Radiofrequency coaxial connector with vacuum sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210337228.0A CN102856717B (en) | 2012-09-13 | 2012-09-13 | Radiofrequency coaxial connector with vacuum sealing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102856717A CN102856717A (en) | 2013-01-02 |
| CN102856717B true CN102856717B (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210337228.0A Expired - Fee Related CN102856717B (en) | 2012-09-13 | 2012-09-13 | Radiofrequency coaxial connector with vacuum sealing function |
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| CN (1) | CN102856717B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457066B (en) * | 2013-08-22 | 2015-09-09 | 合肥市半山阁电子科技有限公司 | Split type RF coaxial adapters |
| CN105514555A (en) * | 2016-01-14 | 2016-04-20 | 西安金波科技有限责任公司 | High-temperature-resistant millimeter wave connector |
| CN107240843B (en) * | 2017-06-02 | 2019-03-08 | 西北核技术研究所 | Survey the high s/n ratio coaxial cable connector of electric current |
| CN108718012A (en) * | 2018-05-29 | 2018-10-30 | 中国科学院上海光学精密机械研究所 | Non-magnetic ultrahigh vacuum microwave connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200144U (en) * | 1985-04-01 | 1985-10-10 | 南京工学院 | Sealed socket with drier |
| CN201113063Y (en) * | 2007-10-27 | 2008-09-10 | 贵州航天电器股份有限公司 | High-low temperature resistant and low-permeability sealed radio frequency coaxial electric connector |
| CN201303170Y (en) * | 2008-11-06 | 2009-09-02 | 镇江天安电信电器有限公司(中外合资） | Coaxial connector |
| CN201797099U (en) * | 2010-07-30 | 2011-04-13 | 合肥佰特微波技术有限公司 | Radio frequency coaxial connector with air-tight structure |
-
2012
- 2012-09-13 CN CN201210337228.0A patent/CN102856717B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200144U (en) * | 1985-04-01 | 1985-10-10 | 南京工学院 | Sealed socket with drier |
| CN201113063Y (en) * | 2007-10-27 | 2008-09-10 | 贵州航天电器股份有限公司 | High-low temperature resistant and low-permeability sealed radio frequency coaxial electric connector |
| CN201303170Y (en) * | 2008-11-06 | 2009-09-02 | 镇江天安电信电器有限公司(中外合资） | Coaxial connector |
| CN201797099U (en) * | 2010-07-30 | 2011-04-13 | 合肥佰特微波技术有限公司 | Radio frequency coaxial connector with air-tight structure |
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|---|---|
| CN102856717A (en) | 2013-01-02 |
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