CN104393463A - Flexible microwave coaxial cable mechanical phase stability improving method and assembly - Google Patents
Flexible microwave coaxial cable mechanical phase stability improving method and assembly Download PDFInfo
- Publication number
- CN104393463A CN104393463A CN201410669290.9A CN201410669290A CN104393463A CN 104393463 A CN104393463 A CN 104393463A CN 201410669290 A CN201410669290 A CN 201410669290A CN 104393463 A CN104393463 A CN 104393463A
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- coaxial cable
- flexible microwave
- phase stability
- cable
- mechanical
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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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
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
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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
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
Abstract
The invention provides a flexible microwave coaxial cable mechanical phase stability improving method which applies pre-tensioning force at two ends of coaxial cables. The invention also discloses a flexible microwave coaxial cable assembly. The flexible microwave coaxial cable assembly comprises the coaxial cables and a protection sleeve which covers the coaxial cable outer layer, wherein pre-tensioning force adjusting mechanisms are arranged on welding structures at two ends of the coaxial cables. The flexible microwave coaxial cable mechanical phase stability improving method and assembly has the advantages of obviously reducing influences to transmission phase from testing cable assembly mechanical bending, enabling the pre-tensioning force of the coaxial cables to be consistent and accordingly eliminating mechanical phase stability difference caused by the material characteristic difference of the coaxial cables and the protection sleeve and the length machining difference; obviously improving the phase stability of the testing cable assembly mechanical bending; being applicable to microwave flexible cable assemblies having requirements for a mechanical stationary phase characteristic except for a testing cable assembly.
Description
Technical field
The present invention relates to a kind of method and the assembly that improve flexible microwave coaxial cable mechanical phase stability.
Background technology
In microwave communication and field tests, flexible microwave co-axial cable component is mainly used in the transmission of microwave signal between communication and test macro.One of its typical apply is the Measurement and analysis of microwave device power loss, gain and phase characteristic.This Measurement and analysis is generally by vector network analyzer (be called for short and vow net) and high-performance fixed ampllitude steady phase microwave coaxial test cable assembly (being called for short test cable assembly), has jointly come.Wherein test cable assembly is for connecting the input/output port of vowing net test port and measured device, is the flexible transfer passage (as Fig. 1) of microwave signal.In test process, for meeting the physical connection requirements between test cable assembly and each port of measured device, can there is mechanical deflection in various degree in test cable assembly usually.The stress that this mechanical deflection produces changes causing the microwave property of test cable length component and each composition material, thus has influence on transmission amplitude and the phase place of microwave signal.In addition, test cable assembly twisting, stretch and transverse shear stress time transmission characteristic all can there is in various degree change.This characteristic of test cable assembly is called as mechanical phase range stability.Because phase characteristic is more responsive to mechanical deformation, be therefore commonly referred to as mechanical phase stability.The mechanical phase stability of test cable assembly will generation impact in various degree on the measuring accuracy of detected element.Therefore, mechanical phase stability weighs the important indicator of the coaxial test cable assembly of flexible microwave.
For above-mentioned test cable assembly, the steady phase technical scheme of machinery of existing flexible microwave co-axial cable component is as Fig. 2.Test cable is made up of coaxial connector, sheath, coaxial cable three part.Its principle of stationary phase is: coaxial cable adopts special mechanical phase-compensated cable, can reduce to bend the phase place change brought; Extraneously to stretch in order to resist at outer one or more layers sheath of surface cover of coaxial cable, reverse and transverse direction pressure and control the maximum bending amplitude of coaxial cable, thus reduce coaxial cable axially, the stress of transverse direction and torsion, improve the mechanical stability of test cable assembly.
Although prior art have employed sheath to axial, the transverse direction reducing that coaxial cable is subject to and distorting stress, but still cannot overcome the STRESS VARIATION that cable assembly bends coaxial cable length and each composition material caused.As shown in Figure 3, in sheath during coaxial cable bending, the layers of material compression chord inside cable, cladding material tension stress; And during back-flexing, stress is completely contrary, therefore coaxial cable medium material stress amplitude of variation is larger; In addition coaxial cable itself has certain elasticity, and time bending, cable can be elongated.These all will cause the change of transmission characteristic.Therefore, in existing test cable module testing process, transmission phase place still has the change of certain amplitude with cable folding, mechanical phase stability still can not meet high precision measurement demand.In addition, due to the material behavior error of coaxial cable, sheath and the existence of length mismachining tolerance, cause the initial stress state of cable and sheath material after test cable assembling components different, therefore the mechanical phase stability difference of each test cable assembly is comparatively large, and qualification rate is lower.General employing screening mode is produced, and cost greater efficiency is low, even if the machinery of qualified products steady phase performance index discreteness is also larger.
Summary of the invention
The object of the invention is the deficiency existed for prior art, a kind of method that can significantly improve flexible microwave coaxial cable mechanical phase stability is provided.
For achieving the above object, the technical solution used in the present invention is a kind of method improving flexible microwave coaxial cable mechanical phase stability, and the method applies pre-tightening tension at the two ends of coaxial cable.This pre-tensioning makes coaxial cable be in tension, now coaxial cable elongation amplitude under equal bending radius diminishes, and pre-tensioning makes layers of material Tensile effect of stress simultaneously in both sides inside and outside bending radius, reduces the STRESS VARIATION amplitude of material during cyclic bending.This will significantly reduce the impact of test cable assembly mechanical deflection on transmission phase place.
Described pre-tightening tension is can the pre-tensioning of Continuous Adjustment, and the pre-tensioning of each coaxial cable is consistent, thus eliminates the mechanical phase stability difference that the material behavior error of coaxial cable and sheath and length mismachining tolerance bring.
The invention also discloses a kind of flexible microwave co-axial cable component, comprise coaxial cable and the sheath being wrapped in coaxial outer, the Welding Structure at coaxial cable two ends is provided with pre-tensioning adjusting mechanism.
For reaching better Adjustment effect, described pre-tensioning adjusting mechanism is the pre-tensioning adjusting mechanism that can regulate continuously.
Preferably, described pre-tensioning adjusting mechanism is threaded adjustment mechanisms, comprises screw thread and nut, adjusts tensile force size by adjusting nut moving left and right on screw thread.
Preferably, described pre-tensioning adjusting mechanism is many pads adjusting mechanism, by adjusting the quantity of pad, adjusts tensile force size.
The present invention is design modifying mechanism (as threaded adjustment mechanisms) on the welded unit at coaxial cable two ends, loads a pre-tensioning by the adjustment of adjusting mechanism to coaxial cable.This pre-tensioning makes coaxial cable be in tension, now coaxial cable elongation amplitude under equal bending radius diminishes, and pre-tensioning makes layers of material Tensile effect of stress simultaneously in both sides inside and outside bending radius, reduces the STRESS VARIATION amplitude of material during cyclic bending.This will significantly reduce the impact of test cable assembly mechanical deflection on transmission phase place.Adopt threaded adjustment mechanisms can also realize the Continuous Adjustment of pre-tensioning, the pre-tensioning of each coaxial cable is consistent, thus the mechanical phase stability difference that the material behavior error of elimination coaxial cable and sheath and length mismachining tolerance are brought.The rate of finished products that effective raising test cable component batch is produced and consistency, thus enhance productivity.
Beneficial effect: the present invention significantly reduces the impact of test cable assembly mechanical deflection on transmission phase place, the pre-tensioning of each coaxial cable is consistent, thus the mechanical phase stability difference that the material behavior error of elimination coaxial cable and sheath and length mismachining tolerance are brought; Obviously can improve the phase stability of test cable assembly mechanical deflection.Except test cable assembly, the present invention is applicable to all microwave flexible cable assemblies with the steady phasic property requirement of machinery.
Accompanying drawing explanation
Fig. 1 is microwave component electric performance test system;
Fig. 2 is the steady phase technical scheme of existing test cable assembly machinery;
Fig. 3 is the STRESS VARIATION schematic diagram of test cable assembly coaxial cable and sheath each composition material when bending;
Fig. 4 is structural representation of the present invention;
Fig. 5 is threaded adjustment mechanisms structural representation;
Fig. 6 is many pads adjusting mechanism structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, the present embodiment is implemented under premised on technical solution of the present invention, should understand these embodiments and only be not used in for illustration of the present invention and limit the scope of the invention.
Improve a method for flexible microwave coaxial cable mechanical phase stability, the method applies pre-tightening tension at the two ends of coaxial cable.This pre-tensioning makes coaxial cable be in tension, now coaxial cable elongation amplitude under equal bending radius diminishes, and pre-tensioning makes layers of material Tensile effect of stress simultaneously in both sides inside and outside bending radius, reduces the STRESS VARIATION amplitude of material during cyclic bending.This will significantly reduce the impact of test cable assembly mechanical deflection on transmission phase place.Wherein pre-tightening tension is can the pre-tensioning of Continuous Adjustment, and the pre-tensioning of each coaxial cable is consistent, thus eliminates the mechanical phase stability difference that the material behavior error of coaxial cable and sheath and length mismachining tolerance bring.
As shown in Figure 4, a kind of flexible microwave co-axial cable component, comprises coaxial cable 1 and is wrapped in the outer field sheath 2 of coaxial cable 1, the Welding Structure at coaxial cable two ends is provided with the pre-tensioning adjusting mechanism 3 that can regulate continuously.
After the two ends of coaxial cable are applied with pre-tensioning, coaxial cable is made to be in tension, now coaxial cable elongation amplitude under equal bending radius diminishes, and pre-tensioning makes layers of material Tensile effect of stress simultaneously in both sides inside and outside bending radius, reduce the STRESS VARIATION amplitude of material during cyclic bending, significantly reduce test cable assembly mechanical deflection to the impact of transmission phase place.
Fig. 5 is threaded adjustment mechanisms, comprise screw thread 4 and nut 5, on screw thread 4, the Continuous Adjustment that can also realize pre-tensioning is moved left and right by adjusting nut 5, the pre-tensioning of each coaxial cable is consistent, thus the mechanical phase stability difference that the material behavior error of elimination coaxial cable and sheath and length mismachining tolerance are brought.
Fig. 6 is many pads adjusting mechanism, it realizes the Continuous Adjustment of pre-tensioning by the quantity adding or reduce pad 6, the pre-tensioning of each coaxial cable is consistent, thus the mechanical phase stability difference that the material behavior error of elimination coaxial cable and sheath and length mismachining tolerance are brought.
Claims (6)
1. improve a method for flexible microwave coaxial cable mechanical phase stability, it is characterized in that: apply pre-tightening tension at the two ends of coaxial cable.
2. improve the method for flexible microwave coaxial cable mechanical phase stability according to claim 1, it is characterized in that: described pre-tightening tension is can the pre-tensioning of Continuous Adjustment.
3. a flexible microwave co-axial cable component, comprise coaxial cable (1) and be wrapped in coaxial cable (1) outer field sheath (2), it is characterized in that: in the Welding Structure at coaxial cable (1) two ends, being provided with pre-tensioning adjusting mechanism (3).
4. flexible microwave co-axial cable component according to claim 3, is characterized in that: described pre-tensioning adjusting mechanism (3) is the pre-tensioning adjusting mechanism that can regulate continuously.
5. flexible microwave co-axial cable component according to claim 3 or 4, it is characterized in that: described pre-tensioning adjusting mechanism (3) is threaded adjustment mechanisms, comprise screw thread (4) and nut (5), adjust tensile force size by adjusting nut (5) moving left and right on screw thread (4).
6. flexible microwave co-axial cable component according to claim 3 or 4, is characterized in that: described pre-tensioning adjusting mechanism (3) is many pads adjusting mechanism, by the quantity of adjustment pad (6), adjusts tensile force size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410669290.9A CN104393463B (en) | 2014-11-20 | 2014-11-20 | Improve the method and component of flexible microwave coaxial cable mechanical phase stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410669290.9A CN104393463B (en) | 2014-11-20 | 2014-11-20 | Improve the method and component of flexible microwave coaxial cable mechanical phase stability |
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| CN104393463A true CN104393463A (en) | 2015-03-04 |
| CN104393463B CN104393463B (en) | 2017-10-13 |
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| CN201410669290.9A Active CN104393463B (en) | 2014-11-20 | 2014-11-20 | Improve the method and component of flexible microwave coaxial cable mechanical phase stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098240A (en) * | 2016-07-27 | 2016-11-09 | 中国电子科技集团公司第四十研究所 | A kind of coaxial semi-rigid cable assembly meeting phase equalization requirement |
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| US2367944A (en) * | 1942-10-09 | 1945-01-23 | Titefiex Inc | Metal conduit |
| US2438146A (en) * | 1945-06-07 | 1948-03-23 | American Brass Co | Flexible metal hose |
| US4731502A (en) * | 1986-10-21 | 1988-03-15 | W. L. Gore & Associates, Inc. | Limited bend-radius transmission cable also having controlled twist movement |
| US5347244A (en) * | 1992-12-29 | 1994-09-13 | Canadian Marconi Company | Broadband directional coupler using cables |
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| CN201789085U (en) * | 2010-07-29 | 2011-04-06 | 江苏通鼎光电股份有限公司 | Adjustable radio-frequency coaxial cable testing connector |
| CN202471767U (en) * | 2012-02-23 | 2012-10-03 | 深圳市速联连接器有限公司 | Quick point test connector |
| CN103107465A (en) * | 2011-11-14 | 2013-05-15 | 西安艾力特电子实业有限公司 | Cable assembly |
| CN203445343U (en) * | 2013-07-03 | 2014-02-19 | 浩网科技股份有限公司 | Cable assembly and signal transmission system thereof |
-
2014
- 2014-11-20 CN CN201410669290.9A patent/CN104393463B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2367944A (en) * | 1942-10-09 | 1945-01-23 | Titefiex Inc | Metal conduit |
| US2438146A (en) * | 1945-06-07 | 1948-03-23 | American Brass Co | Flexible metal hose |
| US4731502A (en) * | 1986-10-21 | 1988-03-15 | W. L. Gore & Associates, Inc. | Limited bend-radius transmission cable also having controlled twist movement |
| US5347244A (en) * | 1992-12-29 | 1994-09-13 | Canadian Marconi Company | Broadband directional coupler using cables |
| CN201130702Y (en) * | 2007-12-15 | 2008-10-08 | 山西通用集团股份有限公司 | 7 millimeters plane joint microwave coaxial matched load |
| CN201577094U (en) * | 2009-12-15 | 2010-09-08 | 武汉安凯电缆有限公司 | Quick connection device in radio-frequency cable assembly passive intermodulation test |
| CN201789085U (en) * | 2010-07-29 | 2011-04-06 | 江苏通鼎光电股份有限公司 | Adjustable radio-frequency coaxial cable testing connector |
| CN103107465A (en) * | 2011-11-14 | 2013-05-15 | 西安艾力特电子实业有限公司 | Cable assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098240A (en) * | 2016-07-27 | 2016-11-09 | 中国电子科技集团公司第四十研究所 | A kind of coaxial semi-rigid cable assembly meeting phase equalization requirement |
| CN106098240B (en) * | 2016-07-27 | 2017-08-29 | 中国电子科技集团公司第四十一研究所 | A kind of coaxial semi-rigid cable component for meeting phase equalization requirement |
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| CN104393463B (en) | 2017-10-13 |
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