CN114236237A - Single-end phase correction method for phase-matching cable assembly - Google Patents
Single-end phase correction method for phase-matching cable assembly Download PDFInfo
- Publication number
- CN114236237A CN114236237A CN202111550659.0A CN202111550659A CN114236237A CN 114236237 A CN114236237 A CN 114236237A CN 202111550659 A CN202111550659 A CN 202111550659A CN 114236237 A CN114236237 A CN 114236237A
- Authority
- CN
- China
- Prior art keywords
- phase
- cable
- ended
- assembly
- cable assembly
- Prior art date
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The invention relates to a single-ended phase correction method for a phase distribution cable, which comprises the following steps: calculating the length delta L of the core wire needing to be sheared according to the tested phase difference value; the open end of the cable assembly is repaired, so that the cable assembly is not detached to carry out real-time test and correction, and the phase value of the single-ended cable assembly in the vector network analyzer is observed until the phase value meets the requirement; if the tested cable exceeds the phase parameter value, calculating the length of the core wire needing to be compensated, and marking a compensation mark; peeling the other end of the cable assembly, adjusting the compensation parameters of peeling if the compensation identifier exists, and assembling a connector on the other end of the cable assembly; and performing double-end phase detection test on the same batch of cable assemblies one by one, and correcting few cables which exceed the phase parameter value requirement. The invention has the advantages that: the connector is prevented from being repeatedly assembled and disassembled, pins are inserted, core wires are cut, residual soldering tin in the connector is removed, assembly cost of the assembly is saved, and assembly welding quality is improved.
Description
Technical Field
The invention relates to the technical field of radio frequency cable assembly testing, in particular to a single-ended phase correction method for phase matching cable assembly.
Background
At present, in order to ensure the consistency of the electrical lengths of radio frequency cable components, a double-end phase matching method is generally adopted for cable assembly and test work, and the method mainly comprises the following steps: (1) connecting two end connectors of cables which need to be connected in the same batch; (2) a test determines a reference cable and normalizes the reference cable, and usually a cable with the shortest electrical length is used as the reference cable; (3) comparing the phases of the tested cable and the reference cable, and recording the phase difference value; (4) disassembling the first end connector, calculating the length of the core wire to be cut according to the phase difference value, processing, and assembling the connector after finishing; (5) and (4) repeating the steps (3) and (4) until the phase of the tested cable meets the phase parameter range of the established design requirement.
However, the prior art has the following problems: (1) the core wire processing link in the phase matching of the cable assembly cannot master the phase change condition of the assembly, and the work of core wire processing, connector assembling, phase testing and the like is difficult to avoid; (2) assembly personnel carry out a large amount of repetitive assembly and test work in the phase matching link, which brings about a large increase of time cost and personnel cost; (3) the connector ferrule and the bushing are difficult to avoid being welded for many times, so that the weldability of a welded part is poor, and the overall reliability of the cable assembly is influenced; (4) when the cable assembly works at a higher frequency, the difficulty of phase matching and assembling according to the existing method is multiplied, and the phenomena of scrapping of the cable assembly or incapability of completing the phase matching cable assembling and the like are easily caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a single-ended phase correction method for a phase distribution cable, which solves the problems in the prior art.
The purpose of the invention is realized by the following technical scheme: a single-ended phase correction method for a phase-matched cable, comprising:
step 1: and (5) peeling off the lower wire of the cable. Setting a cable inserting and peeling program according to the length requirement, and performing accurate inserting and peeling treatment on the cable by using a full-automatic cutting and peeling machine;
step 2: and assembling the terminal connector. After the single end of the cable assembly is dipped in tin, stripping the end by using a coaxial cable stripping machine, and assembling the single end connector; the other end is not stripped and is connected with a connector;
and step 3: and (4) vector network configuration. After the vector network analyzer is calibrated, configuring and setting two-channel Phase display interfaces S11 and S22, and simultaneously selecting an expanded Phase function of the vector network analyzer;
and 4, step 4: and determining a reference cable. Carrying out single-ended phase test on cables in the same batch one by one, carrying out normalization processing on the single-ended cable assembly with the maximum relative phase value until the test is complete, and determining the single-ended reference cable in the batch;
and 5: and determining the single-ended phase parameter of the cable assembly. Determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by phase correction of the single-ended cable assembly according to the requirement;
step 6: and (4) testing and analyzing the single-ended phase of the cable assembly. Carrying out single-ended phase test on the cable assemblies, connecting the tested single-ended cable assemblies to a vector network analyzer one by one, and calculating the length delta L of the core wires to be sheared according to the tested phase difference value;
and 7: and single-ended phase correction of the cable assembly. The tested cable assembly is not disassembled, a precise cable repairing tool is used for repairing the open end of the cable assembly, real-time phase detection, correction and control of the assembly are achieved, and the phase value of the single-ended cable assembly in the vector network analyzer is observed in real time until the phase value meets the requirement of the single-ended phase value;
and 8: single-ended phase compensation. According to the phase value of the tested cable, if the phase value exceeds the upper limit of the phase parameter requirement, calculating the length of the core wire to be compensated, and carrying out compensation marking;
and step 9: and assembling the other end of the cable assembly. Stripping the other end of the cable assembly by using a coaxial cable stripping machine, and adjusting stripping compensation parameters if compensation marks exist; meanwhile, a connector is arranged at the other end of the assembly cable;
step 10: and (3) detecting the parameters of the cable assemblies, namely performing phase detection on finished cable assemblies in the same batch one by one to ensure that the phase parameters of the cable assemblies meet the product requirements.
The invention has the following advantages:
1. by combining the vector network analyzer and the precise line repairing tool, the assembly is subjected to real-time phase detection, correction and control under the condition that the single-ended cable assembly is not detached, the controllability and accuracy of phase parameters are improved, and the phase of the single-ended cable assembly is corrected in place at one time;
2. the original double-channel test mode is changed into single-channel test, the single-end phase detection of the cable assembly can be carried out by fully utilizing two channels of the vector network analyzer without mutual influence, and meanwhile, the phase of the single-end cable can be controlled in real time in the phase correction process, so that the cable phase correction efficiency is greatly improved;
3. links such as taking and installing the connector and inserting pins, shearing core wires, clearing residual soldering tin in the connector and the like for multiple times are avoided, assembly cost of the assembly is saved, and assembly welding quality is improved;
4. the assembly efficiency of the cable assembly is obviously and effectively improved, the cable assembly is assembled according to the process flow, the one-time assembly qualification rate is extremely high, and the method can be popularized to the assembly of the radio frequency cable with higher frequency;
5. the method can effectively promote the assembly of the radio frequency phase distribution cable and the assembly line type operation mode, and provides a new idea for enlarging the production scale of the radio frequency phase distribution cable.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application provided below in connection with the appended drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the invention relates to a single-ended phase correction method for phase-matching cable assembly, which is realized by comprehensively using a full-automatic cutting and stripping machine, a vector network analyzer, coaxial cable stripping machine equipment and a precise wire repair tool, and fully researching a phase parameter theory;
the full-automatic cutting and stripping machine is mainly used for precise cable off-line operation and ensures consistency of physical lengths of off-lines of cables in the same batch; the vector network analyzer is mainly used for testing phase parameters of the cable assembly; the coaxial cable stripping machine is mainly used for stripping the cable end by adjusting parameters; the precise line repairing tool is mainly used for correcting the phase in real time in a phase correcting link under the condition of not dismounting a test cable.
For the single-channel and double-channel Phase tests of the component cable, the electrical length of the single-channel test of the cable component is approximately 2 times that of the double-channel test, so that the relation between single-end Phase correction and double-end Phase matching on the shearing length of a core wire is theoretically calculated and verified, and the calculation formula is formed as follows:
wherein. VpAnd (3) taking an effective numerical value before the percentage number for the transmission speed ratio of the cable, wherein f is frequency, the unit is GHz, and beta is the phase difference between the test cable and the reference cable.
And combining theoretical calculation and parameter verification of the single-ended phase correction phase requirement to form a phase requirement which can guide assembly operation and ensure the one-time qualified rate of the cable assembly: when the phase consistency requirement of single-ended phase correction is 1/2 of the phase consistency requirement of the cable assembly, the one-time qualification rate of the cable assembly test is high, and the requirements of design and process assembly can be met.
The process of the method comprises the following steps:
step 1: and (5) peeling off the lower wire of the cable. Setting a cable inserting and peeling program according to the length requirement, and performing accurate inserting and peeling treatment on the cable by using a full-automatic cutting and peeling machine;
step 2: and assembling the terminal connector. After the single end of the cable assembly is dipped in tin, stripping the end by using a coaxial cable stripping machine, and assembling the single end connector; the other end is not stripped and is connected with a connector;
and step 3: and (4) vector network configuration. After the vector network analyzer is calibrated, configuring and setting two-channel Phase display interfaces S11 and S22, and simultaneously selecting an expanded Phase function of the vector network analyzer;
and 4, step 4: and determining a reference cable. Carrying out single-ended phase test on cables in the same batch one by one, carrying out normalization processing on the single-ended cable assembly with the maximum relative phase value until the test is complete, and determining the single-ended reference cable in the batch;
and 5: and determining the single-ended phase parameter of the cable assembly. Determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by phase correction of the single-ended cable assembly according to the calculated requirement;
step 6: and (4) testing and analyzing the single-ended phase of the cable assembly. Carrying out single-ended phase test on the cable assemblies, connecting the tested single-ended cable assemblies to a vector network analyzer one by one, and calculating the length delta L of the core wire to be sheared according to a formula (1) according to the tested phase difference value;
for example: if the working frequency of a certain cable assembly is 10GHz, the transmission speed ratio is 83%, and the beta value is 5 degrees, the calculation can be carried out through the formula (1): in this cable assembly, the value of the cable core length Δ L to be cut by the single-ended phase correction is 0.1729mm in comparison with the reference cable in this frequency state.
And 7: and single-ended phase correction of the cable assembly. The tested cable assembly is not disassembled, a precise cable repairing tool is used for repairing the open end of the cable assembly, real-time phase detection, correction and control of the assembly are achieved, and the phase value of the single-ended cable assembly in the vector network analyzer is observed in real time until the phase value meets the single-ended phase value in the step (5);
and 8: single-ended phase compensation. According to the phase value of the tested cable, if the phase value exceeds the upper limit of the phase parameter requirement, calculating the length of the core wire to be compensated according to a formula (1), and carrying out compensation marking;
for example: the electrical length for a 1 ° cable assembly equation is 0.035mm, which is +10 ° relative to the reference cable. According to the formula (2), the delta L' L0.35mm can be calculated, namely the single-end phase compensation of the cable component is 0.35mm.
And step 9: and assembling the other end of the cable assembly. Stripping the other end of the cable assembly by using a coaxial cable stripping machine, and adjusting stripping compensation parameters if compensation marks exist; meanwhile, a connector is arranged at the other end of the assembly cable;
for example: setting a single-ended cable assembly, and setting the phase compensation of the single end in the step (8) to be 0.35 mm; the normal head stripping length of the inner conductor of the connector matching cable is 5mm. At the moment, the length of the stripping head of the inner conductor of the cable needs to be adjusted and set to be 5mm-0.35mmL4.65mm in the stripping head parameters of the coaxial wire stripper.
Step 10: and detecting parameters of the cable assembly. And carrying out phase detection on the finished cable assemblies in the same batch one by one, and ensuring that the phase parameters of the cable assemblies meet the product requirements.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A single-ended phase correction method for a phase-matched cable, characterized by: the single-ended phase correction method comprises a test correction step, wherein the test correction step comprises the following steps:
carrying out single-ended phase test on the single-ended cables in the same batch one by one, carrying out normalization processing on the single-ended cable assembly with the maximum relative phase value, determining a reference cable and marking the reference cable;
carrying out single-ended phase test on the cable assemblies, connecting the tested single-ended cable assemblies to a vector network analyzer one by one, and calculating the length delta L' of a core wire needing to be cut according to the tested phase difference;
the open end of the cable assembly is subjected to line repair processing, so that real-time phase detection, correction and control of the cable assembly are realized, and a phase value of the single-ended cable assembly in a vector network analyzer is observed in real time until the phase value meets the requirement of phase parameters;
judging whether the phase parameter value of the tested cable exceeds the phase parameter value, if so, calculating the length of the core wire needing to be compensated, and marking a compensation identifier;
peeling the other end of the cable assembly, adjusting the compensation parameters of peeling if the compensation identifier exists, and assembling a connector on the other end of the cable assembly;
and carrying out phase detection test on the cable assemblies in the same batch one by one, and correcting the cables exceeding the phase parameter value requirement.
2. A single-ended phase correction method for a phase-matched cable as defined in claim 1, wherein: the single-ended phase correction method further comprises a pre-processing step, wherein the pre-processing step is executed before the testing correction step, and the pre-processing step is not executed after the pre-processing of the same batch of cable components is completed.
3. A single-ended phase correction method for a phase-matched cable as defined in claim 2, wherein: the pre-processing step comprises:
setting a cable inserting and peeling program according to the length requirement, and performing advanced accurate inserting and peeling treatment on the cable;
tin dipping is carried out on a single end of the cable assembly, the coaxial cable is stripped and stripped, a single end connector is connected, and the other end is not stripped and a connector is connected;
calibrating the vector network analyzer, setting dual-channel phase display of S11 and S12, and expanding the phase function by selecting the vector network analyzer;
and determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by phase correction of the single-ended cable assembly according to the requirement.
4. A single-ended phase correction method for a phase-matched cable as defined in claim 2, wherein: the phase parameter determination requirements for single-ended phase correction are: and the phase consistency of the finished cable assembly is half of the requirement.
5. A single-ended phase correction method for a phase-matched cable as defined in claim 2, wherein: core wire shear length and phase compensation length for single-ended phase correction: namely, it is
Wherein VpThe cable transmission speed ratio is shown, f is the frequency, and beta is the phase difference between the test cable and the reference cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111550659.0A CN114236237B (en) | 2021-12-17 | 2021-12-17 | Single-ended phase correction method for phase matching cable assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111550659.0A CN114236237B (en) | 2021-12-17 | 2021-12-17 | Single-ended phase correction method for phase matching cable assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114236237A true CN114236237A (en) | 2022-03-25 |
| CN114236237B CN114236237B (en) | 2023-08-25 |
Family
ID=80757729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111550659.0A Active CN114236237B (en) | 2021-12-17 | 2021-12-17 | Single-ended phase correction method for phase matching cable assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114236237B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7417022A (en) * | 1974-01-30 | 1975-08-01 | Kabel Metallwerke Ghh | METHOD OF MEASURING PARTIAL RELIEF AND LOCATING INSULATION IN AN INSULATED GUIDE. |
| JPS55118203A (en) * | 1979-03-06 | 1980-09-11 | Dainichi Nippon Cables Ltd | Phase stabilizing method for cable |
| CN101332475A (en) * | 2008-07-23 | 2008-12-31 | 福建三钢闽光股份有限公司 | Automatic control method of head orientation of laying head |
| CN103616569A (en) * | 2013-11-20 | 2014-03-05 | 中国电子科技集团公司第四十一研究所 | Method for correcting near-field test phases of millimeter wave plane |
| CN104181392A (en) * | 2014-08-07 | 2014-12-03 | 电子科技大学 | Two-port network phase shift testing method based on vector network analyzer |
| CN106443198A (en) * | 2016-08-31 | 2017-02-22 | 东莞同济大学研究院 | Coaxial line testing method |
| CN106885970A (en) * | 2017-02-20 | 2017-06-23 | 大连理工大学 | Marine low-pressure power cable partial points fault detection method based on FDR methods |
| CN108151641A (en) * | 2017-12-14 | 2018-06-12 | 北京无线电计量测试研究所 | The length measurement method and equipment of a kind of radio-frequency transmission line |
| CN109596944A (en) * | 2019-01-11 | 2019-04-09 | 上海仁童电子科技有限公司 | Cable detection method, device and electronic equipment |
| CN111624519A (en) * | 2020-05-28 | 2020-09-04 | 江西博硕电子有限公司 | Cable detection system and cable detection method |
| CN111988063A (en) * | 2020-08-31 | 2020-11-24 | 中电科仪器仪表有限公司 | Cable loss compensation method and system for comprehensive tester |
| CN112630716A (en) * | 2020-12-11 | 2021-04-09 | 西安电子科技大学 | Two-port vector network analyzer calibration method based on weighting correction |
-
2021
- 2021-12-17 CN CN202111550659.0A patent/CN114236237B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7417022A (en) * | 1974-01-30 | 1975-08-01 | Kabel Metallwerke Ghh | METHOD OF MEASURING PARTIAL RELIEF AND LOCATING INSULATION IN AN INSULATED GUIDE. |
| JPS55118203A (en) * | 1979-03-06 | 1980-09-11 | Dainichi Nippon Cables Ltd | Phase stabilizing method for cable |
| CN101332475A (en) * | 2008-07-23 | 2008-12-31 | 福建三钢闽光股份有限公司 | Automatic control method of head orientation of laying head |
| CN103616569A (en) * | 2013-11-20 | 2014-03-05 | 中国电子科技集团公司第四十一研究所 | Method for correcting near-field test phases of millimeter wave plane |
| CN104181392A (en) * | 2014-08-07 | 2014-12-03 | 电子科技大学 | Two-port network phase shift testing method based on vector network analyzer |
| CN106443198A (en) * | 2016-08-31 | 2017-02-22 | 东莞同济大学研究院 | Coaxial line testing method |
| CN106885970A (en) * | 2017-02-20 | 2017-06-23 | 大连理工大学 | Marine low-pressure power cable partial points fault detection method based on FDR methods |
| CN108151641A (en) * | 2017-12-14 | 2018-06-12 | 北京无线电计量测试研究所 | The length measurement method and equipment of a kind of radio-frequency transmission line |
| CN109596944A (en) * | 2019-01-11 | 2019-04-09 | 上海仁童电子科技有限公司 | Cable detection method, device and electronic equipment |
| CN111624519A (en) * | 2020-05-28 | 2020-09-04 | 江西博硕电子有限公司 | Cable detection system and cable detection method |
| CN111988063A (en) * | 2020-08-31 | 2020-11-24 | 中电科仪器仪表有限公司 | Cable loss compensation method and system for comprehensive tester |
| CN112630716A (en) * | 2020-12-11 | 2021-04-09 | 西安电子科技大学 | Two-port vector network analyzer calibration method based on weighting correction |
Non-Patent Citations (2)
| Title |
|---|
| ALEX C. SILVA 等: "Lightning Wave Propagation Characteristics of an Overhead Line with Insulated Phase Conductors", 《2018 34TH INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION》, pages 1 - 6 * |
| 张培玲: "低压高速电力线通信关键技术研究", 《中国博士学位论文全文数据库信息科技辑》, no. 4, pages 136 - 29 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114236237B (en) | 2023-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5483132B2 (en) | Correction method for high frequency characteristics error of electronic parts | |
| KR20060051648A (en) | Process for rapid on-demand stator rewinds in electrical generators | |
| CN104459390A (en) | Method and system for calibrating voltage and current of battery management device | |
| EP3614154A1 (en) | Cable harness testing system and test method for testing cable harnesses | |
| CN114236237A (en) | Single-end phase correction method for phase-matching cable assembly | |
| CN109873286A (en) | A kind of radio-frequency cable component phase equalization assembly method | |
| DE102009027967A1 (en) | Method for stripping line for connecting e.g. sensor, in vehicle, involves recording current flow if stripping tool with electrical conductor forms electric circuit for line, when stripping line | |
| CN110045188B (en) | System and method for measuring insulation resistance of transformer without dismounting high-voltage side lead | |
| CA2702580C (en) | Wiring harness manufacturing method and system | |
| CN108153627B (en) | Airborne 1394b bus signal transmission integrity testing and evaluating method | |
| CN114113704B (en) | Device and method for measuring performance of finished aircraft harness part based on de-embedding technology | |
| CN110932046A (en) | Multi-head cable and assembling and processing method thereof | |
| CN104714122A (en) | Operation method of detection system | |
| CN211556213U (en) | Radio frequency adapter for coaxial cable electrical length test and test device | |
| CN109444712B (en) | Integrated circuit data screening method based on normalization method combined with Euclidean distance function | |
| WO2020216834A1 (en) | Method, device, and system for manufacturing an electric cable | |
| CN102176603A (en) | Method for manufacturing double-creel stand type signal transmission lines | |
| CN113740663B (en) | Airplane installed cable fault positioning method based on impedance characteristics | |
| Connectors | Performance Specification for Miniature Automotive Coaxial Connectors | |
| CN107544010B (en) | Test equipment and test method | |
| US20200395744A1 (en) | Quick Splice Tool | |
| JP6481885B2 (en) | Canon plug test stand | |
| CN113872097A (en) | Phase repairing method for step-type phase-stabilizing cable | |
| CN214866833U (en) | Cable bending device | |
| CN113904200A (en) | Coaxial cable inner conductor length trimming spacer and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |