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A contact impedance measurement system and method for radio frequency band electrical contact elements

An electrical contact element, contact impedance technology, applied in the direction of measuring resistance/reactance/impedance, measuring device, measuring electrical variables, etc., can solve problems such as electrical connection quality detection, reduce output noise, improve low-impedance test sensitivity, and measure Sensitive effect

Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a contact impedance measurement system and method for electric contact elements in the radio frequency band, aiming to solve the problem of electrical connection quality detection of contact elements such as shrapnel, foam and connectors in radio frequency communication systems

Method used

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  • A contact impedance measurement system and method for radio frequency band electrical contact elements
  • A contact impedance measurement system and method for radio frequency band electrical contact elements
  • A contact impedance measurement system and method for radio frequency band electrical contact elements

Examples

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Embodiment

[0041] In this embodiment, the signal source in the system adopts the N9310A signal of Agilent Company, the output signal power in the test is set to 20dBm, the frequency is set to 728MHz, the signal power at the input end of the coupler b is 17dBm, and the contact element to be tested is a DIN type female The connection structure composed of the head and the DIN type male head, as shown in the diagram figure 1 (b) shown.

[0042] Through the above system and test method, record the multimeter readings of the connection structure under different torques, and calculate the output signal amplitude of the combiner as follows: image 3 As shown in (a), the calculated contact resistance of the contact element is as follows image 3 (b) shown. According to the test results, it is shown that the radio frequency impedance test sensitivity of the measurement system and test method disclosed in the present invention can reach 10mΩ.

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PUM

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Abstract

The invention discloses a contact impedance measurement system and method for an electrical contact element of a radio frequency band. A single-frequency signal is adopted to excite a contact elementto be measured; a zero-setting unit is adopted to deduct the response generated by other structures in a reflected signal to improve the measurement sensitivity; and the contact impedance of the contact element to be measured is calculated by measuring the amplitude and phase of the output signal of the zero-setting unit. The extracted contact impedance of the electrical contact element can be used for simulation design of problems such as radio frequency system impedance mismatch, passive inter-modulation radiation stray interference and the like, and evaluation of the electrical connection quality of different contact elements, so that the radio frequency system design is guided.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a contact impedance measuring system and method for radio frequency band electric contact elements. Background technique [0002] Electrical contact refers to the electrical connection between conductors and conductors produced by contact for the purpose of ensuring the transfer of current from one conductor to another. In the field of radio frequency technology, the contact impedance and nonlinear effect generated by electrical contact are one of the important factors that affect the quality and reliability of radio frequency system signal transmission. [0003] In the radio frequency system, due to the need for electrical connection, a variety of contact elements are used, including shrapnel, foam, conductive glue and connectors. Such as figure 1 As shown in , two contact situations of the shrapnel and the coaxial connector are given, and the labels ①, ② and ③ ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02G01R23/16G01R27/28
CPCG01R23/16G01R27/02G01R27/28
Inventor 赵小龙贺永宁胡扬波叶鸣曹智
Owner XI AN JIAOTONG UNIV
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