Microstrip transmission line impedance parameter test method

A technology of microstrip transmission line and testing method, which is applied in the direction of measuring resistance/reactance/impedance, measuring device, measuring electrical variables, etc., which can solve the problems of unmeasured or inaccurate measurement, large parasitic inductance, small mutual inductance of coupled differential impedance lines, etc. problem, to achieve the effect of accurate test
CN101672874AActive Publication Date: 2010-03-17SHENZHEN BOMIN ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN BOMIN ELECTRONICS
Publication Date
2010-03-17

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Abstract

The invention discloses a microstrip transmission line impedance parameter test method; a low-inductance small-capacitance precise parameter tester with working frequency f which is more than (R / 2.81L) Hz and a test cable which is provided with a test probe and a grounded probe are adopted, and a sing-ended impedance test strip which is composed of two non-coupling microstrip transmission lines with a distance which is more than two times of line width, and a differential impedance test strip which is composed of two coupled microstrip transmission lines are used; by adopting the testing method, total distribution parameters of the microstrip transmission line can be measured accurately, so as to realize the purpose of accurately testing characteristic impedance of the microstrip transmission line with a distributed parameter method.
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Description

technical field

[0001] The invention relates to the technical field of electrical variable parameter testing, in particular to a method for testing impedance parameters of a microstrip transmission line. Background technique

[0002] Since the impedance line in the PCB circuit is usually very short, it is very difficult to directly test the impedance from the PCB circuit. Therefore, a certain length of impedance line is specially designed on the printed board for processing the PCB circuit. For testing, their physical The size is the same as the corresponding impedance line in the PCB circuit, and it is processed together with the PCB circuit under the same process conditions. This impedance line for testing is cut to form an impedance test strip. The test of the characteristics reflects the characteristics of the corresponding impedance lines in the PCB circuit. Impedance test strips are divided into single-ended impedance test strips and coupled differential impedance tes...

Claims

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