A Method for Determining Coupling and Decoupling Characteristics of V-type Linear Impedance Stabilized Network

A technology for stabilizing network and linear impedance, which is applied in the direction of measuring resistance/reactance/impedance, instruments, measuring devices, etc. It can solve the problem of damage to test equipment and equipment under test, large variation of characteristic impedance with frequency, poor coupling and decoupling characteristics, etc. problems, to improve efficiency, simplify test steps, and improve accuracy

Active Publication Date: 2019-01-22
BEIHANG UNIV
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Problems solved by technology

Third-party measurement units generally do not perform measurement verification for the coupling and decoupling characteristics of LISN, but when the coupling and decoupling characteristics of LISN are used in the test, it may even damage the test equipment and the equipment under test in severe cases. Before using LISN, the coupling and decoupling characteristics of LISN should be analyzed and verified
[0006] When the LISN specified in the existing standard is working, the characteristic impedance changes greatly with the frequency, which affects the accuracy of the test results

Method used

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  • A Method for Determining Coupling and Decoupling Characteristics of V-type Linear Impedance Stabilized Network

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] According to the regulations of the International Radio Regulatory Committee on the LISN circuit (linear impedance stabilization network circuit) for electromagnetic compatibility test, the LISN circuit is divided into V-type and Δ-type structures. The present invention proposes a new coupling and decoupling characteristic calculation method for the V-type LISN circuit, to calculate the coupling and decoupling characteristics of the V-type LISN circuit, guide the design of the V-type LISN, and simplify the test steps of the LISN circuit , improve the test accuracy, and verify the correctness and reliability of the method through the actual measurement test. The present invention provides the coupling and decoupling characteristics of the V-type LISN through theoretical calculations, which has guiding significance for analyzing, designing and imp...

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Abstract

The invention discloses a coupling and decoupling characteristic determining method of a V-type line impedance stabilization network and belongs to the electromagnetic compatibility conducted emission testing technical field. According to the method, the coupling and decoupling characteristics of the V-type line impedance stabilization network can be calculated and analyzed; and as for a line impedance stabilization network (LISN) of which the component parameters are known, whether the coupling and decoupling characteristics of the LISN satisfy work requirements can be predicted in the aspect of trend. The method can predict and judge the coupling and decoupling characteristics of the LISN according to which a third party metering check unit does not carry out metering, and plays a role of guiding the design and development of novel LISN which can better satisfy requirements.

Description

technical field [0001] The invention relates to a method for determining the coupling and decoupling characteristics of a V-shaped linear impedance stabilization network, through which the coupling and decoupling characteristics of a V-type linear impedance stabilization network can be analyzed, and the correctness and reliability of the analysis method are verified by experiments , belongs to the technical field of electromagnetic compatibility conduction emission. Background technique [0002] In the electromagnetic compatibility conduction emission test, due to the different types of connections of the tested product, the power supply impedance at different positions varies greatly, resulting in drastic changes in the load terminal impedance of the tested product, which directly affects the test results of the tested product’s power line conducted emission . In order to make the conducted emission test results of power lines measured in different sites comparable, a line...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00G01R27/28
CPCG01R27/28G01R35/005
Inventor 苏东林吕冬翔戴飞刘焱
Owner BEIHANG UNIV
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