Dynamic Test Method Based on Strong Electromagnetic Pulse for Electromagnetic Shielding Materials with Field-Induced Insulator-Conductor Phase Transition

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Wang, Yun^1 ; Zhao, Min^1 ; Wang, Qingguo^1

Electrostatic and Electromagnetic Protection Institute, Army Engineering University, Shijiazhuang

050003, China^1

关键词: Dynamic test methods;    Experiment system;    Field induced;    Insulating performance;    S11 parameters;    Shielding performance;    Square pulse;    Working frequency;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012041/pdf
DOI  :  10.1088/1757-899X/301/1/012041

来源: IOP

【 摘 要 】

In order to measure the pulse shielding performance of materials with the characteristic of field-induced insulator-conductor phase transition when materials are used for electromagnetic shielding, a dynamic test method was proposed based on a coaxial fixture. Experiment system was built by square pulse source, coaxial cable, coaxial fixture, attenuator, and oscilloscope and insulating components. S11 parameter of the test system was obtained, which suggested that the working frequency ranges from 300 KHz to 7.36 GHz. Insulating performance is good enough to avoid discharge between conductors when material samples is exposed in the strong electromagnetic pulse field up to 831 kV/m. This method is suitable for materials with annular shape, certain thickness and the characteristic of field-induced insulator-conductor phase transition to get their shielding performances of strong electromagnetic pulse.