Research on Electromagnetic Protection of Laser Fuze Receiving System

Guixiong Dong,Xiangjin Zhang

OPTOELECTRONIC MATERIALS AND DEVICES (ICOMD 2020)(2021)

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摘要
When the pulsed laser proximity fuze works in a strong electromagnetic environment, strong electromagnetic pulses will be coupled from the optical window of the receiving system into the cavity and cause serious interference to the circuit system, resulting in inaccurate detection range, misfires and even early explosions. By studying the relationship between light transmittance and shielding efficiency of metal grating films with different periods and line widths, a metal grating film with appropriate periods and line widths is selected to shield the optical window. The CST software was used to establish an integrated shielding model loaded with metal grid light windows. The simulation results showed that the electromagnetic shielding performance reached 40dB in the 0-8GHz frequency band, while meeting the shielding performance requirements of the detection target.
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关键词
Laser fuze, Metal grid, Electromagnetic shielding, CST
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