脉冲激光引信发射接收模块的电磁干扰

 针对脉冲激光引信应用于中小口径常规弹药过程，由于体积严格受限而造成引信内部电磁干扰严重的问题，结合发射、接收模块工作原理，说明在其内部采取电磁干扰抑制措施的必要性。通过分析发射、接收模块电磁干扰产生机理，提出采用双重屏蔽方法抑制辐射干扰，采用线性阻抗稳定网络、缓冲网络和共差模合成扼流圈结合的多重滤波技术抑制传导干扰。对各措施作用效果进行仿真与实验，结果表明：厚度为1.55 mm钢材料对辐射干扰具有良好屏蔽效果；接收模块输出干扰信号峰峰值减小至70 mV,约为原干扰信号的1/40。这些方法大幅度降低了脉冲激光引信内部的电磁干扰，且工作稳定可靠。

Electromagnetic interference technique of transmitter and receiver modules for pulsed laser fuze

For the serious electromagnetic interference (EMI) problem in fuze arisen from volume constraints in the application of pulsed laser fuze to medium/small caliber conventional ammunition, the paper analyzes the necessity of adopting anti-interference measures internally with the principle of transmitter and receiver modules. Dual shielding which inhibits radiated interference (RI) and multi-filtering technique composed of linear impedance stabilization circuit, buffer network, CM-DM integrated choke, which inhibits conducted interference are proposed by analyzing EMI mechanism of transmitter module and receiver module. Simulations show that steel shield with the thickness of 1.55×10-3 m has good shielding effect on RI. Experiments prove that the peak value of receiver module interference s