CAJ | 학술논문

提出一种在屏蔽箱体孔缝结构的外部增加截止波导管结构的方法，利用截止波导管对高频电磁波的衰减作用来提高屏蔽箱体屏蔽效能。基于有限元法分别对截止波导管的长度、厚度及其形状进行仿真，仿真结果表明：在0.1 GHz~1 GHz频率范围内，随着截止波导管长度及厚度的增加屏蔽箱体屏蔽效能提高15dB以上，圆形和矩形截止波导管对屏蔽效能影响不大。根据实际情况合理选择截止波导管的长度及厚度可以提高微弱信号处理电路的电磁抗干扰能力。
제출일충재병폐상체공봉결구적외부증가절지파도관결구적방법，이용절지파도관대고빈전자파적쇠감작용래제고병폐상체병폐효능。기우유한원법분별대절지파도관적장도、후도급기형상진행방진，방진결과표명：재0.1 GHz~1 GHz빈솔범위내，수착절지파도관장도급후도적증가병폐상체병폐효능제고15dB이상，원형화구형절지파도관대병폐효능영향불대。근거실제정황합리선택절지파도관적장도급후도가이제고미약신호처리전로적전자항간우능력。
A method joining waveguide out of the shield structure is presented,by using the effect of the attenuation of high-frequency electromagnetic waves in waveguide to improve shielding effectiveness. Finite element method is used to modeling and simulation of the waveguide length,thickness and the shape. The simulation results show that:in the range of the 0.1 GHz~1 GHz frequency,the shielding enclosure shielding effectiveness with the increase of length and thickness of the waveguide has improved 15 dB and also improved a little on the rectangular and circular waveguide. According to the actual situation to choice a reasonable length and the thickness of the waveguide,the electromagnetic immunity of the weak signal processing circuit can be improved.