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在军用电子设备的应用中,在同一种装备中会出现多种功能不同的电子分单元机箱,所以在抗住其它分设备的电磁干扰的同时,也要使本身的设备不能干扰其他设备,所以必须在印制电路板设计中,考虑电磁兼容和电磁干扰问题。本文以电磁兼容为题,展开了在印制电路板设计上的接地和去耦的作用,阻抗匹配的重要性和如何控制信号传输线的阻抗,以及印制电路板的地线结构作了分析,从避免印制电路板形成辐射和提高其抗干扰能力的角度阐述了在印制电路板上如何合理布置地线及地线网格、地线面的应用方法,最后分析了印制电路板的布线原则。
In the application of military electronic equipment, in the same equipment will appear a variety of functions of different electronic sub-unit chassis, so anti-other sub-equipment in the electromagnetic interference, but also to make their own equipment can not interfere with other devices, so Must be in the printed circuit board design, consider the issue of electromagnetic compatibility and electromagnetic interference. In this paper, the topic of electromagnetic compatibility, launched in the printed circuit board design grounding and decoupling role, the importance of impedance matching and how to control the impedance of signal transmission lines, as well as the printed circuit board ground structure was analyzed, From the perspective of avoiding the formation of radiation and improving its anti-jamming ability of printed circuit board, this paper expounds how to reasonably arrange the ground and ground grid and ground plane on printed circuit board. Finally, Cabling principles.