带孔缝机箱的屏蔽效能仿真研究

利用Ansoft HFSS软件研究了电磁兼容设计中的孔缝耦合问题,介绍了有限元法的基本原理,对比仿真结果与对数周期天线的测量值,验证了此有限元法的可靠性.通过对带孔缝机箱建模,改变其孔缝的形状、面积等因素进行机箱的屏蔽效能仿真分析,获得了不同情况下的屏蔽效能仿真结果,并指导机箱内电路板的布置.

Study on Shielding Effectiveness Simulation of Enclosure with Apertures

This paper studies the problem of apertures coupling by using the Ansoft HFSS softw-are in EMC design,and described the basic principles of finite element method.Meanwhile,co-mparing simulation results with the measured value of log-periodic antenna,it verified the reliability of this finite element method.Through changing the factors of shape and size of apertures and other factors,the simulation results of shielding effectiveness would be come out in different circu-mstances,and direct the circuit board layout of the inside enclosure.