The EMC Analyzing And Optimizing Based On The PCB Design

Electromagnetic Compatibility (EMC) is a kind of comprehensive science. A lot ofdomains are involved in, such as the theory of electromagnetism, measurement ofelectromagnetism, electrotechnics, electronics, signal analysis, cybernation, mechanics,biomedicine, materials & techniques etc. The problem on the study of EMC is very complextoo. The research on electromagnetic compatibility shows the great significance in enhancingthe electromagnetic compatibility of the electronic production and improving the people'sliving electromagnetic environment.With the development of science and technology, the high-frequency electromagneticinterference of electron devices brings more problems of EMC. The interference influencesnot only PCB's EMC, but also product's cost. Before lots of boards produce, we find out theillogical place on the design of PCB through the computer simulation, and solve the EMCproblems before the product being made. It will save plenty of time and money.Electromagnetic Interference in the PCB will great influence PCB's work performance. In thisarticle, Field method is used to analyze the PCB's EMC with high-frequency interference. It isrealized by using some commercial software.First of all, the EMC problems of PCB are discussed theoretically. The essence andqualification of EMI are discussed. Two main radiation interferences and the measures ofreducing the interference are analyzed.Secondly, the EMC analyzing with high-frequency interference in PCB is discussed. Thesoftware Protel 99SE and Ansoft Designer2.2 are adopted to execute the task, and the currentplots and EM near field plots of the PCB can be get. According to the plots, the circuit designcan be improved.Finally, the summary is made and main results are given.