A Method of Analyzing the Impact of the Wiring Parameters on the Electromagnetic Coupling to PCB Inside Electronic Equipment

This paper proposes a method of field-TL-circuit joint simulation method to analyze the impact of wiring parameters on the electromagnetic coupling to PCB inside electronic equipment. The coupling mechanism of PCB is established on the basis of the multiconductor transmission theory and field-TL coupling theory. Then, the field-TL-circuit joint simulation technique is applied to analyze electromagnetic coupling model of PCB. Finally, a model of electronic equipment with a piece of PCB under three different wiring paths is constructed to discuss the EM interference issue of PCB. The calculated results indicate that the sensitive circuit should be kept away from strongly interfering wiring area and reasonable wiring can reduce the radiated electromagnetic interference.