Abstract
The finite‐difference time‐domain (FDTD) method is successfully used to study electric field distributions on a printed circuit board (PCB) built in a wireless local area network (WLAN) communication unit. Simulation results of electric field distributions on the PCB are presented and compared with those obtained from measurement data for an opened metallic case of the WLAN communication unit. From measurement data and simulation results, it is found that simulation results have a good agreement with measurement data for an opened WLAN communication unit. From simulation results, it is also found that a resonant effect with a factor of 2 in the magnitude of electric fields on a test plane with a height of 1 cm over the PCB occurs for a closed WLAN communication unit.
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