Coupling effects of incident electromagnetic waves to multilayered PCBs in metallic enclosures

When a multilayered PCB is located in a metallic enclosure, resonant modes of the enclosure and the PCB can affect coupling phenomena. In this paper, coupling effects of incident electromagnetic waves to a multilayered PCB in a metallic enclosure is measured and analyzed. Several peaks are observed at the measured results in the frequency domain, and it is found that the peaks are generated at the enclosure resonant frequencies, as well as the PCB resonant frequency.