Analysis of electromagnetic pulse penetration into a rectangular cavity with an aperture

Abstract

We consider the boundary-value problem of penetrating pulse through a cavity-backed rectangular aperture in terms of discrete and continuous modes based on Fourier transform and mode-matching technique. An exact and rapidly convergent series in frequency domain based on modal analysis is derived. Utilizing this solution set, the inverse Fast Fourier Transform (IFFT) is applied to obtain the time-domain solution set for penetrating pulse. Based on the developed theory, numerical computation is performed to illustrate the field behavior in terms of many kinds of parameters. This result gives the applicability of our theory in many fields of study including electromagnetic interference and compatibility.