A Study of Small Aperture Diffraction

Abstract

Bethe's interpretation of a small metallic aperture as an electric dipole and a magnetic dipole provides a method which makes electromagnetic leakage through a small metallic aperture be easily understood and predicted. This paper reviewed Bethe's theory for small aperture leakage. Unreasonable assumptions in the theory derivation were pointed out. Limitations and recommendations on its application were listed and suggested.