Transmission through slits formed by inclined planes

The phase and the amplitude of electromagnetic fields transmitted through two-dimensional slits are investigated both theoretically and experimentally. The slits are formed by two inclined perfectly conducting planes. The approximate theory employed is based on the modification of the high frequency diffraction by a half-plane (modified geometrical theory of diffraction (GTD)). The experimental measurements were performed using a parallel-plate range. Results indicate that the effect of the relative inclinations of the planes tends to be of importance only for the cases of narrow slits, i.e., a third of a wavelength or less.