Method-of-Moment Analysis of Slender Elliptic Slots

Abstract

Waveguide slot arrays are still one of the most popular solutions for microwave and radar antennas. In addition to standard rectangular shunt slots, there is an increasing interest in non-rectangular slots, which can perform better is some applications. We present here a complete approach to the computation of the self-admittance of a single elliptic slot, which has a better power handling than rectangular slots and, when the eccentricity is close to one, also a low cross-polarization. The analysis is done in the spectral domain using the Method-of-Moments, and a new approach to the computation of the Fourier transform of the slot (equivalent) magnetic current is presented.