Analysis of finite-slot phased arrays fed by rectangular waveguides using method of moments

A rigorous integral equation formulation is made in this paper for the anal ysis of phased arrays of radiating slots fed by rectangular waveguides. The number of elements is assumed to be finite, and the integral equation used is that of the method of moments. According to the equivalence principle a nd magnetic field boundary conditions, an integral equation for obtaining s lot surface equivalence magnetic currents is formulated. Then, the integral equation is rewritten into a matrix equation after the implementation of t he method-of-moments procedure. The reflection coefficients as a function o f scan angle of; and the inductive magnetic currents over, the array elemen ts are analyzed and discussed in detail. (C) 2001 John Wiley & Sons, Inc.