ANALYSIS OF A STRIP IN A WAVE-GUIDE

An analysis and an experimental study of a strip in a transverse plane of a rectangular waveguide below cutoff are presented in this paper, This work is a preliminary step in analyzing a stripline-fed slot ante nna array in which each stripline feed is enclosed in a rectangular wa veguide below cutoff, A numerical method is developed to solve a ''pse udo'' mixed-potential integral equation for the current on the strip e xcited by a delta-gap source at some point along the strip, The Green' s function for dipole sources in the rectangular waveguide is used in the spectral and spatial representations and Shanks' transform is empl oyed to speed up the convergence of the doubly infinite series, Numeri cal and experimental results are presented for a monopole fed at one w all of a rectangular waveguide and for a bottom-fed and bottom-loaded strip in a rectangular waveguide.