We consider the boundary-value problem based on the Fourier transform and mode matching technique.
Radiation from two-dimensional groove-backed aperture antenna is ``presented. The line-current is assumed to represent the feeding part of the antenna. The boundary conditions are enforcement to obtain a set of simultaneous equations for discrete modal coefficients. The radiation characteristic is expressed in rapidly convergent series. The developed theory is expanded to a two-dimensional microstrip patch antenna. The radiation characteristics of the patch antenna are presented in terms of the position of line current source.
Radiation and scattering from cavity-backed planar aperture array antenna in a conducting plane with finite thickness is presented. The radiated fields are represented in terms of discrete and continuous modes based on Fourier transform, mode matching technique, and superposition principle. The point source is assumed to represent feeding system of antenna for an easy calculation with the radiation analysis based on the Fourier transform and mode matching technique. The boundary conditions are enforced to obtain a set of simultaneous equations for discrete modal coefficients. The radiation characteristic is expressed in rapidly convergent series. We obtain the rigorous and efficient solution of antenna radiation. The radiation behavior is investigated using the electromagnetic field in the aperture under stationary phase approximation. Based on the developed theory, numerical computation is performed to illustrate the radiation behavior in terms of aperture geometry and frequency. We optimize the design parameters and propose a novel planar aperture array antenna structure. Using optimized design parameters, we manufacture the planar aperture array antenna, measure its radiation behavior and compare with theoretical results. We consider the applicability of our theory to practical antenna structure.
Radiation, scattering and mutual coupling ...