Abstract
An improved design procedure using a full-wave analysis technique is presented for planar slot array antennas. The method is illustrated for a planar array designed for a radiometer-type application. In the proposed method, initially, the antenna is designed by the well-known Elliott technique. Subsequently, a perturbation approach is employed using a full-wave analysis technique. The analysis utilizes the method of moments solution to the pertinent integral equations for the aperture electric field of all slots. The radiating slots are perturbed by using numerically determined partial derivatives, while all the coupling slots are perturbed to maintain the relative excitations of the radiating waveguides, thereby improving the return loss. Convergence is reached within a few iterations. The method may be applied to large arrays made up of subarrays.
Published Version
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