This paper presents an efficient approach for the evaluation of the RCS of an arbitrarily shaped microstrip patch antennas on ferrite substrates. The direction of the dc magnetization of the ferrite is assumed arbitrarily in Θ andΦ. The analysis is based on a 3-D full wave analysis using method of moments. The excitation vector is formulated in a closed form using the transmission matrix approach. An excellent agreement with previously published results has been achieved.
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