Analysis of spherical annular microstrip antennas

The spherical annular microstrip antenna is analyzed. The antenna is excited by a coaxial line. The general transmission line model (GTLM) is used to compute the input impedance. The radiating TM/sub 12/ mode is considered because of its wide band. The effect of the other radiating modes and the nonradiating modes on the TM/sub 12/ mode is investigated. The effect of different parameters on the input impedance is considered. The radiation patterns are computed using the method of moments.<
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