A dual-frequency small microstrip antennaA dual-frequency small microstrip antennaS.C. GPO*,L.W. Li, T.S. Yeo, and M.S. Leong Department of Electrical and Computer Engineering National University of Singapore, Singapore, 1 19260Abstract. In this paper, a novel dual-frequency compact antenna, which uses an H shaped microstrip patch loaded with shorting pins, is proposed and studied. This antenna can achieve both a significant reduction of antenna size and a dual-frequency operation with a single feed. More freedoms for tuning the resonant frequencies, the ratio of two resonant frequencies, and the input impedance are available due to more design parameters. A detailed parameter study is performed and the theoretical analysis is based on the finite-difference time-domain (FDTD) method. The effects of several antenna parameters on……
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