Abstract
A wideband CPW-fed patch antenna is presented. It consists of the traditional CPW-fed patch antenna and a defective ground plane. The defective ground plane consists of 49 cross-shaped elements (7/spl times/7). The inductive CPW-fed structure (no patch element) with defective ground plane generates a first resonant frequency and the traditional CPW-fed patch antenna exhibits a second resonant frequency. Wideband operation is obtained by incorporating two resonant frequencies. The 10 dB return loss bandwidth of the proposed antenna could reach about 240 MHz (1.6-1.84 GHz), which is about 13% with respect to the central frequency of 1.8 GHz. Details of the proposed antenna configuration and experimental results are discussed.
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