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A resonant feeding loop is used to obtain the desired wideband impedance characteristic. Two implementations are presented and their efficiency characteristics are compared: a low-admittance resonant feeding loop and a high-admittance resonant feeding loop. Experimentally it is demonstrated that the low-admittance feeding loop provides better radiation efficiency than the high-admittance feeding resonant...
A compact triple-band ground radiation antenna for GPS, WiFi 2.4 and 5 GHz band operations in mobile terminals is proposed. Within a considerably small area of 12 × 6 mm, by employing the inductive excitation concept of characteristic radiation modes on a mobile terminal chassis, impedance bandwidths of 21, 210, and 1820 MHz are achieved, covering the GPS, WiFi 2.4 and 5 GHz bands, respectively, at...
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