A novel microstrip-fed slot antenna with triple-band operation in compact size is proposed. The proposed antenna structure consists of a L-shaped microstrip feed line and open-ended slot on the ground plane, having small overall size of 14 £ 34mm 2 . The open- ended slot constructed of crossed double T-shaped slots is aimed to obtain resonant modes at 2.4/3.5GHz. Meanwhile, with the use of a via-loaded metal patch connected to the edge of ground, the upper resonant frequency point at 5.8GHz is achieved. The numerical and experimental results exhibit the designed antenna operates over triple frequency ranges, fulfllling the standards of 3.5-GHz WiMAX and 2.4/5.8-GHz WLAN. In addition, acceptable radiation characteristic is obtained over the operating bands.
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Ren et al. (2011) studied this question.
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