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A compact planar monopole UWB antenna with quadruple band-notched characteristics is analyzed and presented. By introducing a C-shaped slot, nested C-shaped slot in the radiating patch and U-shaped slot in the feed line, quadruple band-notched characteristics are achieved at frequencies of 2.5, 3.7, 5.8 and 8.2GHz. The proposed antenna has been fabricated and tested. Measured impedance bandwidth of the antenna is 2.35{12GHz, which covers Bluetooth and UWB band, for VSWR 2, for rejecting 2.5/3.5GHz WiMAX, WLAN and ITU 8GHz band signals, respectively. The average gain of this antenna is 4.30dBi with a variation of §1:8dBi over the whole impedance bandwidth. Signiflcant gain reduction over the rejected band is also observed. The antenna shows good omnidirectional radiation patterns in the passband with a compact size of 40mm £ 34mm.
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Sharma et al. (2014) studied this question.
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