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In this paper, a novel broad-band slot antenna fed by CPW is proposed for wideband operation. By introducing annular slot and round corners, 81.5% impedance bandwidth of 10 dB return loss is achieved, and the center frequency is 8.75 GHz. The proposed antenna can provide broad BW for most part of C-band (5.18~8 GHz) and the whole X-band (8~12 GHz) operation. The BW is much wider than other slot antennas...
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