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This letter presents a microstrip-fed antenna that is small, low-profile, planar, and suitable for WLAN/Bluetooth and ultrawideband (UWB) applications. The antenna occupies an area of 16times18 (mm) on a printed circuit board (PCB) and exhibits dual-band operation at 2400-2484 MHz (Bluetooth) and 5150-5825 MHz (IEEE 802.11a and HiperLAN/2) bands with satisfactory radiation properties. The 10-dB return loss bandwidth of the antenna at high-band spans from about 4.5 GHz to about 11 GHz
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Bahadır S. Yildirim (2006) studied this question.
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