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A small loop antenna for WLAN applications is proposed, which is comprised of an inverted-L loop and an inner rectangular loop achieving dual-band resonances within a compact size of 4.5 mm × 6.5 mm. A series capacitor in the feeding loop is employed for impedance matching of both bands and a shunt capacitor for high band, respectively. The proposed compact antenna is able to achieve −10 dB impedance...
A loop-type ground antenna formed by connecting a capacitor between two ground points is described. The resonant frequency of the ground loop is conveniently controlled by changing the capacitance. The proposed loop-type radiator is excited by conventional shorting line loop feeding that may include an inductor. A loop type ground antenna is designed for Bluetooth and Wi-Fi applications.
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