Abstract
In this communication we present a microstrip feed small square UWB antenna with enhanced bandwidth and dual rejection bands for WiMAX and WLAN application. The proposed antenna consists of a microstrip feed square radiating patch with W- and Π-shaped slot cut inside it and a partial ground plane with a pair of U-shaped slots, which provides large fractional bandwidth of more than 128% (3.05–14.1 GHz). W-shaped and Π-shaped slot cut inside square radiating patch are used to achieve dual band- rejection performance, which reduces the interference caused by all the 3.5/5.5-GHz WiMAX bands, 5.2/5.5-GHz WLAN bands and 4-GHz C-bands. The proposed antenna successfully simulated using CST microwave studio 2011. It has very small size 10×16 mm2. Simulated results shows that proposed antenna operates over the wide frequency range 3.05–14.1 GHz, defined by S11 < −10dB. The proposed antenna shows the satisfactory performance for UWB applications.
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