A U-Shaped Slot UWB Antenna with Flexible and Wide Tunable Dual Notch Band
College of Information and Communication Engineering, Harbin Engineering University, Harbin, China
A coplanar waveguide (CPW) fed ultra-wideband (UWB) antenna with flexible and wide tunable dual bandnotched characteristics is proposed in this paper. The dual band-notched function is achieved by using an U-shaped slot inserted into the ellipse radiation patch and by using an elliptic parasitic slit placed near the ground plane. The wide tunable band-notched characteristic is implemented by adjusting the length of U-shaped slot and by adjusting the length of ellipse parasitic slit. The design aims to achieve wide reconfigurable band-notched features on the UWB antenna. The simulated results indicate that the proposed antenna has a wide bandwidth (VSWR under 2) from 2.9GHz to 12.6GHz with fractional bandwidth of 125%, and has a wide tunable notch band center frequency from 4.5GHz to 12.4GHz.
Key words: Ultra-wideband / slot antenna / notch band / wide tunable / U-shaped
© Owned by the authors, published by EDP Sciences, 2016
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