Abstract
An ultra-wideband antenna with controllable band-notched is presented. Two semi-ellipses with different radiuses are subtracted to result in the main patch. By varying inner and outer radiuses, much more enhancement in bandwidth occurred. A U-shaped slot is used to make band-stop performance. Measured S11 is ≤-10 dB over 2.3 - 5 GHz and 6.1 - 15.1 GHz.
Highlights
As stated in Federal Communications Commission (FCC), the ultra-wideband (UWB) radio systems use the designated 3.1 - 10.6 GHz frequency band
Various UWB antennas with band-notched characteristic have been reported to avoid interferences, such as TwoL-shaped quarter-waveguide resonators coupled to the ground plane with two shorting tracks at the sides of the antenna [2], split ring resonator [3], U-shaped slots and E-shaped slot [4], rectangular slots and 4-shaped slots [5], inverted U-shaped slots and Hshaped slot [6], C-shaped slots [7], and multi-U-shaped slots [8]
A Ushaped slot is inserted in the patch that provides bandnotch performance
Summary
Received July 29th, 2013; revised September 2nd, 2013; accepted September 16th, 2013. License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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