Abstract
A new type of ultra-wideband (UWB) antenna with a dual-notched frequency band, compact size of 21 × 28 mm2 and a coplanar waveguide (CPW) fed is proposed in this article. Two notched frequency bands are obtained by embedding two U-shaped slots in the radiation patch and a rectangle slot in the ground plane, which can be controlled by adjusting the length of the responding slots. The frequency domain characteristics are investigated and measured. Both the experimental and numerical results show that the proposed antenna has an impedance bandwidth ranging from 3.1 GHz to more than 11.0 GHz in which voltage standing wave ratio is less than 2, expect two notch frequency band, 5–6 GHz (WLAN) and 7.7–8.5 GHz (X-band for satellite communications in China).
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