Abstract
In this article, a miniaturized fork-shaped patch ultra-wideband (UWB) planar wide-slot antenna with dual band-notched characteristics is proposed. With fork-shaped patch, ultra-wideband impedance matching from 3.1 to 13.2 GHz is easily achieved. Then, two novel and simple methods are applied to solve the difficulty for UWB slot antennas with fork-shaped patch to realize band-notched characteristics. By etching one pair of I-shaped resonators on both branches of the fork-shaped structure and adding a rectangular single split-ring resonator in the rectangular openings of fork-shaped patch, the wireless local area network (WLAN) band from 5.5 to 6.1 GHz and the International Telecommunication Union (ITU) 8 GHz band from 7.9 to 8.7 GHz are rejected, respectively. The coplanar waveguide-fed UWB antenna is successfully designed, fabricated, and measured. The measured and simulated results show a good agreement. The antenna provides nearly stable radiation patterns, high gains and high radiation efficiency.
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