Use of ultrawideband (UWB) signals holds great promise for reliable wireless communications at high data rates. In 2002, the U.S. Federal Communications Commission (FCC) designated the frequency band from 3.1 to 10.6 GHz for commercial use of UWB communications technology, prompting researchers to explore different antenna designs for that frequency range.1-4 Today, researchers continue that pursuit, recently developing a compact monopole antenna with a single-slotted ground plane and stepped rectangular resonator structure. It measures just 20 × 15 mm2 and achieves VSWR of less than 2.00:1 from 2.65 to 10.00 GHz...
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