Abstract
A new coplanar waveguide-fed slot antenna for ultrawideband (UWB) applications is presented. The proposed X-shape antenna is analyzed both numerically and experimentally. The UWB characteristics of the antenna are achieved through the electromagnetic coupling between two adjacent slot arms. All the design procedures are performed by using CST MS software. The antenna operates with VSWR lower than 2.2 (S11< -8.5 dB) over the whole frequency band from 3.1 GHz to 10.6 GHz. In addition to the return loss, dispersion characteristic of the antenna is considered in the design procedure. A parametric study is presented to investigate the effect of the antenna geometrical parameters on its performance. The antenna shows fairly stable radiation pattern over the frequency range of interest. Furthermore, to analyze the dispersion behavior of the antenna, the frequency-domain and time domain characteristics of the antenna are investigated by means of the antenna transfer function.
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