volume | PIER Journals

Abstract

An ultra-wideband (UWB) antenna with dual band notched characteristics verified by characteristic mode analysis (CMA) is presented. The intended UWB radiator is etched on a Rogers RT5880 substrate with a size of 29×35×0.764 mm³, operating over a spectrum of 2.66-14.86 GHz with a fractional bandwidth (FBW) of 139%. Dual notched bands at WiMAX (3.01-3.63 GHz) and WLAN (4.48-5.85 GHz) are achieved by embedding L-shaped stubs in the notched rectangular patch. In addition, the two notched bands of the reported antenna are verified by using characteristic mode analysis (CMA) in terms of modal significance (MS) and characteristic angle (CA). The reported antenna's simulated and tested results are well matched to obtain S₁₁, VSWR, stable radiation patterns, a stable peak gain of 2.65 to 3.6 dBi and the maximum radiation efficiency of 97.86% in frequency domain, which makes the intended radiator suitable for portable UWB applications.

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Dr. Grandhi Venkata Subrahmanyam

Prof. Sri Rama Krishna Kalva