paper 150127070743

Abstract

In this paper, a tunable and reconfigurable circular slot antenna with frequency rejection characteristics is proposed for UWB communication applications. The proposed an- tenna can provide triple-band-notch characteristics by using various stubs designed to filter out unwanted narrowband signals whose frequencies overlap with those of the UWB band. Cen- ter frequencies of these notch bands are tunable, and tunability is realized by adjusting the dimensions of the proposed stubs. Also, the proposed antenna has a reconfigurable frequency rejection characteristic to render the designed antenna suitable for UWB, band-notched UWB, dual band-notched UWB, tri-band-notched UWB, or multi-band communication applications. Experimental results show that the proposed antenna can provide tunability over a wide range, excellent reconfigurable frequency rejection characteristics and good omnidirectional radiation patterns, which make it attractive for indoor UWB communication applications.

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Raj Mittra

Yingsong Li