Tunable and Reconfigurable Frequency Rejection Circular Slot Antenna for UWB Communication Applications

摘要

In this paper, a tunable and reconfigurable circular slot antenna with frequency rejection characteristics is proposed for UWB communication applications. The proposed antenna can provide triplc-band-notch characteristics by using various stubs designed to filter out unwanted narrowband signals whose frequencies overlap with those of the UWB band. Center frequencies of these notch bands arc 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.