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In this article, we propose a circular slot ultrawideband (UWB) antenna with multimode reconfigurable dual band-notched characteristics. By using a two-stage T-shaped stepped impedance resonator (TS-TSIR) and a parallel stubs loaded resonator (PSLR), dual band-notched function is achieved to reject worldwide interoperability for microwave access, WLAN, and X-band signals. The multimode reconfigurable band-notched characteristic is realized by integrating four switches onto the TS-TSIR and the PSLR. Simulated and measured results show that this antenna, with multimode reconfigurable characteristics and dual band-notched function, can operate from 2.7 to 12 GHz (VSWR<2), which includes the entire UWB band. This antenna maintains omnidirectional radiation patterns that is suitable for UWB applications. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:570-574, 2014 [ABSTRACT FROM AUTHOR]

ABSTRACT In this article, a wide-slot ultrawideband antenna with dual band-notch characteristics is proposed numerically and verified experimentally. The dual band-notch functions are obtained by using a nested split ring resonator (NSRR) and a stepped impedance resonator (SIR). The designed two notch bands are tunable by adjusting the dimension of the NSRR and the SIR. Simulation and measurement results agree well. The proposed antenna with omnidirectional radiation patterns and desired notch bands is suitable for UWB communication applications. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2827-2830, 2013 [ABSTRACT FROM AUTHOR]

A reconfigurable wide slot antenna integrated with stepped impedance resonators (SIRs) and ideal switches for ultra-wideband (UWB) and multiband communication applications is proposed. The proposed reconfigurable antenna can be used as a UWB antenna, a dual notch-band UWB antenna, and multiband antennas. The dual notch-band functions are obtained by using two stepped impedance stub-loaded SIRs. The reconfigurable characteristics are achieved by using two ideal switches on SIRs. The measurement and simulation results show that the proposed reconfigurable antenna has good switchable characteristics and dual notch-band functions. The designed reconfigurable antenna is suitable for future multimode wireless communications systems. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:52-55, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27253 [ABSTRACT FROM AUTHOR]