Abstract
A simple printed ultrawideband (UWB) antenna with reconfigurable band-rejected characteristics is proposed. The antenna was fabricated on an FR-4 epoxy substrate and has a volume of 40.0 × 32.0 × 1.0 mm3. The simulated and measured results show that the antenna has nearly omnidirectional patterns, stable gain, and an available impedance bandwidth of 9.38 GHz which covers 2.34–11.72 GHz. By etching two slots in the radiator, band- notched features centered at 3.5 and 5.5GHz are achieved. With adding two microelectromechanical system switches across slots, the band-rejected characteristics can be reconfigurable and the proposed antenna is capable of operating among none or single or dual band-notched modes. Meanwhile, to discuss the mechanisms of the band-rejected properties, the conceptual equivalent circuit models are presented. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2401–2405, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27061
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