Microstrip‐fed monopole dumbbell‐shaped antenna for UWB application

Abstract

The monopole dumbbell‐shaped antenna fed by a 50 Ω microstrip line for ultrawideband (UWB) application is studied. By tuning the dumbbell‐shaped radiator and height of the feed gap (D), the monopole antenna has a 2:1 VSWR (return loss < 10 dB) from 2.89 to more than 15 GHz. The bandwidth covered 3.1–10.6 GHz, which has approved by the Federal Communications Commission as a commercial UWB band. Moreover, the antenna features near omnidirectional characteristics in the operation range and good radiation efficiency. The UWB, monopole characteristics of the antenna are confirmed experimentally. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1470–1473, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22404

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