Stepped-width planar monopole antenna with circular parasitic plane for wireless local area network/worldwide interoperability for microwave access applications



This article demonstrates a new and simple dual-band design for the planar monopole antenna.The design basically consists of a stepped-width radiating monopole element with a microstrip feedline for excitation and a circular parasitic plane for generating a resonant mode in the upper band. The measured impedance bandwidth for 10-dB return loss is from 1.98 to 3.22 GHz and 4.92 to 6.93 GHz, covering the 2.4/5.2/5.8-GHz wireless local area network bands and 2.5/5.5-GHz worldwide interoperability for microwave access bands. The measured radiation patterns are similar to typical monopole-antenna radiation characteristics. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:219–222, 2012; View this article online at DOI 10.1002/mop.26447