Band-notched ultra-wideband ring-monopole antenna

Abstract

A compact planar ultra-wideband ring monopole antenna with a band-notch feature is presented. The band-notch characteristic is achieved by embedding a quarter-wavelength tuning stub in the circular ring monopole. The notched band is controllable by adjusting the length of the tuning stub. The measured antenna radiation patterns show good omnidirectional performance across the operation bandwidth. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 125–126, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21283