Compact printed ultra-wideband slot antenna with a band-notched operation

Abstract

A compact printed ultra-wideband (UWB, 3.1-10.6 GHz) circular-slot antenna with a notched frequency band at 5 GHz is presented. The antenna is a uniplanar structure and occupies a compact area of 25 × 26 mm2 only (the side length is less than 27% of the lower edge frequency at 3.1 GHz). The antenna has a U-slotted circular stub embedded inside the circular slot. By choosing the length of the U-slot cut in the circular stub to be about a half-wavelength of the desired notched frequency, band-notched UWB operation is obtained. © 2005 Wiley Periodicals, Inc.