CPW-FED shorted F-shaped monopole antenna for 5.8-GHz RFID application

A novel coplanar waveguide (CPW)‐fed F‐shaped planar monopole antenna obtained by embedding folded slots in a rectangular patch on a single‐layer substrate is proposed. To expand the impedance bandwidth and miniaturize the antenna size for suitable use in 5.8‐GHz radio frequency identification (RFID) systems, a branch of the F‐shaped antenna is shorted. The designed antenna including ground plane is only 16.8 mm in height and 13 mm in width and can operate in the 5.8‐GHz frequency band with measured impedance bandwidth and average antenna gain of 640 MHz and 4 dBi, respectively, as well as broadside radiation patterns. These properties make this antenna suitable for RFID tags. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 573–575 2006; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.21410