Broadband dual-frequency cross-shaped slot CPW-fed monopole antenna for WLAN operation

Abstract

A cross-shaped slot is introduced in a planar monopole antenna fed by a coplanar waveguide (CPW) in order to achieve broadband dual-frequency operation. This slot-loaded technology can compact the antenna size and lead to good impedance matching in a wide dual-band covering 2.4/5.2/5.8-GHz WLAN operations. Prototypes of the proposed antenna are constructed and tested. Good radiation characteristics of monopolelike patterns, 20% and 37% bandwidths, and 3.8-dBi and 5.7-dBi peak antenna gains for the lower and upper bands, respectively, have been obtained. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 353–355, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20985