A planar CPW‐fed slot antenna on thin substrate for dual‐band operation of WLAN applications

Abstract

AbstractThis article presents the design and fabrication of a coplanar waveguide (CPW)‐fed slot antenna on thin substrate for dual‐band operation of wireless local‐area network (WLAN) applications within 2.400–2.484 GHz and 5.150–5.350/5.725–5.825 GHz bandwidths. The prototype consists of a thin substrate and a CPW‐fed slot antenna. To obtain sufficient bandwidth with −10 dB return loss, a thin substrate layer is inserted under the ground plate and the radiator. A thin substrate CPW‐fed slot antenna that has a WLAN‐band is used. The important design parameters are the slot's construction, width, length, the substrate height, and the CPW‐fed gaps. From these optimized parameters, a CPW‐fed slot antenna is fabricated and measured. The measured results of the fabricated antenna are obtained individually, at 1.70 and 2.40 GHz bandwidths, with a −10 dB return loss referenced to the center frequency, and with the individual peak gains at 1.37 and 1.78 dBi. The experimental radiation efficiency in both the E‐ and H‐planes is shown to be a pass band total of 48–75%. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2799–2802, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24742