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This 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 [ABSTRACT FROM AUTHOR]

This paper presents the characteristics of the miniaturized Z-shaped meander-type antenna realized for 5.25-GHz wireless LAN systems. The proposed antenna consists of the modified meander line, corrugated shape, and shorting pin with coaxial feeding on the two-layered (air and FR4) substrate, which forms the letter “Z.” This proposed antenna has equivalent performance with about 44.87% of size reduction with respect to conventional antennas. Its maximum measured impedance bandwidth (-10-dB below) is approximately 300 MHz (5.05–5.35 GHz) or 5.76%, which meets to the bandwidth requirement of WLAN (5.15–5.35 GHz) systems. Details of the proposed antenna are described and experimental results of constructed prototypes also are presented. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1269–1271, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21673 [ABSTRACT FROM AUTHOR]