Internal multiband monopole antenna for wireless‐USB dongle application

Abstract

Abstract An internal multiband monopole antenna for application in a USB dongle is proposed. The antenna consists of two metal strips which are constructed of a dielectric substrate and have a volume of 20 mm × 10 mm × 1 mm. The multiband characteristic is obtained by using a folded meander strip on the top side of the substrate, and the wideband performance in the lower band is achieved by connecting an inverted L‐shaped stub to the ground. The measured bandwidths were 26.1% (1.7–2.9 GHz) in the lower band for the DCS‐1800, US‐PCS, WCDMA, WiMax, 2.4 GHz‐WLAN, and S‐DMB bands and 15.5% (5.05–5.9 GHz) in the upper band for the 5 GHz‐WLAN band. Nearly omnidirectional radiation patterns and reasonable antenna gains were obtained in the desired frequency bands. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1786–1788, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24429