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DESIGN OF NOVEL CPW CROSS-FED ANTENNA

By S. Lin, G. -l. Huang, R. -n. Cai, X. Y. Zhang and X. Q. Zhang

Abstract

Abstract—A novel coplannar waveguide (CPW) cross-fed antenna which is wideband, high-gain and omnidirectional is proposed. After simulating the antenna model by CST MICROWAVE STUDIO R©, the results show that this antenna not only has compact size, but also can effectively broaden operating band, improve gain and remain omnidirectional. In addition, adjusting antenna elements ’ dimension and spacing can control the central frequency position of operating band and bandwidth. The simulated results of antenna surface currents can be used to explain the reason of antenna possessing broadband and omnidirectional high-gain characteristics. A CPW cross-fed antenna operating at 2.4GHz is designed and manufactured for measurement. The prototype is printed on a FR-4 epoxy resin board with 1mm thickness. The experimental results indicate that the operating band is 2.35–2.85GHz with reflection coefficient less than −10 dB (relative bandwidth 19.2%), and maximum gain in H-plane can achieve 5.2 dBi. Measured results well match the simulated ones. Moreover, the total antenna size is 187mm × 22.5mm (1.5λ × 0.18λ), which can make it suitable in WLAN systems. 1

Year: 2011
DOI identifier: 10.2528/pierc11070107
OAI identifier: oai:CiteSeerX.psu:10.1.1.1013.3946
Provided by: CiteSeerX
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