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A Small Dual-Band CPW-Fed Monopole Antenna for GSM and WLAN Applications

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4 Author(s)
Naser-Moghadasi, M. ; Faculty of Eng., Science and Research Campus, Islamic Azad University, Tehran, Iran ; Sadeghzadeh, R. ; Asadpor, L. ; Virdee, B.S.

A unique and miniaturized dual-band coplanar waveguide (CPW)-fed antenna is presented. The proposed antenna comprises a rectangular patch that is surrounded by upper and lower ground-plane sections that are interconnected by a high-impedance microstrip line. The proposed antenna structure generates two separate impedance bandwidths to cover frequency bands of GSM and Wi-Fi/WLAN. The antenna realized is relatively small in size $(17times 20 {hbox{mm}}^{2})$ and operates over frequency ranges 1.60–1.85 and 4.95–5.80 GHz, making it suitable for GSM and Wi-Fi/WLAN applications. In addition, the antenna is circularly polarized in the GSM band. Experimental results show the antenna exhibits monopole-like radiation characteristics and a good antenna gain over its operating bands. The measured and simulated results presented show good agreement.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:12 )