International Symposium on Antennas and Propagation
Studies of a CPW-Fed Multiple-Branch Multi-Band Antenna
Feng-Jui Tsui, Ching-Lieh Li, Lung-Huei Duan,
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For systems of personal communication services (PCS), there are continuous needs for dual-band/multi-band planar antennas because of the various services available and the limited space on the portable devices . In recent years, there had been researchers employing the multiple branch structures to obtain the multi-band operations desired [2-3]. In this paper, a novel CI-shaped multiple-branch monopole antenna is introduced in order to achieve multi-band operations that cover the GSM 900, GSM 1800/1900, and the 2.4GHz ISM bands with return-loss less than -10dB. The proposed antenna is fed by a 50? coplanar waveguide (CPW) transmission line to benefit from the simple structure of single metallic layer and other attractive features such as wide bandwidth, no soldering point needed, and easy integration with active devices , while the multi-band characteristics of the proposed antenna are carefully studied and experimentally verified.