By using of a new coplanar waveguide feeding (CPW feeding) technique to a planar sleeve monopole, a narrow width antenna with uniplanar structure is proposed for dual band operation at UMTS (1.885-2.200GHz) and HIPERLAN2 (5.470- 5.725 GHz) bands. Proposed antenna has considerable narrow width (width of 7.8mm) and simple structure. The antenna radiation pattern is almost as the radiation pattern of a monopole antenna and the gain remains nearly constant within UMTS and HIPERLAN2 bands. The antenna is suitable for application to wireless communication systems.
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