Dual-band CPW-fed G-shaped Monopole Antenna for 2.4/5GHz WLAN Application

摘要

A novel planar monopole antenna with dualband operation suitable for WLAN application is presented in this paper. The antenna resembles as a "G" shape from combining two folded strips and is fed by a coplanar waveguide (CPW) transmission line. By optimally seffecting the antenna dimensions, dualband resonant modes with a much wider impedance matching at the higher band can be produced. Prototypes of the obtained optimized design have been constructed and tested. The measured results explore good dualband operation with-10 dB impedance bandwidths of 9.7% and 62.8% at bands of 2.43 and 4.3 GHz, respectively, which cover the 2.4/5.2/5.8 GHz WLAN operating bands, and show good agreement with the numerical prediction. Good antenna performances such as radiation patterns and antenna gains over the operating bands have also been observed.