Wide dual-band CPW-fed slot antenna

Abstract

A novel wide dual-band design of a coplanar waveguide (CPW) fed antenna is proposed. By using a double C-shaped metallic strip embedded in a big rectangle slot and an inserted tuning strip, the dual-band resonances of the antenna are generated. Good impedance matching condition at the two separated wide frequency bands is achieved by using two pairs of tuning strips at the double C-shaped strips and a pair of symmetrical slots. The measured results show good dual-band operation, with −10 dB impedance bandwidths of 900 MHz (1.97–2.87 GHz) and 3.22 GHz (4.87–8 GHz) at the two frequency bands, and average antenna gains of 3.2 and 4 dBi, respectively. Monopole-like radiations with small cross-polarisation patterns over the operating bands have been obtained.