Small size uniplanar monopole antenna with triple-band operation

A small size (15 × 35 × 0.8 mm 3 ) coplanar waveguide (CPW) fed monopole antenna design with triple-band operation for WLAN (Wireless Local Area Network) and WiMAX (Worldwide Interoperability for Microwave Access) applications is proposed. The basic structure of this proposed design is a simple uniplanar C-shaped monopole loaded with two additional brand strips. From the measured results, the 10-dB impedance bandwidths of the three operating bands (f L , f M , and f H ) are 23.17% (2.175–2.745 GHz), 15.04% (3.32–3.86 GHz), and 37.91% (4.895–7.185 GHz), respectively. Furthermore, the three operating bands have also yielded peak gain and radiation efficiency of more than 0.69 dBi and 65%.