Triple-band CPW-fed L-shaped monopole antenna with small ground plane

This article presents a CPW-fed planar monopole antenna with a small ground-plane size. The monopole antenna is a triple-band design and is meant for mobile handsets with WiFi and WiMAX features. The planar structure comprises an L-shaped monopole backed by a stubloaded open-loop resonator. The proposed antenna features three bandwidths of 2.25–2.62 GHz, 3.25–4.97 GHz, and 5.2–6.30 GHz, which yielded the maximum gain of around 1 to 2 dBi. Reduction effects of ground-plane on antenna’s performance rectified by the parameters of open-loop resonator are also investigated. The overall dimensions are 46 (W) _ 34 (L) _ 0.8 (d) mm3