Gain improvement of a wideband monopole antenna with novel artificial magnetic conductor

Abstract

A coplanar-waveguide fed monopole antenna over a new artificial magnetic conductor (AMC) for WLAN and WiMAX applications is presented. Artificial magnetic conductors are utilized as in-phase reflectors for improving the radiation performance of the printed monopole antennas. The AMC structure is composed of U-slot loaded square patches printed on grounded dielectric substrates. The AMC operates at dual frequency bands of 3.3 and 5.5 GHz. It is demonstrated that the antenna gain increases by about 6.0 dB and 3-dB gain bandwidth of 2.16-6.0 GHz when the AMC is used.