Compact Printed Monopole Antenna with Super-wideband

A compact semi-elliptical patch antenna fed by a tapered coplanar waveguide (CPW) is presented. The simulated and experimental results demonstrate that the antenna possesses the desirable super-wideband (SWB) characteristics, achieving a ratio bandwidth of 19.7:1 for VSWRles2, and exhibits a nearly omni-directional radiation pattern, while its area is only about 0.15 lambda1 times 0.2 1 lambda1, where lambda1 is the wavelength of the lowest operating frequency.