Design and Implementation of a Multiband Quasi-Yagi Antenna

In this paper, a coplanar waveguide-fed planar monopole antenna for multiband operations is presented. The antenna consisting of a multistrip Quasi-Yagi element and a coplanar waveguide to coplanar slot fed line, and the electric fields at the coplanar slot line can be excited through the CPW feed line. The proposed antenna can be used in multiband operations with directional radiation patterns. It generate four resonant frequency bands determined by -10dB reflection coefficient, it can cover number useful wireless communication systems; the structure plan of the antenna facilitates its integration with the other circuit components.