Implementation and Comparison of Microstrip Patch Antenna and Co-Planar waveguide Antenna

The aim of this work is to design a microstrip patch antenna (MPA) and coplanar waveguide antenna (CPW) and then compared the performance of both antennas. The performance metrics, on the basis of which the antennas are compared, are gain, directivity, radiation efficiency and return loss. The center frequency is 5.5GHz which is fixed for both antennas and the material used as substrate is Roger RT 5880.  The directivity of microstrip patch antenna is 7.742dBi and that for coplanar waveguide is equal to 2.735dBi. The radiation efficiency of MPA is -1.758dB and for CPW is 0.051dB.  The antennas are designed using CST MWS.