DESIGN OF DUAL BAND MICROSTRIP PATCH ANTENNA FOR WIRELESS APPLICATION USING METAMATERIALS

Abstract

With the modem increase in the use of microwave frequencies in communication and radar applications, certain antenna performance requirements are needed and should be an integral part of the design process. Moreover wireless application require an antenna that is small in size ,low in cost and weight, easy to design, and can perform efficiently at two distinct band of frequencies that may be separated far apart.The purpose of this research was to design a dual band patch antenna. This prototype antenna design was targeted at dual band for WIMAX applications at 3.5 GHz (3.4 to 3.6) and 5.8 GJz(5.25 to 5.825) GHz.Patch antenna size reduction, satisfactory Gain and Radiation pattern over these two wide bandwidths are also an important concern. Various technologies have been developed to fulfill these. requirements such as Substrate Integrate Waveguide (SIW), Photonic Band Gap Structures (PBG),Defected Ground Structures,Electromagnetic Metamaterial structures and so on. The application of Metamaterials in the field of microstrip patch antennas has been used to enhance its performance like increasing directivity, gain, size reduction as well as in realization of beam scanning antennas. To realize a dual band operation for simultaneous WiMAX application at 3.5 GHz and 5.8 GHZ, a modified F slot loaded metamaterial inspired microstrip patch antenna loaded with CSRR has been proposed. The antenna was designed based on the simulations from CST V9.The results from the simulation and measurement for these proposed antenna are presented, compared, and used as part of the validation process for the dual band operation. This designed were optimized using Particle Swarm Optimization (P SO) technique in built in CST Microwave Studio V9.