Multilayer parasitic microstrip antenna array for WiMAX application

This paper presents the design of a multilayer parasitic microstrip antenna array concerned on enhancement of gain at 5.8 GHz for WiMAX application. The proposed structure of this project is microstrip patch antenna array which is composes of three layers using different material substrate. The substrate for the first layer consists of Flame Retardant 4 (FR-4) that has thickness 1.6mm while the second and third layers are 3mm thickness using foam substrate. The first layer is a driven element while second and third layer are 2 by 2 parasitic patch elements. The multilayer microstrip antenna array was design and optimized using Computer Simulation Tool (CST). The simulation results show the enhancement of gain is increased about 62.3% when adding the parasitic element. The gain before adding the parasitic element is 2.012 dB and after adding the parasitic elements is 8.656 dB. The performance of the designed antenna is to test for return loss, Voltage Standing Wave Ratio (VSWR), bandwidth, directivity, radiation pattern and gain.