Characterization of lens antenna in wireless communication applications / Norsyahirah Izzati Zaidi

This paper presents a design of lens antenna in wireless communication system. The main focus of this project is to design lens and analyze the lens behavior in lens antenna. Besides, the factor that influence the design of lens and gain of lens antenna is investigated. Antenna is use to receive and transmit signal. Antenna with high gain will allow good signal to be transmitted. However, conventional antenna has low gain. Therefore, to increase the gain of the system lens antenna is designed. The performance of system gain is monitored. Simulation is performed in CST Microwave Software. There are three basic shape of lens is studied in this project and the lens are flat lens, concave lens and convex lens. Preliminary work is done in order to find out the best lens shape that will provide the higher gain. As a result, convex lens shows the highest gain and for that reason convex lens will be the project lens design. Next, optimization of the convex lens. The optimization parameters are distance between lens and feed, edge of lens and thickness of lens. Thickness of lens will be tested in two method. The first method is thickening the outer surface of lens. Then the second method is thickening the inner surface of lens. At the end of the experiment, the system gain showed an increment from 8.782 dB to 11.07 dB. The new lens design is obtained and those optimization parameters above influence the gain performance.