Enhancement of bandwidth through a sandwich e-shape between multilayer structure / Zanurlida Tengah

This thesis presents a comparative study of the performances between single layer patch antenna and patch antenna with a sandwich E-shape between multilayer structure. The design process of these antennas were using Computer Simulation Technology (CST) Microwave Studio software. The type of substrate used for both antennas was R03003 substrate with the relative permittivity, er= 3 and thickness, h= 0.5 mm and h~ 0.75 mm. These antennas were designed to resonate at frequency 2.4 GHz. This study was focusing on enhancing the bandwidth and at the same time increased the value of return loss, gain and directivity of the antenna. The simulation results show that the bandwidth of patch antenna with a sandwich E-shape between multilayer structure was increased by 61.74% compared to single layer patch antenna. The return loss, gain and directivity were also increased by 34.02%, 21.95% and 1.07% respectively. For multilayer with a sandwich E-shape patch antenna, the usage of thicker substrate was also enhanced those parameters by 6.66%, 37.34%, 21.68% and 5.08% respectively. Nevertheless, the usage of wider sandwich E-shape dimension was only increased the values of return loss, bandwidth and directivity by 5.10%, 1.24% and 0.05% respectively but decreased the value of gain by 0.59%.