Modeling and design of high gain microstrip antennas with hfss

The expansion of multiple communications and coverage in the new generation of communication networks has increased the need for high-gain antenna models. Microstrip antennas are mostly preferred for applications such as space and satellite technologies, radar systems, wireless communication and Internet of Things (IoT). The problem of low gain and narrow bandwidth in microstrip antennas can be solved by selecting special insulating materials and optimizing the geometric structure. In this thesis, general structure, properties, feeding and analysis methods of microstrip antenna have been investigated in order to obtain high gain. For this purpose, ANSYS HFSS (v.15) which is a commercial software that solves electromagnetic structures by finite element method was used in modeling and design steps. In this context, high gain microstrip antenna designs supporting GSM 1800, WLAN, Wi-MAX, ISM 5.8 and X band technologies were focused on. Different dielectric materials such as Rogers, RT Duroid, FR4 were selected and the geometric structure of the microstrip antenna (parasitic patch insertion, grooving and array elements) were studied to achieve high gain. The prototypes of the sample antennas, whose design models were completed with HFSS, were produced and then the prototypes were measured with vector network analyzer and their output characteristics were evaluated. It was observed that the measurement and simulation results of these antennas were compatible and comparable.