Analysis of small microstrip patch antennas for mobile communication

Abstract

This work presents the analysis and design of small microstrip patch antennas that can be used in mobile communication using Finite Difference Time Domain (FDTD) method. The formulation of the FDTD algorithm is described along with its fundamental properties. At the beginning, the method is applied to the arbitrary shaped patch; and the radio-electric properties of the considered microstrip patch antennas are formulated. The method is then applied to some known structure shapes working in high microwave frequency bands; the shapes include rectangular (dipole), annular-ring and semi-ring patches. Different feeding methods (Microstrip line feed and coaxial line feed) are used to energize the considered antennas. The input impedance (VSWR), the return loss, and the far field radiation patterns calculated with the aid of FDTD method and compared with the results obtained with the HFSS simulator. Due to the nature of the chosen method, a new shape of patch is designed and analyzed. The new structure is named Berber-Z patch antenna taken from “TIFINAGH” Berber alphabet. The obtained results are Validated the HFSS simulator