Simulative Investigations on Different Shapes of Antenna

Abstract

The goal of this thesis is to design and analysis the Microstrip patch antenna with different shapes which covers the Ultra Wide Band 2.42 GHz frequency. This thesis covers study of basics and fundamentals of microstrip patch antenna. How the different characteristics of the antenna depend on its various geometrical and other parameters, a series of parametric study were done to find it. The various geometrical parameters of the antenna are the dimensions of the patch and the dimensions of the ground planes and the separation between them. It also includes the dielectric constant of the substrate material. The parametric study also includes the study of different shapes to optimize the different parameters of antenna to get the optimum results and performance. This is a simulation based study. The design and simulation of the antenna is carried out using MATLAB (matrix laboratory) software which is a multi paradigm numerical computing environment and a high performance language for technical computing. In this paper, return loss curve, antenna gains, 3d pattern, directivity, azimuth pattern, elevation pattern and the far field results are shown for all the designed antennas. Various results reflect the good antenna performance in the UWB range of frequency. Then the effects of varying the parameters of the antenna on its performance are investigated and shown. In now a days it is essential for an antenna designed for a system to avoid the interference from the other existing wireless system. Effect of desired parameter modifications are observed, analyzed and plotted. All the design antennas are fabricated on an inexpensive dielectric substrate air with relative permittivity (?_r) of 1 with thickness of 0.006 mm. The simulation results of different shapes of microstrip antennas indicate that the proposed rectangular microstrip patch antenna achieve the more gain and directivity as compare to another two shapes (circular and triangular)