Radiation Pattern Analysis of a Fractal Micro-Strip Patch Antenna J.Prathyusha, B.Suresh

Abstract- There are number of methods that can be used to reduce the size of the antenna especially when it is too be used at lower operating frequencies. Fractal is one of the ways which can be used to miniaturize antennas due to their space filling ability. It helps in fitting large electrical lengths into small volume. In this paper the the radiation pattern of 1X4 array of micro-strip patch antenna over fractal geometry can be observed. Key words: Fractal antenna, micro-strip patch antenna, ADS software, returns loss The micro strip patch antenna has following advantages. i. They are low profile antennas. ii. They are easily comfortable to non planar surfaces. iii. They are very easy and inexpensive to manufacture in large quantities using modern printed circuit techniques. iv. When mounted to a rigid surface, they are mechanically robust. v. They are versatile elements in the sense that they can be designed to produce a wide variety of patterns and polarizations depending on the mode excitation and the particular shape of the patch used. Micro-strip Patch Antennas: A Micro-strip patch antenna is a thin square patch on one side of a dielectric substrate and the other side having a plane to the ground. The patch in the antenna is made of a conducting material Cu (Copper) or Au (Gold) and this can be in any shape, rectangular, circular, triangular, and elliptical or some other common shape. The basic antenna element is a strip conductor of length L and width W on a dielectric substrate with constant εr; thickness or height of the patch being h with a height and thickness t is supported by a ground plane. The rectangular patch antenna is designed so as it can operate at the resonance frequency. The length that is for the patch does depend on the height, width of the patch and the dielectric substrate