DESIGN OF HIGH BANDWIDTH COMPACT ANTENNA

Abstract

ABSTRACT Microstrip antenna have many well known advantages. However “Narrow Bandwidth” is their main limitation on their use .It presents a difficult problem when our application also requires a small size of antenna with wider bandwidth. The present thesis “Design Of High Bandwidth Compact Antenna”aims to develop designs for small size wideband microstrip antenna by optimising geometry, using ground planes and short circuits. Drastic size reduction is possible by using high permittivity substrates, shorting pins or modified geometries, but have penalties on bandwidth, gain and efficiency. The proposed work aims to achieve the wide bandwidth by electromagnetically coupling the two shorted coplanar patches, and by inserting slots into the patch. The designs uses two electromagnetically coupled coplanar patches, where one is driven and other is parasitic. By connecting shorting pins from the patch antennas to the ground plane, the size of the patch can be reduced by one half or ...