Comparative study of different Feeding Techniques for Rectangular Microstrip Patch Antenna

Abstract: A Microstrip Patch Antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. It is a narrowband, wide-beam fed antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate such as a printed circuit board with a continuous metal layer bonded to the opposite side of the substrate which forms a ground plane. It's various applications are biomedical diagnosis, mobile radio, remote sensing, wireless and satellite communications. A good impedance matching condition is required between the line and patch without any additional matching elements. This condition can be provided using various feeding techniques. In this paper, a comparative study between inset feed, microstrip feed and co-axial feed, on a rectangular microstrip patch antenna are done on the basis of S-parameter, Reflection gain, VSWR and Radiation Pattern using Hyperlynx 3D EM software.

Keywords: Microstrip patch antenna, feeding techniques, reflection gain, radiation pattern, VSWR, S-parameter, Hyperlynx 3D.