Comparison of Feeding Modes for a Rectangular Microstrip Patch Antenna for 2.45 GHz Applications

摘要

A microstrip patch antenna consists of a metal patch on a substrate on a ground plane. Different feeding modes are used such as: coaxial probe feed, microstrip line feed, proximity-coupled feed, and coplanar wave guide feed (CPW). The patch can take different shapes to meet various design requirements. The most known forms are rectangular, square, circular, hexagonal... The microstrip patch antenna is low-profile, conformable to planar and nonplanar surfaces, simple and cheap to manufacture using modern printed-circuit technology. There are many methods of analysis for the microstrip patch antennas. The most popular models are the transmission-line, cavity and full wave methods. In this paper, a microstrip patch antenna for 2.45 GHz applications is designed based on the transmission line method. The design is optimized with the Method of the Moments (frequency domain method) because it's one of the accurate methods for wire and planar antennas. Also, the four feeding modes are simulated and compared.