Design of Cavity Model Microstrip Patch Antenna

Abstract

Design and realization of LINEARLY POLARIZED AND DUAL FREQUENCY RECTANGULAR MICROSTRIP PATCH ANTENNA in S band at 2.42 GHz is reported in this project paper. It is shown that the design adopted for different antennas is quite accurate. By using the conventional MIC fabrication technology compact, light weight microstrip antennas can be realized. The desired narrow band is achieved for the microstrip antennas. Antennas are designed and fabricated on the substrate of dielectric constant 4.22 and thickness 1.6mm. Simulation is done using the microwave software to achieve the desired results.At a frequency of 2.42 GHZ return loss is -27.0 dB.  Also from smith chart it is seen that at a frequency of 2.42 GHz impendence offered by the antenna is resistive as well as inductive.   From VSWR plot it is seen that VSWR offered by the antenna is 1.1 at a frequency of  2.42 GHz.

Keywords:Cavity model, VSWR, return loss, smith chart.