Analysis of Impact of Circular Cut on Microstrip Patch Antenna at 2.49 GHz for S Band Application

摘要

In this paper, the impact of circular cut on the geometry of microstrip patch antenna is analyzed. Initially, the geometry of microstrip antenna is prepared for the 2.49 GHz central frequency with the bandwidth of 50.4 MHz which is one of the operational bands of IRNSS receiver. In this band, it provides very low return loss and RHCP around 2.0 which is suitable for IRNSS receiver second band of operation 2.49 GHz. This antenna is fed by coaxial probe with proper impedance matching. Different circular cuts alter the key properties of this antenna. So, the comparative analysis is done by changing the radius of cuts at two diagonal angles at patch geometry to analyze the variation in important parameters of microstrip patch antenna.