Design and Performance of a Circularly Polarized Planar Microstrip Antenna with Improved Gain

This paper presents a simulated circularly polarized microstrip patch antenna resonating at a frequency of 2.4 GHz for wireless applications. We insert a reflecting surface over the antenna to improve its gain. The frequency bandwidth is 70.5 MHz and its return loss is −30.7676 dB at a frequency of 2.4 GHz. The axial ratio is less than 3 dB, which is 1.3202 dB, which shows a circular radiation pattern. The maximum gain of the antenna is 5.6083 dB without a reflector at the proposed frequency. We have used HFSS software for the simulation of the proposed antenna.