A Review Paper on Circularly Polarized Microstrip Antennas (CPMAs)

Abstract

A survey on circularly polarised microstrip antennas and their historical perspectives is defined in this paper. As one of the regular planar antennas, circularly polarised microstrip antennas have been extensively studied in the last few decades. In radar and wireless communication systems, circularly polarised microstrip antennas are widely used because they allow the transmitter and the receiver to be flexibly focused. Owing to their narrow circularly polarised radiation (3-dB axial ratio) and impedance bandwidths, most of them cannot be used in ultra-wideband (UWB) applications.To improve the desired level of performance parameters such as resonance frequency, gain, directivity, radiation efficiency, and antenna efficiency for the dual resonance, there are many techniques for designing circularly polarised microstrip antennas. Circularly polarised microstrip antennas, literature review, simulation tools, benefits and drawbacks over traditional microwave antennas and applications are listed in this letter. The comparative analysis of several circularly polarised methods of microstrip antenna design used by researchers is also discussed in this paper.