Microstrip Leaky-Wave Antenna with Circular Polarization and Broadside Radiation

• Published in: IEEE antennas and wireless propagation letters Vol. 22; no. 9; pp. 1 - 5
• Main Authors: Ahmad, Ayaz, Mukherjee, Jayanta
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.09.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Broadside frequency; Circular polarization; Delay lines; Electric fields; Gain; High gain; Leaky wave antennas; Leaky waves; Microstrip; Microstrip antennas; open stopband; periodic leaky-wave antenna; Polarization
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2023.3283398

In this letter, a novel circularly polarized microstrip leaky-wave antenna is proposed with broadside radiation and high gain. A conventional microstrip patch has been modified to obtain broadside gain along with circular polarization. The modified patch is periodically placed along one side of the 50 Ω delay line to form leaky-wave antenna. The optimized broadside frequency of the antenna is 10.1 GHz. The bandwidth associated with 3-dB axial ratio is 13.3% while the maximum obtained gain is 15.8 dBic. The measured gain variation within 3-dB axial ratio bandwidth is 1.6 dB. Measured results of the fabricated antenna follow the simulations.