A High-Gain Dual-Circularly Polarized Parabolic Antenna for Mobile Base Stations

This paper presents a high-gain dual-circularly polarized parabolic antenna for mobile base stations, aiming to meet the point-to-point communication in emergency communication. The antenna operates 2.2-2.3 GHz and employs a circular-aperture parabolic reflector and a microstrip circular patch feed source. Dual circular polarization is achieved through an orthogonal coupler. Simulation and test results show that the antenna exhibits excellent performance. |S<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf>| and |S<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">22</inf>| are less than -16 dB, peak gain reaches 25dBi, and the axial ratio is less than 2. Additionally, half-power beamwidth of the antenna is approximately 71°-73°, and the front-to-back ratio is around 20 dB, demonstrating good radiation performance. This design excels in high gain, low reflection, and dual circular polarization, making it suitable for compact installation in mobile base stations and effectively improving signal transmission quality and coverage in emergency communication scenarios.