Double-frequency circularly-polarized hexagonal horn antenna for improving aperture efficiency of array plane

Abstract

The invention discloses a double-frequency circularly-polarized hexagonal horn antenna for improving the aperture efficiency of an array plane, and belongs to the technical field of microwave antennas. The antenna comprises a base, a transition body and a hexagonal pyramid which are coaxially and sequentially connected, and the base is in a short tube shape; the transition body is a trumpet-shaped hollow body, and spline curve transition from a small circle to a large circle is achieved; and the hexagonal pyramid is a hollow body in a hexagonal frustum shape, and transition from a circle to a hexagon is achieved. A traditional circular horn antenna is large in size, the gain needs to be improved, gaps exist when array plane arrangement is formed, and the aperture efficiency is low. Hexagonal horns can be uniformly arranged without gaps, the aperture efficiency is high, but the circular polarization is poor. The advantages of a circular horn and a hexagonal horn are combined, the gain is high, the size is small, the gain in a transmitting frequency band is larger than 13.6 dB, the gain in a receiving frequency band is larger than 17.4 dB, and the gain is increased by 1-3 dB; and when the array plane is formed, tight arrangement can be realized, and the aperture efficiency of the horn antenna array plane is greatly improved while the circular polarization is ensured.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a satellite-borne dual-frequency circularly polarized horn antenna. The main application direction is a dual-frequency circularly polarized feed source integrated with Ku / Ka frequency band transceiver in a satellite communication system. Background technique [0002] With the development of satellite communication technology, the application requirements of the antenna system for the Ku / Ka frequency band are getting higher and higher. In satellite communication, the transmission and reception work in different frequency bands, and the antenna needs to work in dual frequency. Antenna systems capable of transmitting and receiving circularly polarized waves have unique advantages in various complex environments. Circularly polarized waves have strong anti-interference capabilities. Observed along the propagation direction, the electric field vector rotates cloc...

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Problems solved by technology

[0005] In order to solve the problems that the existing dual-frequency circularly polarized horn antenna has large volume, low gain, and low array aperture efficiency, the present invention provides a dual-frequency circularly polarized hexagonal horn antenna for improving array aperture efficiency

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