All-metal four-arm equal-angle spiral circularly-polarized antenna

Abstract

The invention provides an all-metal four-arm equal-angle spiral circularly-polarized antenna. The all-metal four-arm equal-angle spiral circularly-polarized antenna comprises an all-metal equal-anglespiral-structure radiation arm, a metal reflecting cavity, a coaxial feeder and a cylindrical resonant cavity, wherein a single coaxial feeding probe perpendicular to ground is used as coaxial cable feeding and is connected with a central metal feeding round ring, parallel feeding is performed by a pair of upper dipole arms of the metal feeding round ring in the radiation arm, a pair of lower dipole arms which are arranged in parallel are connected with grounding ends coaxial to each other, so that space positions of the four dipole arms and electromagnetic waves on the arms are in orthogonality to form a condition required by circular polarization. In order to solve the problem of unbalanced feeding of a coaxial line, the coaxial feeder is designed to be a coaxial taper balun structure, so that a load is matched with feeder impedance; in order to achieve the function of unidirectional radiation of the antenna, the metal radiation cavity is additionally formed in a back part of the antenna; and the all-metal four-arm equal-angle spiral circularly-polarized antenna has the characteristics of wide frequency band, small size, high gain and the like, can be embedded and is applicable to the field of a modern communication system and electronic countermeasures.

Description

Technical field [0001] The invention relates to the field of modern wireless communication technology, and more specifically to an all-metal four-arm equiangular spiral circular polarization antenna unit. Background technique [0002] As the performance of military equipment and aerospace vehicles continues to move toward high precision and high speed, higher requirements have been placed on the quality of antenna real-time communication. High-efficiency, real-time, anti-interference, and high-capacity communication antennas will become the general trend of antenna research and development in the future. Circularly polarized antennas combine significant rain and fog, anti-electromagnetic interference, anti-multiple aperture attenuation and other characteristics, and have been widely used in fields such as unmanned driving technology, remote video communications, global positioning systems, and signal shielding. [0003] The spiral structure antenna is widely used due to its wide f...

AI Technical Summary

Problems solved by technology

However, most of the existing helical antennas currently use microstrip antennas. Microstrip antennas are not easy to realize the broadband function, the efficiency is low, the medium is easy to wear, and the environmental adaptability is not as good as that of metal conductors.

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