Non-contact ultra-wideband waveguide rotary joint, control system, method and application

Abstract

The invention belongs to the technical field of communication and radar antenna system components. The invention discloses a non-contact ultra wide band waveguide rotary joint, a control system, a control method and application, an arc surface periodic metal convex body array is designed outside a coaxial transition section, a rotatable non-contact electromagnetic band gap structure is formed by matching with a shielding cavity, broadband electromagnetic shielding is realized under a proper size, and non-contact rotatable coaxial transition is formed; electromagnetic signal transmission between the fixed waveguide and the rotary waveguide is achieved through broadband terminating type and orthogonal type coaxial-waveguide conversion, and the L-shaped waveguide rotary joint is achieved in cooperation with a bearing. According to the invention, a rotatable broadband non-contact electromagnetic band gap structure is constructed at the rotating part, so that good electromagnetic transmission performance of the rotating joint is ensured, the working bandwidth can completely cover the corresponding waveguide main mode bandwidth, and the non-contact structure avoids structural wear of therotating part, so that rotation is more stable, and the service life is longer; and the joint can be widely applied to various communication, radar and antenna feed systems.

Description

technical field [0001] The invention belongs to the technical field of communication and radar antenna system components, and in particular relates to a non-contact ultra-broadband waveguide rotary joint, a control system, a method and an application. Background technique [0002] Today, rotary joints are important components in communication and radar antenna systems. In order to realize the continuous search, tracking and measurement of the target, it is usually required that the radiation mechanism of the antenna can realize 360° continuous rotation, and at the same time, it is necessary to ensure the uninterrupted transmission of electromagnetic signals during the rotation process. Therefore, a rotary joint must be used in the antenna feed system. In order to ensure that the microwave signal can be continuously and effectively transmitted during the rotation of the antenna. [0003] Currently, rotary joints include waveguide rotary joints and coaxial rotary joints. The...

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Problems solved by technology

[0007]Contact rotary joints have problems of wear and unstable rotation, while direct non-contact structures will cause electromagnetic leakage, which will seriously affect the standing wave and insertion loss of rotary joints Performance, although the non-contact structure using the choke groove structure avoids contact, but the choke groove relies on a quarter-wavelength conversion structure, which is a narrow-band structure and cannot achieve broadband performance

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