Capacitive coaxial radio frequency rotary joint

Abstract

The invention discloses a capacitive coaxial radio frequency rotary joint, and aims to solve the problems that an existing capacitive dual-channel rotary joint is short in service life, poor in delay transmission performance stability and difficult to assemble. According to the technical scheme, inner and outer transmission channels of an inner channel and an outer channel of a rotor assembly are isolated through dielectric structural members, and an inner channel of a stator assembly is isolated through a dielectric sleeve wrapping a cylindrical coupling conductor mandrel and a dielectric limiting block at the bottom of a hollow blind hole of the cylindrical coupling conductor mandrel. According to the outer channel, a barrel slip ring medium sleeve wrapping a stator assembly and a medium sleeve of an outer-layer isolating ring are adopted for isolating a transmission joint of a rotor assembly, and the rotor assembly and the stator assembly are directly compounded and coaxially assembled to form the capacitive rotary joint for double-channel signal transmission. The hollow radio frequency core shaft of the inner channel of the rotor can react on the coupling conductor of the thin-wall structure along with the outer-layer isolating ring, the roundness of the coupling conductor is self-adaptively repaired, and the rotor assembly and the stator assembly transmit double-channel signals through leading-out wires.

Description

technical field [0001] The invention relates to the technical field of microwave communication, and relates to a realization technology of a rotating joint of a high-frequency on-the-fly mobile radar antenna mainly used in satellites, radars, mobile antennas, on-the-move communications and other equipment. Background technique [0002] With the continuous progress of modern science and technology, radar technology has higher and higher requirements on the transmission frequency of fixed parts and received signals, and often requires transmission frequencies in the range of tens of megahertz or hundreds of megahertz to achieve medium and high frequency signal transmission. In the field of microwave communication technology, rotary joint is a very important communication device, which is mainly used in various radar equipment, including air control of aircraft, air defense, mobile communication, and satellite signal transmission. A revolute joint differs from a conventional ad...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the deficiencies of the existing technology, to provide a high-precision capacitive rotary joint with stable transmission performance, which can meet the requirements of harsh mechanical environments and climatic environments, so as to solve the problem of existing capacitive dual-channel rotary joints. Problems of short joint life, poor stability of delay transmission performance and difficult assembly, defects of poor assembly concentricity of inner and outer conductors of capacitive rotary joints

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