Dual-channel coaxial rotary joint

Abstract

Disclosed is a dual-channel coaxial rotary joint. By virtue of the dual-channel coaxial rotary joint, reduction of structural dimensions, processing and rotation stability can be facilitated, and microwave transmission of broad frequency bands can be satisfied based on excellent performance index. The dual-channel coaxial rotary joint comprises a rotary end and a fixed end, a flange plate, a first channel fixed end port and a second channel fixed end port, a bearing pedestal, a bearing, a rotary body first channel rotary end port and a second channel rotary end port, a first channel rotary end inner conductor, and a first channel fixed end inner conductor, wherein the first channel rotary end inner conductor and the first channel fixed end inner conductor are in connection through rotatable matching between male needles, namely, between an inward inserting central needle and a petal type female needle, and namely, between petal central needles; the first channel rotary end inner conductor, the first channel fixed end inner conductor and the bearing have the same axial lead; and the second channel rotary end inner conductor and the second channel fixed end inner conductor are in connection through rotatable matching between an elastic sheet and a linkage ring in a hollow structure of the rotary body.

Description

technical field [0001] The invention relates to a microwave device, in particular to a dual-channel coaxial rotary joint, which is beneficial to reduce the structural size and processing, and is beneficial to stable rotation, and satisfies microwave transmission in a wide frequency band with excellent performance indicators. Background technique [0002] At present, coaxial rotary joints are mostly used in radar and rotary antennas, and are often used in L, C, S, X, and Ku bands. The structure is mostly a single channel, or a single channel plus one or more waveguides. The frequency range of the waveguide channel is relatively narrow. , and the structure is complex and the size is large, the microwave transmission in the broadband band is limited, the processing requirements are high, the difficulty is great, and the performance is unstable. L, C, S, X, Ku indicate microwave frequency code, L corresponds to 1-2GHz and wavelength 30-15cm; C corresponds to 4-8GHz and wavelengt...

AI Technical Summary

Problems solved by technology

[0002] At present, coaxial rotary joints are mostly used for radar and rotary antennas, and are often used in L, C, S, X, Ku bands. The structure is mostly single channel, or a single channel plus one or more waveguides. The frequency range of the waveguide channel is relatively narrow. , and the structure is complex and the size is large, the microwave transmission restrictions on the broadband band are high, the processing requirements are high, the difficulty is large, and the performance is unstable

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