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A broadband non-contact circular waveguide rotary joint and its design method

A rotary joint, non-contact technology, applied in the microwave field, can solve the problems of wear and rotation of circular waveguide rotary joints, unable to meet the requirements of frequency changes, narrow working bandwidth, etc., to achieve wide working bandwidth, good standing wave and insertion loss performance, stable the effect of rotation

Active Publication Date: 2022-03-04
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, most of the existing circular waveguide rotary joints currently use a choke groove structure, which has a narrow operating bandwidth and cannot meet the flexible frequency change requirements within a broadband range. The circular waveguide rotary joints realized by the contact structure have wear and tear unstable problem

Method used

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  • A broadband non-contact circular waveguide rotary joint and its design method
  • A broadband non-contact circular waveguide rotary joint and its design method
  • A broadband non-contact circular waveguide rotary joint and its design method

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0062] One of the core ideas of the present invention is to propose a broadband non-contact circular waveguide rotary joint, in which a number of arc-shaped metal convex bodies with equal radius are regularly arranged on the outer wall of the first circular waveguide to form a metal convex body array structure , set the corresponding shielding cavity structure at the end of the second circular waveguide, and under the premise of ensuring that the central axes of the two waveguides coincide, insert the metal convex body array part of the first circular waveguide into the shielding cavity of the second circular waveguide, and the metal convex body array The surface is not in contact with the inner wall of the shielding cavity, and a rotat...

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Abstract

The invention discloses a broadband non-contact circular waveguide rotary joint and a design method thereof. The broadband non-contact circular waveguide rotary joint comprises: a first circular waveguide, a cylindrical metal convex body array, a bearing, a second circular waveguide, and a shielding cavity and a bearing fixing cavity; the end of the first circular waveguide is provided with a metal convex body array; the end of the second circular waveguide is provided with a shielding cavity and a bearing fixing cavity in turn; the end of the first circular waveguide is inserted into the shielding cavity, and the first circular waveguide and the second The waveguide port surface of the circular waveguide is not in contact; the metal convex body array and the shielding cavity together form a non-contact electromagnetic bandgap structure to realize broadband electromagnetic shielding, and cooperate with the bearing to form a broadband non-contact circular waveguide rotary joint. The invention guarantees the broadband characteristics of the rotary joint by constructing a rotatable broadband non-contact electromagnetic bandgap structure at the rotating part, and the non-contact structure avoids wear and tear, making the rotation more stable and the life longer, and can be widely used in various communications , Radar and antenna feed systems.

Description

technical field [0001] The invention belongs to the field of microwave technology, and in particular relates to a broadband non-contact circular waveguide rotary joint and a design method. Background technique [0002] 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 feeding system to realize the connection between the fixed part and the rotating part, so as to ensure that the microwave signal can be continuously and effectively transmitted during the rotation of the antenna. [0003] Rotary joints include waveguide rotary joints and coaxial rotary joints. The waveguide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/06H01P11/00
CPCH01P1/066H01P11/00
Inventor 陈翔孙冬全李军李小军崔万照胡天存黄微
Owner XIAN INSTITUE OF SPACE RADIO TECH
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