Transition waveguide and cold test assembly used for lower-hybrid wave antenna of Tokamak device

Abstract

The invention discloses a transition waveguide used for realizing connection between a standard waveguide and a non-standard waveguide without a flange. The transition waveguide adopts a step structure. A first step can be inserted into the non-standard waveguide and makes tight contact with an inner surface of the non-standard waveguide. A cross section size of a second step is the same with a cross section size of the non-standard waveguide. A size of a last step is the same with a size of the standard waveguide and the last step is equipped with a standard flange plate. The invention also discloses a cold test assembly which comprises the transition waveguide and is used for a lower-hybrid wave antenna of a Tokamak device. The transition waveguide of the invention adopts a structure which is symmetrical to a structure of the non-standard waveguide, a microwave transmitted from the non-standard waveguide is restored in the second step and a tool introduction error of a whole test assembly including the transition waveguide can be effectively reduced. Simultaneously, design time and difficulties of the transition waveguide adopting the structure in the invention and the antenna cold test assembly are greatly shortened and reduced.

Description

technical field [0001] The present invention relates to the technical field of microwave transmission and low clutter antenna testing of Tokamak devices, in particular to a transitional waveguide used to realize the connection between standard waveguides and non-standard waveguides without flanges, and the present invention also relates to the above-mentioned transition waveguide Cold test assembly of waveguide low clutter antennas for tokamak installations. Background technique [0002] Tokamak devices use the induction of ohmic coils to maintain the plasma current and perform ohmic heating of the plasma. Low clutter heating and current driving are important means of heating and current driving in the experimental research of tokamak devices, and the transmitting antenna is an important part of it. [0003] At present, the research on low-clutter system transmitting antennas in the world mainly focuses on the third-generation low-clutter antenna based on the concept of PAM...

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Problems solved by technology

[0005] The technical problem solved by the present invention is that in the prior art, due to the many variables involved in the stepped transition waveguide, the design process of the measurement tool is time-consuming and laborious, and it is difficult to effectively reduce the error introduced by the tool, and then provide a method that can effectively reduce the introduction of the tool. The transitional waveguide with greatly reduced error and design time and difficulty, the present invention also provides a cold test assembly for a low clutter antenna of a tokamak device comprising the transitional waveguide

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