Compact flangeless waveguide connection structure and design method

Abstract

The invention discloses a compact flangeless waveguide connection structure. A positive connection portion comprises a first standard waveguide, a first impedance conversion section, a first non-standard waveguide section and a periodic metal convex body array. The first impedance conversion section is located between the first standard waveguide section and the first non-standard waveguide section, the periodic metal convex body array is arranged on a periphery of an outer wall of the first non-standard waveguide section, and a plurality of metal convex bodies are respectively and uniformly arranged according to a periodic layout rule. A negative connection portion comprises a second standard waveguide, a second impedance conversion section and an expanded cavity structure. The second impedance conversion section is located between the second standard waveguide and the expanded cavity structure, and the expanded cavity structure is arranged at a tail end of the second impedance conversion section. One end, with the periodic metal convex body array, of the positive connection portion is inserted into the expanded cavity structure of the negative connecting portion to form a whole compact flangeless waveguide connecting structure. A size is greatly reduced, a miniaturization design and flexible layout are better facilitated, and more convenient and flexible assembling can be achieved through a plug-pull design.

Description

technical field [0001] The invention relates to a compact flangeless waveguide connection structure and design method, which can be used in various microwave components and system connection structures, and belongs to the field of microwave technology. Background technique [0002] Waveguide is an important transmission line for transmitting microwave signals, and the most commonly used one is a rectangular waveguide, including a rectangular metal tube and a flange. Vertical, centered, waveguides with different rectangular cross-sections and flanges with different sizes for different frequency bands. Due to the advantages of low insertion loss and high power capacity, waveguide transmission lines are widely used in satellite payload systems. Due to the limitation of the space of the satellite payload platform and the carrying capacity of the vehicle, volume and weight have become important considerations in payload design. A large number of connection structures are requir...

AI Technical Summary

Problems solved by technology

If the consistency of the welding process is difficult to ensure, the electromagnetic transmission performance of the welded flangeless waveguide connection is difficult to predict and guarantee

On the other hand, welding is an irreversible process. Once the welding is completed, the structure and position of the waveguide cannot be changed, which is not conducive to the flexible disassembly and assembly of various components and components in the system, and is not conducive to the overall design and flexible layout of the system. low mechanical stability

If the waveguide direct plug-in design is adopted, due to the existence of machining errors and roughness, ideal electrical contact cannot be formed in practice, and there will be air gaps between the plug-in contact surfaces, causing electromagnetic leakage and affecting electromagnetic transmission performance

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