Resin-Coated Waveguide Choke Groove for Leakage Control
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Solution Overview
Problem
Conventional waveguides for high-frequency electromagnetic fields face structural defects, such as collapse, due to variations in the shape of the second waveguide hole and choke groove, leading to electromagnetic field leakage and reduced transmission efficiency.
Innovation Solution
A waveguide configuration featuring a first waveguide with a first waveguide hole and a second waveguide with a second waveguide hole and a choke groove, where the second waveguide includes a resin molded product and a metal coating film, and the choke groove has a constant length between its wall surface and the inner wall surface adjacent to the second waveguide hole, preventing structural defects and enhancing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the second waveguide hole and choke groove have variable shapes, then manufacturing flexibility is improved, but structural stability deteriorates causing collapse and electromagnetic field leakage
Solution Approach 1:
The patent applies parameter changes by specifying that the length between the wall surface of the second waveguide hole and the inner wall surface of the choke groove must be constant along the circumferential direction. This parameter constraint (constant length) resolves the contradiction by maintaining structural stability while allowing the overall shape to vary for manufacturing flexibility.
Solution Approach 2:
The patent applies local quality by requiring constant length specifically in the circumferential direction around the waveguide hole, while allowing variation in other dimensions. This localized constraint ensures structural stability at critical locations without restricting overall manufacturing flexibility.
2Weight of moving object
If resin molded product is used for second waveguide, then weight and cost are reduced, but manufacturing precision deteriorates due to resin flow variations
Solution Approach 1:
The patent applies parameter changes by controlling the length parameter between the waveguide hole wall and choke groove inner wall to be constant. This parameter control compensates for resin flow variations and maintains manufacturing precision while using lightweight resin material.
Solution Approach 2:
The patent applies preliminary action by designing the choke groove and waveguide hole with predetermined constant dimensions before resin molding. This pre-planned dimensional specification guides the molding process to achieve consistent results despite resin flow variations.
3Ease of manufacture
If choke groove length varies circumferentially, then manufacturing ease is improved, but electromagnetic field leakage increases reducing transmission efficiency
Solution Approach 1:
The patent applies parameter changes by maintaining the length between the waveguide hole wall and choke groove inner wall as a constant parameter in the circumferential direction. This constant parameter prevents electromagnetic field leakage while remaining compatible with manufacturing processes.
Data Source
AI summary
A waveguide includes a first waveguide having a first waveguide hole and a second waveguide having a second waveguide hole and assembled to the first waveguide with a predetermined gap therebetween. The second waveguide hole has an opening on one surface of the second waveguide facing the first waveguide, and the opening has a rounded polygonal shape or a circular shape. The second waveguide includes a resin molded product and a metal coating film covering the resin molded product, and the second waveguide has a choke groove around the second waveguide hole. The choke groove has such a shape that a length between a wall surface of the second waveguide hole and an inner wall surface of the choke groove adjacent to the second waveguide hole is constant along a circumferential direction of the second waveguide hole.