High-Frequency Member Assembly Waveguide Choke Groove Leakage
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Solution Overview
Problem
Conventional high-frequency devices face challenges in forming a reliable choke structure around waveguides in attaching areas between high-frequency members, leading to electromagnetic wave leakage and reduced transmission efficiency due to the difficulty in forming choke grooves that surround the waveguide in all directions.
Innovation Solution
A high-frequency member assembly is designed with first and second high-frequency members having waveguide holes and choke grooves that extend in the thickness direction, with the choke grooves positioned to substantially surround the waveguide in the attaching area, acting as an electric short point to prevent wave leakage, and allowing for easier formation and greater freedom in layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single choke groove is formed to surround the waveguide portion through the member wall, then electromagnetic wave leakage is prevented, but the formation process becomes troublesome and requires supporting members
Solution Approach 1:
The single continuous choke groove is segmented into multiple separate choke grooves (first choke groove and second choke groove) that are formed in different members. The first choke groove is formed in the first member and the second choke groove is formed in the second member, eliminating the need for supporting members during formation while collectively achieving the same electromagnetic shielding effect.
Solution Approach 2:
The choke grooves are positioned to overlap when viewed in the thickness direction, with the first choke groove and second choke groove nested relative to each other. This nesting arrangement allows the segmented grooves to collectively surround the waveguide portion effectively while simplifying the formation process in each individual member.
2Reliability
If a choke groove surrounds the waveguide portion in all directions, then wave leakage is reliably prevented, but portion of the member remains between groove ends reducing transmission efficiency
Solution Approach 1:
The continuous choke groove is divided into multiple segments (first and second choke grooves) formed in different members. By positioning these segments to overlap when viewed in the thickness direction, the invention eliminates the gap problem while maintaining reliable wave leakage prevention through the collective action of multiple groove segments.
Solution Approach 2:
The solution transitions from a two-dimensional planar choke groove to a three-dimensional overlapping arrangement of multiple grooves in different members. By utilizing the thickness direction for overlapping positioning, the invention achieves complete waveguide surrounding without leaving portions of the member between groove ends, thus preventing both leakage and energy loss.
3Ease of manufacture
If choke grooves are formed in plate-shaped members with punched holes, then choke structure is created, but supporting members are required until dielectric substrate coverage
Solution Approach 1:
The choke structure is segmented into multiple grooves formed in different members rather than a single groove requiring support. The first choke groove in the first member and the second choke groove in the second member can be formed independently through punching or other methods without requiring supporting members, as each groove is self-supported by its respective member structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The assembly effectively prevents electromagnetic wave leakage from the attaching area, maintaining high transmission efficiency and allowing for simpler and more reliable formation of choke grooves, enhancing waveguide isolation and transmission efficiency.
Implementation Method 1
the choke grooves positioned to substantially surround the waveguide in the attaching area, acting as an electric short point to prevent wave leakage
Data Source
AI summary
A high-frequency member assembly has two high-frequency members of which surfaces are attached to each other. Each member has a rectangular waveguide hole penetrating through the member and two choke grooves opened on the attaching surface. The waveguide holes communicate with each other to form a rectangular waveguide. An electromagnetic wave is transmitted through the waveguide. Each choke groove extends straight along a side of an end of the waveguide hole opened on the attaching surface to be away from the end of the waveguide hole by one quarter of the wavelength of the wave. The depth of each choke groove is equal to one quarter of the wavelength. The choke grooves of one member communicate with the choke grooves of the other member to substantially surround the waveguide with the choke grooves in an attaching area between the member.