Reflective Groove Waveguide for Stable High-Frequency Miniaturization
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Solution Overview
Problem
Conventional waveguides face challenges in miniaturization while maintaining favorable frequency characteristics, especially when the frequency of the signal increases, requiring reduced diameters that are sensitive to positional displacement of metal members.
Innovation Solution
The waveguide design incorporates a first conductor plate with a groove portion and a first vertical tube portion, and a second conductor plate with a reflective portion that reflects radio waves into the first vertical tube portion, allowing for miniaturization while maintaining effective frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the frequency of the signal transmitted by the waveguide is increased, then the waveguide can transmit higher frequency signals, but the diameters of the waveguide and metal member must be reduced, which increases the influence of positional displacement on frequency characteristics
Solution Approach 1:
The waveguide is divided into multiple sections with different cross-sectional dimensions along its length. By segmenting the waveguide into sections with varying dimensions, the design achieves miniaturization at specific frequencies while maintaining tolerance to positional displacements through the gradual transition of dimensions along the propagation path.
Solution Approach 2:
The waveguide employs dynamic dimensional variation along its length, where the cross-sectional dimensions change progressively rather than remaining constant. This dynamic structure allows the waveguide to adapt to different frequency requirements while reducing sensitivity to manufacturing tolerances and positional displacements through the gradual transition.
2Volume of moving object
If the diameters of the waveguide and metal member are reduced for miniaturization, then the waveguide size is decreased, but the influence of positional displacement of the metal member on the frequency characteristic is increased
Solution Approach 1:
The waveguide is divided into multiple sections with different cross-sectional dimensions along its length. By segmenting the waveguide into sections with varying dimensions, the design achieves miniaturization at specific frequencies while maintaining tolerance to positional displacements through the gradual transition of dimensions along the propagation path.
Solution Approach 2:
The waveguide utilizes changes in cross-sectional dimension parameters along its length to achieve frequency-selective miniaturization. By varying the dimensional parameters progressively, the waveguide maintains frequency characteristics stability while achieving reduced overall size, as the parameter changes compensate for positional displacement effects.
3Ease of manufacture
If conventional waveguide design is used, then the structure is simple and easy to manufacture, but miniaturization cannot be achieved while maintaining favorable frequency characteristics
Solution Approach 1:
The waveguide is divided into multiple sections with different cross-sectional dimensions along its length. By segmenting the waveguide into sections with varying dimensions, the design achieves miniaturization at specific frequencies while maintaining tolerance to positional displacements through the gradual transition of dimensions along the propagation path.
Solution Approach 2:
The waveguide utilizes changes in cross-sectional dimension parameters along its length to achieve frequency-selective miniaturization. By varying the dimensional parameters progressively, the waveguide maintains frequency characteristics stability while achieving reduced overall size, as the parameter changes compensate for positional displacement effects.
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
This design enables the miniaturization of waveguides while maintaining favorable frequency characteristics, reducing the impact of positional displacement on frequency performance.
Implementation Method 1
a reflective portion that is inserted into the groove portion and protrudes from a second main surface, which is a flat surface of the second conductor plate in contact with the first main surface, and has a reflective surface which reflects a radio wave, propagated along the groove portion, toward the first vertical tube portion
Data Source
AI summary
The first conductor plate has a groove portion that has a rectangular cross section and is formed in parallel with a first main surface such that the longitudinal direction becomes a first direction, and a first vertical tube portion formed in a direction away from the second conductor plate in a second direction orthogonal to the first direction and the first main surface, with a branch position in the groove as a starting point. The second conductor plate includes a reflection portion that is inserted into the groove portion in a manner protruding from a second main surface, which is a flat surface of the second conductor plate in contact with the first main surface, and has a reflection surface that reflects the radio wave, propagated along the groove portion, toward the first vertical tube portion.