Waveguide Resonator Structure for Dielectric Measurement Above 110 GHz
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Solution Overview
Problem
Existing resonator technologies face challenges in measuring dielectric characteristics at frequencies higher than 110 GHz due to complex structures and potential manufacturing difficulties, particularly in coaxial lines, leading to insufficient strength and accuracy issues.
Innovation Solution
A resonator design incorporating a first and second waveguide with plate shapes and a multilayer body comprising dielectric layers and a circular conductor foil, allowing for dielectric characteristic measurement at high frequencies through a simple structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the inside diameter of the coaxial line is reduced to measure dielectric characteristics at frequencies above 110 GHz, then the measurement frequency range is extended, but the coupling portions become complicated and manufacturing difficulty increases
Solution Approach 1:
The resonator is divided into multiple functional segments: waveguide portions for high-frequency signal transmission, a multilayer body for dielectric measurement, and coupling portions for energy transfer. This segmentation allows each part to be optimized independently, simplifying the overall structure while enabling high-frequency operation
Solution Approach 2:
The coupling portions are designed to integrate the waveguide and multilayer body into a unified structure where the waveguide directly couples to the dielectric layers under test. This merging eliminates the need for complex intermediate coupling structures that would be required in traditional coaxial line designs
2Speed
If the inside diameter of the coaxial line is reduced to measure dielectric characteristics at frequencies above 110 GHz, then the measurement frequency range is extended, but manufacturing precision requirements increase
Solution Approach 1:
The design transitions from a coaxial line geometry to a waveguide geometry with specific dimensional parameters optimized for high-frequency operation. The waveguide dimensions and multilayer body configuration are carefully controlled to achieve the desired frequency response while maintaining manufacturability through standardized fabrication processes
3Measurement precision
If the coupling portion structure is complicated to achieve high-frequency measurement, then the measurement capability is improved, but the strength of the resonator becomes insufficient
Solution Approach 1:
The waveguide portions and multilayer body are designed and positioned in advance to create strong mechanical connections before the resonator is put into operation. This preliminary structural configuration ensures that the resonator maintains sufficient strength to withstand operational stresses while achieving the required measurement precision through proper geometric design
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
Enables accurate measurement of dielectric characteristics at high frequencies with a simplified structure, suppressing high-order modes and minimizing leakage, thereby improving measurement precision.
Implementation Method 1
a first waveguide having a plate shape and provided with a first propagation path; a second waveguide having a plate shape and provided with a second propagation path
Implementation Method 2
The first waveguide has, on the second waveguide side, a first communication hole to connect the first propagation path with a space between the first waveguide and the second waveguide
Implementation Method 3
a multilayer body including a circular conductor foil and two dielectric layers having a plate shape and sandwiching the circular conductor foil
Data Source
AI summary
A resonator includes a first waveguide and a second waveguide having plate shapes and opposed to in a first direction, and a multilayer body provided in a space between them. The multilayer body includes a circular conductor foil sandwiched between two dielectric layers having a plate shape. A connecting portion is provided at one end of the propagation path of the waveguide. A communication hole to connect the propagation path with a space between the first waveguide and the second waveguide is provided on the other waveguide side of the one waveguide. The multilayer body is provided between the first waveguide and the second waveguide. In plan view in the first direction, the communication hole is located inside an inner wall of the propagation path and overlaps the propagation path and a center of the circular conductor foil.