Dielectric Waveguide Low-Frequency Reflection via Columnar Conductor
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Solution Overview
Problem
Dielectric waveguides face challenges in achieving good reflection characteristics in the low-frequency band of the E band, particularly when the width of the waveguide is reduced, leading to inferior reflection performance compared to the high-frequency band.
Innovation Solution
The dielectric waveguide design includes a mode conversion section with a columnar conductor positioned near the short wall, where the width of the short wall is greater than the distance between the narrow walls at the location of the columnar conductor, optimizing the reflection characteristics across the entire operation band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width of the waveguide is reduced, then the degree of integration is improved, but the reflection characteristic in the low-frequency band deteriorates
Solution Approach 1:
The patent applies local quality by making the short wall width different from the narrow wall distance only in the specific region where the columnar conductor is located. The short wall width is greater than the distance between narrow walls at the columnar conductor's position, creating a localized structural variation that improves low-frequency reflection characteristics without affecting the overall compactness of the waveguide
Solution Approach 2:
The patent implements preliminary action by pre-positioning the columnar conductor at a specific distance from the short wall before electromagnetic wave propagation occurs. This predetermined configuration of the columnar conductor and the widened short wall section creates optimal boundary conditions that enhance reflection characteristics in the low-frequency band before the wave enters the waveguide region
2Volume of moving object
If the width of the waveguide is reduced, then the device size is decreased, but the electromagnetic wave propagation performance deteriorates
Solution Approach 1:
The patent maintains small overall volume while improving propagation performance by creating a localized structural feature - the widened short wall section - only where needed near the columnar conductor. This localized modification does not increase the overall waveguide volume significantly but effectively enhances electromagnetic wave propagation characteristics
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 configuration enhances the reflection characteristic in the low-frequency band, maintaining good performance even when the waveguide width is reduced, thereby supporting efficient electromagnetic wave propagation and integration of transmission devices and electronic components.
Implementation Method 1
a dielectric waveguide configured such that a waveguide region is filled with a dielectric
Implementation Method 2
a mode conversion section, the first wide wall, the second wide wall, the first narrow wall, the second narrow wall, and the short wall defining a waveguide region
Data Source
AI summary
Provided is a dielectric waveguide having a good reflection characteristic also in a band on a low frequency side of a center frequency of a given operation band. A dielectric waveguide (1) includes: a waveguide region (12) which is defined by a first wide wall (21), a second wide wall (22), a first narrow wall (23), a second narrow wall (24), and a short wall (25) and which is filled with a dielectric; and a mode conversion section (31) which includes a columnar conductor (34) extending from a surface of the waveguide region (12) toward an inside of the waveguide region (12). A width (W2) of the short wall (25) is configured to be greater than a waveguide width (Wi) at a location (x=x1) at which the columnar conductor (34) is provided.