Dielectric Waveguide Cross-Section Layout for Low-Reflection Support
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Solution Overview
Problem
Dielectric waveguides used for transmitting high-frequency waves often experience signal attenuation and spurious reflections due to the presence of support devices, which can lead to interference and reduced measurement reliability.
Innovation Solution
A dielectric waveguide design featuring a first section with a uniform cross-section for low signal attenuation and a second section with a larger cross-section for reduced interference, allowing for the arrangement of fastening elements, produced using efficient methods like injection molding, with a transition between sections that can be stepped, oblique, or rounded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support devices are arranged on the waveguide, then the waveguide can be mechanically supported, but spurious reflections and signal interference occur
Solution Approach 1:
The waveguide is divided into multiple sections with different cross-sectional areas. Support devices are specifically arranged on sections with larger cross-sectional areas, separating the mechanical support function from the signal transmission function. This segmentation allows the waveguide to be mechanically supported without the support devices interfering with the signal in the main transmission path.
Solution Approach 2:
Different sections of the waveguide are designed with different local properties: sections with smaller cross-sectional areas are optimized for low signal attenuation, while sections with larger cross-sectional areas are designed to accommodate support devices with reduced interference. This local differentiation allows each section to optimize its specific function.
2Loss of energy
If the waveguide has a uniform cross section, then signal attenuation is minimized, but support devices cannot be arranged without causing interference
Solution Approach 1:
The waveguide structure is segmented into alternating sections of different cross-sectional areas. The smaller sections maintain low signal attenuation characteristics, while the larger sections provide space for support devices. This segmentation allows the waveguide to simultaneously achieve low signal loss and accommodate necessary mechanical support structures.
Solution Approach 2:
The waveguide exhibits local quality variations along its length, with different sections optimized for different functions. Small cross-sectional sections minimize signal attenuation, while large cross-sectional sections reduce the harmful effects of support devices. This local differentiation resolves the contradiction between energy loss and interference.
3Object-affected harmful factors
If the cross-sectional area is increased to reduce interference, then support devices can be arranged, but signal attenuation increases
Solution Approach 1:
Rather than uniformly increasing the cross-sectional area, the waveguide uses segmented sections with alternating sizes. The larger sections are localized and spaced apart, providing interference reduction where needed while the smaller sections maintain low attenuation over the majority of the transmission path. This segmented approach balances both requirements.
Solution Approach 2:
The waveguide applies local quality enhancement by increasing cross-sectional area only in specific sections where support devices are located, while maintaining smaller cross-sectional areas in sections dedicated to signal transmission. This localized modification reduces interference sensitivity without significantly increasing overall signal attenuation.
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 achieves a compromise between low signal attenuation and reduced sensitivity to interference, minimizing reflections and improving the ringing behavior of radar systems, especially in close-range measurements.
Implementation Method 1
a dielectric waveguide for propagating high frequency waves
Implementation Method 2
the dielectric waveguide has a DK value (relative permittivity εr) between 2 and 5
Data Source
Figure 1~2c
Figure 2d~2e
Figure 3a~3c
AI summary
The invention relates to a waveguide, in particular a dielectric waveguide (20), for propagating high-frequency waves, and a dielectric waveguide assembly (28). The dielectric waveguide (20) has a first section (21) with a substantially uniform cross-section, and a second section (22) having a larger cross-section than the first section (21). The dielectric waveguide assembly (28) comprises a waveguide (20) and a support (25) which at least partially encompasses the dielectric waveguide (20).