Coplanar Waveguide Bend Zone for Reliable High-Frequency Transmission
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Solution Overview
Problem
High-frequency transmission lines face difficulties in determining the optimal bending position, leading to potential bending stress on internal structures when bent, which can damage interlayer connection conductors and affect signal transmission.
Innovation Solution
A transmission line member design with distinct thickness portions, where a thinner middle portion is easily bendable and lacks interlayer connection conductors, allowing for easy determination of the bending position and reduction of bending stress impact on internal structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the base material has a uniform thickness, then the manufacturing process is simple, but it is difficult to determine the bending position and bending stress is applied to interlayer connection conductors
Solution Approach 1:
The base material is divided into a first base material portion and a second base material portion with different thicknesses. The thinner second portion creates a designated bending zone that is easily identifiable and bendable, while the thicker first portion maintains structural integrity and protects interlayer connection conductors from bending stress.
Solution Approach 2:
Different portions of the base material are given different thickness properties to serve different functions. The first portion has greater thickness for structural support and conductor protection, while the second portion has reduced thickness for easy bending, allowing each region to optimize its local function.
2Device complexity
If the base material has uniform thickness, then the structure is simple, but bending stress damages interlayer connection conductors
Solution Approach 1:
The base material structure is segmented into distinct thickness zones: a first base material portion with greater thickness that provides structural support and protects conductors, and a second base material portion with reduced thickness that serves as a dedicated bending zone, thereby isolating bending stress from sensitive conductive elements.
Solution Approach 2:
The second base material portion with reduced thickness acts as an intermediary bending zone that absorbs and isolates bending stress, preventing it from being transmitted to the interlayer connection conductors in the thicker first portion.
3Strength
If the base material is made thicker for strength, then interlayer connection conductors are better protected, but bending becomes difficult and positioning is uncertain
Solution Approach 1:
The base material is segmented into a first portion with greater thickness for strength and conductor protection, and a second portion with reduced thickness for easy bending and precise positioning, allowing both strength and bendability requirements to be satisfied in different regions.
Solution Approach 2:
Different thickness qualities are assigned to different portions of the base material: the first portion has increased thickness locally to provide strength and protect conductors, while the second portion has reduced thickness locally to enable easy bending and accurate positioning.
Data Source
AI summary
A transmission line member includes a base body extending along a transmission direction of a high-frequency signal, and a first transmission line, a second transmission line, and a third transmission line. The base body includes a first portion including the first transmission line, a second portion including the second transmission line, and a third portion including the third transmission line. The second portion is connected between the first and third portions. A thickness of the second portion is smaller than a thickness of the first and third portions. The second transmission line includes only a conductor pattern extending more in the transmission direction than in a direction of the thickness.