Composite Transmission Line Shielding Signal Power Interference
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Solution Overview
Problem
Conventional transmission lines that transmit high-frequency signals face challenges in preventing size increase and reducing interference between signal and power transmission lines, especially in compact electronic devices.
Innovation Solution
A composite transmission line is designed with multiple signal transmission lines, a power transmission line, and a laminated insulator, where the power transmission line is integrated alongside the signal lines with interlayer connection conductors, reducing conductor loss and interference by optimizing the placement and shielding of conductors within the insulator layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power transmission line is added to an existing signal transmission line, then power transmission capability is improved, but the size (thickness and width) of the transmission line increases
Solution Approach 1:
The patent combines signal transmission lines and power transmission lines into a single integrated transmission line structure. The signal lines and power line are arranged in parallel within the same transmission line body, sharing common insulating and protective layers, which reduces the overall size compared to separate cables.
Solution Approach 2:
The transmission line employs a nested structure where signal transmission lines are positioned within insulating layers that also contain power transmission lines. The conductors are arranged in a compact configuration with ground conductors and insulating layers nested around them, maximizing space utilization.
2Volume of moving object
If signal lines are arranged closely to reduce size, then transmission line size is reduced, but interference between lines increases
Solution Approach 1:
The patent introduces ground conductors and insulating layers as intermediary elements between signal transmission lines and power transmission lines. These intermediaries act as shields and barriers that reduce electromagnetic interference while maintaining compact spacing between conductors.
Solution Approach 2:
The transmission line employs different insulating materials with specific dielectric properties in different regions. High-dielectric constant materials are used in specific areas to enhance shielding effectiveness, while low-loss materials are used in signal transmission regions to minimize interference and maintain signal integrity.
Data Source
AI summary
A composite transmission line includes a laminated insulator including insulator layers, signal transmission lines including first and second signal transmission lines and a power transmission line. The power transmission line includes a power transmission conductor pattern along the insulator layers, and an interlayer connection conductor that interlayer-connects power transmission conductor patterns. The first signal conductor pattern of the first signal transmission line, the second signal conductor pattern of the second signal transmission line, and the power transmission conductor pattern are parallel or substantially parallel to each other on the insulator layers that are mutually different from each other. The first and second signal conductor patterns interpose a first ground conductor in the laminating direction of the insulator layers. The power transmission line is in a side portion of the first signal conductor pattern.