Quantum Transmission Line Segmentation for Signal Isolation
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Solution Overview
Problem
Existing transmission lines in processing devices, such as quantum computers, suffer from issues related to signal reflection, noise interference, and isolation, which affect the efficiency and performance of signal transmission.
Innovation Solution
A transmission line design comprising conductive lines and layers with specific geometric configurations, including conductive members and insulating layers, to enhance signal isolation and reduce reflection, allowing for efficient and low-noise signal propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional transmission line structures are used, then device complexity is reduced, but signal reflection and noise interference increase
Solution Approach 1:
The transmission line is divided into multiple segments including a first transmission line portion, a second transmission line portion, and an intermediate portion. Each segment serves a specific function in managing signal transmission and isolation, thereby reducing overall signal reflection and noise interference through structured segmentation.
Solution Approach 2:
Different portions of the transmission line are designed with distinct characteristics. The intermediate portion has different dimensional ratios (width-to-length) compared to the first and second transmission line portions, creating localized optimizations for signal isolation and reflection reduction at critical interfaces.
2Area of stationary object
If transmission lines are coupled closely to improve integration, then device area is reduced, but isolation between lines deteriorates
Solution Approach 1:
The transmission line structure utilizes multi-dimensional spatial arrangement with conductive layers stacked at different heights (first conductive layer, second conductive layer, third conductive layer). This vertical dimensionality allows close integration while maintaining isolation through layered separation, reducing noise interference without increasing footprint area.
Solution Approach 2:
The intermediate portion acts as a mediator between the first and second transmission line portions. Its specific geometric configuration and positioning create an isolation barrier that reduces coupling between adjacent transmission lines, thereby minimizing noise interference while allowing compact integration.
3Reliability
If simple transmission line geometry is used, then manufacturing precision requirements are reduced, but signal transmission characteristics deteriorate
Solution Approach 1:
The invention optimizes specific geometric parameters such as the width-to-length ratio of the intermediate portion and the spacing between conductive layers. By carefully controlling these parameters, the design achieves superior signal transmission characteristics with reduced reflection and improved isolation, while the parameters remain within manufacturable tolerances.
Data Source
AI summary
According to one embodiment, a transmission line includes first and second conductive lines, first and second conductive layers and a first conductive member. At least a part of the first conductive line extends in a first direction. The second conductive line is electrically connected to the first conductive line. At least a part of the second conductive line extends along the first direction. The second conductive layer is electrically connected to the first conductive layer. The second conductive layer includes a first partial region, a second partial region, and a third partial region. A direction from the first partial region to the third partial region and a direction from the second partial region to the third partial region are along the first direction. The second conductive line is between the first conductive layer and the third partial region in a second direction crossing the first direction.