ISRR Signal Transmission Line for Reflectionless Absorption
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Solution Overview
Problem
Existing methods for achieving unidirectional reflectionless absorption characteristics require complex structural designs, leading to poor usability and limited frequency range, especially in high-frequency applications.
Innovation Solution
A signal transmission control device utilizing a conductive layer and dielectric layer with inverted split ring resonators (ISRRs) spaced apart and oriented differently, allowing for indirect interaction through traveling wave phase interference, enabling adjustable transmittivity, reflectivity, and absorptivity, and achieving unidirectional reflectionless absorption with a simple structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex structural design is used to achieve unidirectional reflectionless absorption characteristics, then signal control performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The device is segmented into two distinct ISRR structures with different orientations (first ISRR with gap along first direction, second ISRR with gap along second direction perpendicular to first direction). Each ISRR independently contributes to the overall signal control function, allowing the complex performance to be achieved through simpler individual components working together
Solution Approach 2:
The patent employs asymmetric orientation of the two ISRR structures - the first ISRR has its gap oriented along a first direction while the second ISRR has its gap oriented along a second direction perpendicular to the first direction. This asymmetric configuration enables unidirectional reflectionless absorption characteristics without requiring complex symmetric structures
2Reliability
If existing methods are used to achieve unidirectional reflectionless absorption, then signal control characteristics are improved, but frequency range is limited especially in high-frequency applications
Solution Approach 1:
The patent changes the structural parameters of the ISRRs by orienting their gaps in different directions (first direction vs. second perpendicular direction). This parameter variation allows the device to achieve unidirectional reflectionless absorption characteristics while maintaining functionality across a broader frequency range including high-frequency applications
3Reliability
If complex structural design is implemented, then signal control performance is improved, but ease of manufacture deteriorates
Solution Approach 1:
The device is divided into two separate ISRR structures that can be independently fabricated and then assembled. Each ISRR is a relatively simple resonant structure, and their combination achieves the desired performance without requiring complex monolithic fabrication processes
Solution Approach 2:
The asymmetric orientation of ISRR gaps (perpendicular directions) provides a clear fabrication guideline that simplifies manufacturing alignment and quality control, making the device easier to manufacture while maintaining excellent signal control performance
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
The device achieves excellent signal control characteristics with a simple structure, small size, and expanded frequency range up to several terahertz, facilitating easy manufacturing and high usability.
Implementation Method 1
indirect interaction through traveling wave phase interference
Implementation Method 2
inverted split ring resonators (ISRRs)
Data Source
AI summary
A signal transmission control device may include a device layer including a conductive layer and a dielectric layer disposed on the conductive layer, and a conductive line disposed on the dielectric layer and extending across a first inverted split ring resonator (ISRR) and a second inverted split ring resonator (ISRR). The device layer may define the first ISRR and the second ISRR spaced apart from each other, and a signal transmission characteristic between a first end and a second end of the conductive line may be controlled by the first ISRR and the second ISRR.