Shielding Electrodes Stabilize Resonator Coupling
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Solution Overview
Problem
Existing signal transmission devices using substrates with resonators suffer from significant variations in coupling coefficient and resonance frequency due to variations in the thickness of the air layer between substrates, leading to unstable filter performance.
Innovation Solution
The implementation of a signal transmission device with shielding electrodes covering the open ends of resonators on opposing substrates, optimizing the electromagnetic coupling to primarily involve magnetic field components, thereby reducing electric field distribution and stabilizing resonance frequencies across varying inter-substrate distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resonators on different substrates are electromagnetically coupled to enable signal transmission, then signal transmission capability is improved, but variation in inter-substrate distance causes large changes in coupling coefficient and resonance frequency
Solution Approach 1:
A shielding electrode is introduced as an intermediary element between the resonators on different substrates. This shielding electrode acts as a mediator that guides and stabilizes the electromagnetic coupling, reducing the sensitivity to inter-substrate distance variations while maintaining the signal transmission capability between resonators.
Solution Approach 2:
The invention changes the electromagnetic field distribution parameters by introducing the shielding electrode, which modifies the coupling mechanism. This parameter change transforms the coupling from being highly sensitive to distance into a more stable interaction, thereby reducing the variation in coupling coefficient and resonance frequency caused by manufacturing tolerances.
2Adaptability or versatility
If resonators are electromagnetically coupled between substrates, then filter functionality is achieved, but pass frequency and pass band vary significantly with inter-substrate distance
Solution Approach 1:
The shielding electrode serves as an intermediary that stabilizes the electromagnetic interaction between resonators, enabling consistent filter functionality while reducing the sensitivity of pass frequency and pass band to inter-substrate distance variations.
Solution Approach 2:
By introducing the shielding electrode, the electromagnetic field distribution parameters are modified, which stabilizes the resonance characteristics and thereby maintains consistent pass frequency and pass band despite variations in substrate spacing.
3Stability of the object's composition
If shielding electrodes are added to cover resonator open ends, then electric field distribution is reduced and resonance frequency stability is improved, but device complexity increases
Solution Approach 1:
The shielding electrode is applied locally at the open ends of resonators where the electric field concentration occurs. This localized approach effectively reduces the electric field distribution and stabilizes resonance frequency without requiring comprehensive shielding throughout the entire device, thereby minimizing the increase in device complexity.
Solution Approach 2:
The shielding electrode acts as a localized intermediary element that specifically addresses the electric field issue at critical points (open ends of resonators), providing an effective solution with minimal additional structural complexity.
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 configuration effectively suppresses variations in pass frequency and pass band caused by changes in inter-substrate distance, ensuring stable signal transmission and filter performance.
Implementation Method 1
a first resonator and a second resonator which are electromagnetically coupled to each other
Implementation Method 2
optimizing the electromagnetic coupling to primarily involve magnetic field components
Implementation Method 3
reducing electric field distribution and stabilizing resonance frequencies
Implementation Method 4
stabilizing resonance frequencies across varying inter-substrate distances
Data Source
AI summary
A signal transmission device includes: a first substrate and a second substrate; a first resonance section including a first resonator and a second resonator electromagnetically coupled to each other; a second resonance section disposed side-by-side relative to the first resonance section, and electromagnetically coupled to the first resonance section to perform a signal transmission between the first and second resonance sections; and a first shielding electrode disposed between the first resonator and the second substrate and partially covering the first resonator to allow at least an open end of the first resonator to be covered therewith, and a second shielding electrode disposed between the second resonator and the first substrate and partially covering the second resonator to allow at least an open end of the second resonator to be covered therewith.