Josephson Resonator Oscillator Layout for Compact Stable Coupling
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Solution Overview
Problem
Existing electronic circuits incorporating Josephson junctions face challenges in downsizing while maintaining functionality.
Innovation Solution
The electronic circuit design includes a first resonator and a second resonator electromagnetically coupled via a magnetic field, utilizing superconducting materials and Josephson junctions to reduce size and enhance electromagnetic coupling, allowing for a compact oscillator configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional electronic circuit design is used, then functionality is maintained, but device size cannot be reduced
Solution Approach 1:
The patent merges the resonator and oscillator functions into a single integrated structure where the resonator serves as both the frequency-determining element and the oscillating element. This consolidation eliminates separate components, reducing overall circuit volume while maintaining oscillation functionality through the Josephson junction's nonlinear characteristics.
Solution Approach 2:
The patent transitions from planar circuit layout to a three-dimensional stacked configuration with multiple conductive layers (first conductive layer, second conductive layer, third conductive layer) separated by insulating layers. This vertical stacking reduces the footprint area while preserving electrical connectivity and functional performance.
2Volume of moving object
If circuit components are reduced for downsizing, then device volume decreases, but electromagnetic coupling efficiency deteriorates
Solution Approach 1:
The patent enhances electromagnetic coupling in the specific region where the first and second resonators interact by positioning them in close proximity within the same conductive layer. The local electromagnetic field intensity is maximized in this coupling region, ensuring efficient energy transfer despite the overall compact size of the oscillator.
3Area of stationary object
If compact configuration is implemented, then device area is reduced, but unwanted oscillation modes increase
Solution Approach 1:
The patent utilizes the dynamic nonlinear characteristics of the Josephson junction to control oscillation modes. By adjusting the bias current and operating point of the Josephson junction, the system dynamically selects and stabilizes the fundamental oscillation mode while suppressing higher-order modes, even in the compact integrated structure.
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 enables downsizing of the electronic circuit and oscillator, reducing loss and enabling stable oscillation frequencies, while maintaining efficient electromagnetic coupling and reducing unnecessary modes.
Implementation Method 1
a first current path including a first Josephson junction, and a second current path including a second Josephson junction
Implementation Method 2
a second resonator configured to be electromagnetically coupled with the first resonator
Data Source
AI summary
According to one embodiment, an electronic circuit includes an element part. The element part includes a first resonator and a second resonator. The first resonator includes a first conductive layer, a second conductive layer, a first current path including a first Josephson junction, and a second current path including a second Josephson junction. The first current path includes a first end portion and a second end portion. The first end portion is connected with the first conductive layer. The second end portion is connected with the second conductive layer. The second current path includes a third end portion and a fourth end portion. The third end portion is connected with the first conductive layer. The fourth end portion is connected with the second conductive layer. The second resonator is configured to be electromagnetically coupled with the first resonator.