Plastic Waveguide Multi-Signal Link for Cryogenic Qubit Transmission
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Solution Overview
Problem
Existing waveguide technologies are not suitable for the simultaneous bidirectional transmission of multiple signals in the frequency range between 1 GHz and 10 THz, particularly in environments incompatible with radio transmissions, such as Quantum machines, where they lead to high energy inefficiency and increased costs due to the use of coaxial cables.
Innovation Solution
A plastic waveguide system that enables broadband bidirectional multi-connectivity by transmitting a plurality of signals, including useful information and sinusoidal reference signals, maintaining synchronization and avoiding interference through heterodyne and direct conversions, allowing for efficient communication in cryogenic environments with reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If coaxial cables are used for signal transmission in Quantum machines, then signal transmission is enabled, but the number of cables increases and thermal losses increase
Solution Approach 1:
The patent combines multiple signal transmission functions into a single plastic waveguide structure. Instead of using multiple coaxial cables for different signals (control, readout, reference), the invention integrates all these functions into one waveguide that can simultaneously transmit multiple frequencies and signal types, thereby reducing the number of physical connections and associated thermal losses.
Solution Approach 2:
The plastic waveguide is designed as a universal transmission medium that can handle multiple signal types and frequency ranges simultaneously. It serves as both a control signal transmission path and a readout signal path, and can also carry reference signals, replacing the need for separate specialized cables for each function.
2Adaptability or versatility
If multiple coaxial cables are used to address Qubits, then signal transmission to multiple Qubits is enabled, but energy efficiency decreases due to thermal conduction
Solution Approach 1:
The invention merges multiple Qubit addressing functions into a single plastic waveguide that can transmit multiple frequency signals simultaneously. Different frequency ranges within the waveguide can be assigned to different Qubits or Qubit groups, enabling multi-Qubit control without requiring separate physical cables for each Qubit, thus maintaining versatility while improving energy efficiency.
Solution Approach 2:
The system uses frequency division multiplexing where different frequency parameters within the plastic waveguide are assigned to different communication channels. This allows multiple Qubits to be addressed through a single physical medium by varying the frequency parameter, eliminating the need for multiple thermal-conductive cables.
3Loss of energy
If plastic waveguide is used for signal transmission, then thermal insulation is improved, but simultaneous bidirectional multi-signal transmission was not previously enabled
Solution Approach 1:
The invention utilizes frequency division multiplexing to enable simultaneous bidirectional multi-signal transmission through the plastic waveguide. By assigning different frequency ranges to different signal types (forward signals, backward signals, reference signals) and using heterodyne conversion techniques, the system achieves full-duplex communication with multiple signals in a single thermally-insulated medium.
Solution Approach 2:
The patent introduces heterodyne conversion as an intermediary mechanism that enables the plastic waveguide to handle multiple signal types. Local oscillators generate reference signals that mix with the transmitted signals through heterodyne conversion, allowing the system to extract multiple independent communication channels from a single physical transmission medium while maintaining thermal insulation.
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 solution allows for the efficient transmission of multiple signals in Quantum machines and IoT applications, reducing the number of connections and energy consumption, enabling the integration of a large number of Qubits while maintaining low thermal losses and energy efficiency.
Implementation Method 1
Waves with frequencies between 1 GHz and 10 THz are non-ionizing radiation that can penetrate a wide range of non-conductive materials such as wood, plastic, ceramics, and paper. The transmission of such waves enables new applications in various technical fields
Implementation Method 2
Plastic waveguides form thermally insulating links that enable broadband radio transmissions
Implementation Method 3
a first signal comprising a first carrier frequency modulated by a first signal carrying a first useful information and a first reference signal generated by a first local oscillator of the first transceiver device, said first transceiver device being configured to transmit said first signal and said first reference signal through the plastic waveguide to a second transceiver device
Data Source
Figure 1~2
Figure 3
AI summary
System for bidirectional transmission in a plastic waveguide of a plurality of signals, between a first transmitter-receiver device and a second transmitter-receiver device, the plurality of signals comprising a useful information carrier signal and one or more reference signals generated by one or more local oscillators on different frequencies, the first transmitter-receiver device being a power radio transmitter-receiver device, the second transmitter-receiver device being a zero-consumption multi-signal transmitter-receiver device which includes a passive transmitter and a passive receiver.