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A Mixing Modeling Method Based on High Temperature Superconducting Josephson Junction

A technology of high temperature superconductivity and modeling method, which is applied in complex mathematical operations, instruments, design optimization/simulation, etc. Effect

Active Publication Date: 2022-03-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the particularity of the high-temperature superconducting Josephson junction, the theoretical derivation and model establishment of its mixing analysis are very difficult, and no one has given a correct and feasible harmonic mixing proposal based on the high-temperature superconducting Josephson junction. Modular analysis method

Method used

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  • A Mixing Modeling Method Based on High Temperature Superconducting Josephson Junction
  • A Mixing Modeling Method Based on High Temperature Superconducting Josephson Junction
  • A Mixing Modeling Method Based on High Temperature Superconducting Josephson Junction

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Embodiment 1

[0070]A mixing modeling analysis method based on high-temperature superconducting Josephson junctions described in the present invention provides a powerful tool for the mixing analysis and performance prediction of high-temperature superconducting Josephson junctions, including fundamental frequency mixing and harmonic mixing The specific derivation process is as follows:

[0071] Corresponding to step 1, the circuit model is established based on the parasitic signal selection method;

[0072] Corresponding to steps 1.1~1.3, such as figure 1 As shown, the middle part of the equivalent circuit of the model is the equivalent circuit of the Josephson junction, which is an RSJ model, that is, the resistor R is connected in parallel, and is composed of an independent thermal noise current δI nn drive; the upper end of the equivalent circuit is the DC bias circuit of the Josephson junction and the loaded local oscillator circuit, including the DC current I dc , DC source voltage ...

Embodiment 2

[0190] For example 1, a high-temperature superconducting Josephson junction-based mixing modeling method is proposed, and a fourth harmonic high-temperature superconducting Josephson junction mixer is used for experimental verification.

[0191] The mixer has very good radiated coupling and isolation at frequencies around 160GHz and 640GHz, so it is a fourth harmonic mixer. The temperature of the experiment was regulated by a small refrigerator. The impedance at different frequencies used in the experiment is shown in Table 2.

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Abstract

The invention relates to a frequency mixing modeling method based on a high-temperature superconducting Josephson junction, and belongs to the technical fields of microwave and terahertz communication and high-temperature superconducting. Including modeling based on spurious signal selection, hybrid solution of impedance matrix, noise matrix solution, and solution of noise temperature and conversion gain expressions: 1) Based on spurious signal selection, a six-port model is established; 2) Hybrid solution of impedance matrix, including single 3) Solve the noise matrix; 4) Solve the conversion gain and noise temperature. The superconducting mixer designed by the mixing modeling method has the advantages of low noise, extremely wide intermediate frequency bandwidth, high frequency upper limit, and low power demand; it overcomes the fact that the calculation speed of the existing method is very slow and the noise temperature of the mixer cannot be calculated And can not give the defect of conversion gain. And it can not only analyze the fundamental frequency mixing, but also give the expressions of harmonic mixing conversion gain and noise temperature, which has broad application prospects; the built model is proposed for the first time, and it is universal.

Description

technical field [0001] The invention relates to a frequency mixing modeling method based on a high-temperature superconducting Josephson junction, and belongs to the technical fields of microwave and terahertz communication and high-temperature superconducting. Background technique [0002] Compared with conventional semiconductor terahertz mixers, superconducting mixers have the advantages of low noise, extremely wide IF bandwidth, high frequency upper limit, and low power requirements; and compared with low-temperature superconducting mixers, high-temperature superconducting mixers The low-temperature facilities that need to be used in the device are more miniaturized and cheaper, and it has a good application prospect as a front-end device of a terahertz communication system. [0003] However, many terahertz mixers based on high-temperature superconducting technology use harmonic mixing, which has the advantage of reducing the frequency of the local oscillator signal and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F17/13G06F17/14G06F119/08G06F119/10
CPCG06F30/20G06F17/141G06F17/13G06F2119/08G06F2119/10
Inventor 高翔李焕新卜祥元安建平刘珩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY