Superconducting Quantum Arrays for Broadband RF Systems

11th European Conference on Applied Superconductivity

Kornev, V.^1 ; Sharafiev, A.^1 ; Soloviev, I.^1 ; Kolotinskiy, N.^1 ; Mukhanov, O.^2

Lomonosov Moscow State University, Leninsky Gory 1, Moscow

119991, Russia^1

Hypres, Inc., 175 Clearbrook Road, Elmsford

NY

10523, United States^2

关键词: Broadband radio;    Electric connections;    Electrically small antenna (ESAs);    High dynamic range;    HYPRES niobium process;    Magnetic signals;    Measured voltages;    Voltage transfer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/4/042019/pdf
DOI  :  10.1088/1742-6596/507/4/042019

来源: IOP

【 摘 要 】

Superconducting Quantum Arrays (SQAs), homogenous arrays of Superconducting Quantum Cells, are developed for implementation of broadband radio frequency (RF) systems capable of providing highly linear magnetic signal to voltage transfer with high dynamic range, including active electrically small antennas (ESAs). Among the proposed quantum cells which are bi-SQUID and Differential Quantum Cell (DQC), the latter delivered better performance for SQAs. A prototype of the transformer-less active ESA based on a 2D SQA with nonsuperconducting electric connection of the DQCs was fabricated using HYPRES niobium process with critical current density 4.5 kA/cm2. The measured voltage response is characterized by a peak-to-peak swing of ∼100 mV and steepness of ∼6500 μV/μT.