中国物理B ›› 2010, Vol. 19 ›› Issue (6): 67402-067402.doi: 10.1088/1674-1056/19/6/067402

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Simulation of dielectric resonator for high-Tc radio frequency superconducting quantum interference device

高吉, 杨涛, 马平, 戴远东   

  1. School of Physics and State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China
  • 收稿日期:2009-11-10 出版日期:2010-06-15 发布日期:2010-06-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No.~2006CB601007), the National Natural Science Foundation of China (Grant No.~10674006), the National High Technology Research and Development Program of China (Grant No.~2007AA03Z2

Simulation of dielectric resonator for high-Tc radio frequency superconducting quantum interference device

Gao Ji(高吉), Yang Tao(杨涛), Ma Ping(马平)†, and Dai Yuan-Dong(戴远东)   

  1. School of Physics and State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China
  • Received:2009-11-10 Online:2010-06-15 Published:2010-06-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No.~2006CB601007), the National Natural Science Foundation of China (Grant No.~10674006), the National High Technology Research and Development Program of China (Grant No.~2007AA03Z2

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摘要： Nowadays, the high-critical-temperature radio frequency superconducting quantum interference device (high-T_{\rm c } rf SQUID) is usually coupled to a dielectric resonator that is a standard 10\times 10\times 1~mm3 SrTiO3 (STO) substrate with a YBa2Cu3O_{7 - \delta } (YBCO) thin-film flux focuser deposited on it. Recently, we have simulated a dielectric resonator for the high-T_{\rm c } rf SQUID by using the ANSOFT High Frequency Structure Simulator (ANSOFT HFSS). We simulate the resonant frequency and the quality factor of our dielectric resonator when it is unloaded or matches a 50-\Omega impedance. The simulation results are quite close to the practical measurements. Our study shows that ANSOFT HFSS is quite suitable for simulating the dielectric resonator used for the high-Tc rf SQUID. Therefore, we think the ANSOFT HFSS can be very helpful for investigating the characteristics of dielectric resonators for high-Tc rf SQUIDs.

Abstract: Nowadays, the high-critical-temperature radio frequency superconducting quantum interference device (high-$T_{\rm c }$ rf SQUID) is usually coupled to a dielectric resonator that is a standard $10\times 10\times 1$ mm3 SrTiO3 (STO) substrate with a YBa2Cu3O$_{7 - \delta}$  (YBCO) thin-film flux focuser deposited on it. Recently, we have simulated a dielectric resonator for the high-$T_{\rm c}$ rf SQUID by using the ANSOFT High Frequency Structure Simulator (ANSOFT HFSS). We simulate the resonant frequency and the quality factor of our dielectric resonator when it is unloaded or matches a 50-$\Omega$ impedance. The simulation results are quite close to the practical measurements. Our study shows that ANSOFT HFSS is quite suitable for simulating the dielectric resonator used for the high-Tc rf SQUID. Therefore, we think the ANSOFT HFSS can be very helpful for investigating the characteristics of dielectric resonators for high-Tc rf SQUIDs.

Key words: dielectric resonator, YBCO, rf SQUID, HFSS

中图分类号:  (Superconducting quantum interference devices (SQUIDs))

  • 85.25.Dq
85.25.Am (Superconducting device characterization, design, and modeling) 85.50.-n (Dielectric, ferroelectric, and piezoelectric devices) 74.62.-c (Transition temperature variations, phase diagrams)