Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

Fabrication of a High-performance Oscillator with a Tunable High-Q HTS $YBa_2Cu_3O_{7-\delta}$ Resonator

High-Q $Yba_2Cu_3O_{7-\delta}$ 고온초전도체 공진기를 이용한 주파수 튜닝이 가능한 고성능 발진기 제작

  • Yang Woo Il (Department of Physics, Konkuk University) ;
  • Lee Jae Hun (Department of Physics, Konkuk University) ;
  • Hur Jung (Department of Electronic engineering, Konkuk University) ;
  • Lee Sang Young (Department of Physics, Konkuk University)
  • Published : 2005.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

We investigated the phase noise of an oscillator with a extremely high-Q resonator used as the resonant element. A TE$_{011}$ mode rutile-loaded resonator with high-temperature superconductive (HTS) $YBa_2Cu_3O_{7-\delta}$(YBCO) films used as the endplates is prepared for this purpose. At 23.5 K, the unloaded Q and the loaded Q are 863000 and 180000, respectively. The phase noise of -104.8 dBc/Hz at 1 KHz offset was observed for the oscillator having a resonator with $Q_{L}$ =180000 at the $TE_{01\delta$ mode resonant frequency of 8.545 GHz at 23.5 K Such oscillators with very low phase noise are expected to be used for building up communication systems capable of efficient use of the frequency band and high-speed data transmission as well as for Doppler radars. Frequency tuning could be realized for the resonator by using a piezoactuator Applicability of the tunable rutile resonator for fabricating tunable oscillators of high performances is discussed.

위상잡음(phase noise)이 작은 발진기(oscillator)는 주파수 대역의 효율적 활용과 고속의 데이터 전송을 가능하게 하는 통신 시스템의 구축과 Doppler 효과를 이용하는 RADAR의 제작을 위한 핵심소자로서 발진기의 위상잡음은 공진부의 loaded Q($Q_{L}$)값이 클수록 작아진다. 본 논문에서는 고온초전도 $YBa_2Cu_3O_{7-\delta}$(YBCO) 박막을 사용하여 $TE_{011}$ 모드 고온초전도 YBCO-루타일 공진기를 제작하고 이 공진기가 공진단으로 사용된 발진기 특성의 시뮬레이션, 발진기 제작 및 위상잡음 측정 연구를 수행하였다. 23.5 K 및 $TE_{01\delta}$ 모드 공진주파수인 8.545 GHz에서 $Q_{L}$=180000 인 고온초전도 YBCO-루타일 공진기를 사용하여 제작된 발진기의 위상잡음은 1 KHz offset에서 -104.8 dBc/Hz 정도의 매우 작은 값을 지님을 확인하였다. Piezoactuator를 이용한 상온에서의 발진기 주파수의 튜닝 결과를 제시하고, 이러한 공진기가 사용된, 튜닝 가능한 고성능 발진기의 제작 가능성에 대해 논의하였다.

Keywords

References

  1. D. B. Leeson, 'A simple model of feedback oscillator noise spectrum',Proc. IEEE, Vol. 54, pp. 329-330, February 1966 https://doi.org/10.1109/PROC.1966.4682
  2. I. S. Ghosh, N. Tellmann, D. Scholen and N. Klein, 'Low phase noise microwave oscillator based on HTS shielded dielectric resonator', IEEE Trans. Appl. Supercond, Vol. 7, No.2, pp. 3071-3074, June 1997 ; Indra S. Ghosh, Detlev Schemion, Norbert Klein, 'Temperature Compensated High-Q Dielectric Resonator for Long Term Stable Low Phase Noise Oscillator' IEEE Int Frequency Control Symposium, pp. 1024-1029, 1997 https://doi.org/10.1109/77.621981
  3. Indra S. Ghosh, Detlev Schemion, Norbert Klein, 'Temperature Compensated High-Q Dielectric Resonator for Long Term Stable Low Phase Noise Oscillator' IEEE Int Frequency Control Symposium, pp. 1024-1029, 1997 https://doi.org/10.1109/FREQ.1997.639226
  4. Zvi Galani, Michael J. Bianchini, Raymond C. Waterman, Jr., Robert Dibiase, Richard W. Laton and J. Bradford Cole, 'Analysis and design of a single-resonator GaAs FET oscillator with noise degeneration', IEEE Trans. Microwave Theory Tech, Vol. 32, No. 12, pp. 1556-1565, December 1984 https://doi.org/10.1109/TMTT.1984.1132894
  5. J. H. Lee, W. I. Yang, M. J. Kim, J. C. Booth, K. Leong, S. Schima, David Rudman, and S. Y. Lee, 'Accurate measurements of the intrinsic surface impedance of thin $YBa_2Cu_3O_{7-{\delta}}$ Films using a modified two-tone resonator method', IEEE Trans. Appl. Supercond, Vol. 15, No, 2, pp. 3700-3705, June 2005 https://doi.org/10.1109/TASC.2005.849399
  6. J. H. Lee, J. Lim, S. H. Moon, J. H. Yoon, Y. H. Choi, B. Oh, and Sang Young Lee, 'Microwave Properties of Large YBCO Films on As-prepared and Annealed MgO Substrates', IEEE Trans. Appl. Supercond., vol. 13 (2), pp. 2875-2878, June 2003 https://doi.org/10.1109/TASC.2003.812029
  7. Jung Hun Lee, J. S. Ryu, J. H. Lee, J. Lim, S. H. Moon, B. Oh and Sang Young Lee, 'Measurements of the Loss Tangent of Rutile Using an Extremely High-Q Sapphire-loaded Cavity Resonator with $YBa_2Cu_3O_{7-{\delta}}$ Endplates', J. Korean Phys. Soc., vol.39(6), pp.1065-1071, December 2001
  8. N. Klein, N. Tellmann, U. Dahne, A. Scholen, H. Schulz, G. Hofer and H. Kratz, 'YBCO shielded $LaAlO_3$ dielectric resonator for stable oscillator', IEEE Trans. Appl. Supercond., Vol. 5, No.2, pp. 2663-2666, June 1995 https://doi.org/10.1109/77.403138
  9. S. Vitusevich, M. Winter and N. Klein, 'Cryogenic high-Q microwave resonators for stable oscillators', IEEE Trans. Appl. Supercond., Vol. 11, No.1, pp. 1195-1198, March 2001 https://doi.org/10.1109/77.919563
  10. Cynthia L. Baker, 'Introduction to Single Chip Microwave PLLs', National Semiconductor Application Note 885, 1995