Abstract
A high Q HTS cavity resonator with resonating frequency f0= 5.624 GHz was fabricated using high quality HTS film and high purity sapphire. The unloaded quality factor of the HTS resonator was as high as Q u= 1.09xl06 at the nitrogen temperature, 77 K. A HTS local oscillator combining the high Q cavity resonator with a C-band low noise GaAs HEMT amplifier was then designed and constructed. The phase noise of the oscillator, measured by a HP 3048A noise measurement system, is −134 dBc/Hz at 10 kHz offset when the temperature is 77 K. This result is close to the best level reported by other groups in the world.
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Li, H., He, A., Shi, T. et al. High temperature superconducting (HTS) C-band oscillator with phase noise of −134 dBc/Hz. Chin. Sci. Bull. 47, 423–425 (2002). https://doi.org/10.1360/02tb9098
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DOI: https://doi.org/10.1360/02tb9098