Design and characterization of all-cryogenic low phase-noise sapphire K-band oscillator for sattelite communication

Vitusevich, S. A.; Gosh, I. S.; Schieber, K.; Spinnler, M.; Klein, N.

doi:10.1109/TMTT.2002.806931

Journal Article

PreJuSER-30021

Design and characterization of all-cryogenic low phase-noise sapphire K-band oscillator for sattelite communication

Vitusevich, S. A.FZJ* ; Schieber, K. ; Gosh, I. S. ; Klein, N.FZJ* ; Spinnler, M.

2003
IEEE New York, NY

IEEE transactions on microwave theory and techniques 51, 163 - 169 (2003) [10.1109/TMTT.2002.806931]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/2075 doi:10.1109/TMTT.2002.806931

Abstract: An all-cryogenic oscillator consisting of a frequency-tunable sapphire resonator, a high-temperature superconducting filter and a pseudomorphic high electron-mobility transistor amplifier was designed for the K-band frequency range and investigated. Due to the high quality factor of the resonator above 1000 000 and the low amplifier phase noise of approximately -133 dBc/Hz at a frequency offset of 1kHz from the carrier, we have achieved oscillator phase-noise values superior to quartz-stabilized oscillators at the same carrier frequency for offset frequencies higher than 100 Hz. In addition to, low phase noise, our prototype oscillator possesses mechanical and electrical frequency tunability. We have implemented a two-step electrical tuning arrangement consisting of a varactor phase shifter integrated within the amplifier circuit (fine tuning by 5'kHz) and a dielectric plunger moved by a piezomechanical transducer inside the resonator housing (course tuning by 50 kHz). This tuning range is sufficient for phase locking and for electronic compensation of temperature drifts occurring during operation of the device employing a miniaturized closed-cycle Stirling-type cryocooler.

Keyword(s): J ; dielectric resonator oscillator (auto) ; oscillator noise (auto) ; phase noise (auto) ; satellite communication (auto)