S- And X-Band Superconducting Cavity Stabilized Oscillators

Jiménez, J.; Septier, A.

doi:10.1109/freq.1973.199986

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…5, we depict the superconducting cavity oscillator. This oscillator concept has been recently developed and studied, and it has demonstrated stability performance which exceeds that of any other-lcgown oscillator [23,24]. In fact, stabilities in the 10 region have been realized at averaging times of hundreds of seconds 1251.…”

Section: Potentially Available Standardsmentioning

confidence: 99%

A review of precision oscillators

Hellwig

1975

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Precision oscillators used in PTTI applications include quartz crystal, rubidium gas cell, cesium beam, and hydrogen maser oscillators. A general characterization and comparison of these devices is given including accuracy, stability, environmental sensitivity, size, weight, power consumption, availability and cost. Areas of special concern in practical applications are identified and a projection of future performance specifications is given. An attempt is made to predict physical and performance characteristics of new designs potentially available in the near future.

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Section: Potentially Available Standardsmentioning

confidence: 99%

A review of precision oscillators

Hellwig

1975

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“…Three methods have so far been employed. The first is direct coupling of an oscillator to the cavity (see for example Jimenez et a1 1971, Jimenez and Septier 1973) where stabilisation is achieved by passive phase locking, The second method consists of electronic stabilisation of an oscillator by using the sc as a frequency discriminator (Stein andTurneare 1973, Stein 1974). The third method also utilises passive locking, but employs a complex coupling of three cavities, the third of which is superconducting (Braginskii et a1 1976).…”

Section: Introductionmentioning

confidence: 99%

Ultra-low phase noise superconducting-cavity stabilised microwave oscillator with application to gravitational radiation detection

Mann

Blair

1983

J. Phys. D: Appl. Phys.

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A superconducting-cavity stabilised oscillator has been constructed which combines active and passive stabilisation of a 9.6 GHz klystron to obtain a phase noise power spectral density between -170 dB Hz-1 and -180 dB Hz-1 at 5 kHz from the carrier, which represents about 40 dB improvement over the state-of-the-art. The device has been developed for use as a low noise pump for a superconducting parametric upconverter transducer on a gravitational radiation antenna. An RF modulated reflex klystron is actively locked to a TE011 niobium cavity operated at 2K with a loaded Q approximately 108. Power is extracted from the cavity which acts as a high Q filter.

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Superconducting cavity stabilized oscillators by self‐injection locking

Komiyama¹,

Yasudas²

1980

Electron. Comm. Jpn. Pt. I

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In the superconducting cavity stabilized oscillator (SCO), which has extremely high‐frequency stability, the power input to the superconducting cavity (SC) must be minimized since the energy stored in the SC causes a shift in the resonance frequency away from its value at zero stored energy due to the electromagnetic radiation pressure and nonlinear surface reactance. Therefore, in the SCO with self‐injection locking, a loosely coupled directional coupler is used to couple a free running oscillator to an SC. This paper describes the design of self‐injection‐locked SCO's. The effects on frequency stability of the SC coupling factor and electrical line length between the SC and oscillating device are discussed. Oscillation frequency is given as a function of electrical line length. Optimum line length is discussed and the stability criteria for the oscillating device are derived. Based on this design consideration, an X‐band Gunn effect oscillator is stabilized. The SC is fabricated from solid Nb and has an unloaded Q‐factor of 6.7 × 106. The noise floor of frequency stability as low as 8.5 × 10‐11 has been obtained.

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S- And X-Band Superconducting Cavity Stabilized Oscillators

Cited by 8 publications

References 12 publications

A review of precision oscillators

A review of precision oscillators

Ultra-low phase noise superconducting-cavity stabilised microwave oscillator with application to gravitational radiation detection

Superconducting cavity stabilized oscillators by self‐injection locking

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