Power spectrum of an injection-locked Josephson oscillator
Experiments have shown that a Josephson oscillator, exposed to a weak narrow-band input signal, exhibits behavior characteristic of an injection-locked oscillator. When in lock, Adler's theory of injection locking describes the experimental observations reasonably well. The range of applicability of the theory is extended to the out-of-lock regime where a spectrum of output frequencies is observed. Obtaining the theoretical output power spectrum requires solving a differential equation having the same form as the equation describing the resistively shunted junction model of Stewart and of McCumber. Experimental measurements of the output spectrum of a nearly locked Josephson oscillator are shown to be in reasonable agreement with the theory. Additional results discussed briefly include the observation of a frequency dependence of the locked Josephson oscillator output and experiments in which a Josephson oscillator-mixer was injection locked by a weak signal at the rf. (auth)
- Research Organization:
- Univ. of Rochester, NY
- NSA Number:
- NSA-33-017107
- OSTI ID:
- 4121946
- Journal Information:
- IEEE Trans. Magn., v. MAG-11, no. 2, pp. 800-803, Journal Name: IEEE Trans. Magn., v. MAG-11, no. 2, pp. 800-803; ISSN IEMGA
- Country of Publication:
- United States
- Language:
- English
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