Oscillators – With distributed parameter resonator
Reexamination Certificate
2006-07-11
2006-07-11
Kinkead, Arnold (Department: 2817)
Oscillators
With distributed parameter resonator
C331S1170FE, C331S1070DP, C331S175000, C331S1070DP, C331S068000
Reexamination Certificate
active
07075378
ABSTRACT:
A high spectral purity microwave oscillator is provided. The Oscillator uses an air-dielectric cavity and employs the known carrier-suppression technique. In one embodiment, the oscillator employs a high-Q cavity to self-sustain an oscillating signal formed by feeding back into its input a power-amplified output signal of the cavity in which residual phase noise in the amplifier stages is suppressed. A bandpass filter selects the cavity mode. FIG.1illustrates this embodiment. Another embodiment suppresses the noise of a voltage-controlled oscillator whose frequency and power-amplified output interrogates the cavity mode. FIG.2illustrates this embodiment.
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“Future Trends in the Development of Ultra-Low Noise Microwave Oscillators with Interfermetric Signal Processing”; E.N. Ivanov and M.E. Tobar; Proc. 1999 Joint Meeting EFTF-IEEE IFCS, Besancon, France, pp. 552-556.
Gupta Amitava Sen
Howe David A.
Nelson Craig
Walls Fred L.
Kinkead Arnold
Stevens Davis Miller & Mosher L.L.P.
The United States of America as represented by the Secretary of
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