Title: Low noise modular parametric amplifier

Abstract: The low noise parametric amplifier disclosed is a non-cryogenic non-redundant plural stage unit with excess gain such that failure of any one stage results in only minor degradation of signal-to-noise ratio. While the amplifier is of general application, it is specifically intended for use in the receiver of an unattended earth terminal of a satellite communication system. In this environment, reliability is achieved by employing a plurality of cascaded, modular parametric amplifier stages. Each stage includes a varactor diode, a pump circuit with its oscillator, a bias circuit, and temperature stabilizing circuitry employing a Peltier junction. The stages are connected to a multi-port circulator by quick disconnect couplings which permit the modular amplifier stages to be removed and replaced without any interruption in the operation of the amplifier.

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Inventors: Getsinger, William J. (Bethesda, MD, US)
Koskos, Paul (Potomac, MD, US)
Chou, Su Min (Potomac, MD, US)

Application Number: 475343
Filing Date: 1974-05-31
Publication_date: 1976-01-20
Assignee: Communications Satellite Corporation (Comsat) (Washington, DC)
Primary Class(es): 330/4.5 330/4.9, 330/53, 333/1.1
Other Classes:
US Patent Ref:

3284717

Nov, 1966

Damiano et al.

330/4.

Other Refs:
Primary Examiner: Rolinec, R. V.
Assistant Examiner: Hostetter, Darwin R.
Attorney: Sughrue, Rothwell, Mion, Zinn & Macpeak