Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1978-02-09
1980-02-05
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
331 94, 333 24R, H01S 100
Patent
active
041874706
ABSTRACT:
A dielectrically loaded four-port waveguide circulator is used with a reflected-wave maser connected to a second port between first and third ports to form one of a plurality of cascaded maser waveguide structures. The fourth port is connected to a waveguide loaded with microwave energy absorbing material. The third (output signal) port of one maser waveguide structure is connected by a waveguide loaded with dielectric material to the first (input) port of an adjacent maser waveguide structure, and the second port is connected to a reflected-wave maser by a matching transformer which passes the signal to be amplified into and out of the reflected-wavemaser and blocks pumping energy in the reflected-wave maser from entering the circulator. A number of cascaded maser waveguide structures may thus be housed in a relatively small volume of conductive material placed within a cryogenically cooled magnet assembly.
REFERENCES:
patent: 3002156 (1961-09-01), Boyle et al.
patent: 3064201 (1962-11-01), Damon
patent: 3117282 (1964-01-01), Wessel
patent: 3316506 (1967-04-01), Whicker et al.
patent: 3626335 (1971-12-01), Hord et al.
patent: 3761843 (1972-05-01), Cappucci
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patent: 3978417 (1976-08-01), Clauss
Arams et al., "Packaged Tunable L-Bond Maser System," 5/60, pp. 866-874 Proceeding of the IRE.
Clauss Robert C.
Frosch Robert A. Administrator of the National Aeronautics and Space
Quinn Rex B.
Manning John R.
McCaul Paul F.
Moskowitz Nelson
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