Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1976-07-26
1977-10-25
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
332 75, H01S 102
Patent
active
040558100
ABSTRACT:
An X-band traveling wave maser of the folded-comb type is provided with two figure-eight coils for gain and bandwidth control. One figure-eight coil covers the full length of the comb structure for bandwidth adjustment of an external magnetic field. The other figure-eight coil covers a central half of the comb structure for independent gain adjustment of the external magnetic field. The half of each figure-eight coil at the turn around end of the comb structure is oriented to aid the external magnetic field, and the half of each figure-eight coil at the input-output end of the comb structure is oriented to buck the external magnetic field. The maser is pumped in the push-push mode with two different frequencies.
REFERENCES:
patent: 3023366 (1962-02-01), Chester et al.
patent: 3023367 (1962-02-01), Bolef et al.
patent: 3200356 (1965-08-01), Okwit
patent: 3213382 (1965-10-01), Hensel
patent: 3541486 (1970-11-01), DeLuca et al.
patent: 3676787 (1972-07-01), Low et al.
patent: 3978417 (1976-08-01), Fletcher et al.
Thornbury et al., "Study and Investigation of an Improved Protan Maser Antenna," 10/66, pp. 1-81.
Fletcher James C. Administrator of the National Aeronautics and Space
Trowbridge David L.
Manning John R.
McCaul Paul F.
Moskowitz Nelson
Mott Monte F.
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