Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1987-12-08
1989-05-09
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
315 36, 335304, H01J 2534, H05B 664
Patent
active
048292613
ABSTRACT:
A traveling wave type amplifier. The device features a pair of short helical input and output couplers through which an electron beam is projected. Application of an RF signal to the couplers serves to modulate the electron beam. A drift tube to be positioned between the couplers is dimensioned to attenuate the RF signal while permitting the modulated electron beam to pass through. An amplified output signal is extracted from the output helix. Gain of the tube is enhanced by a linearly decreasing magnetic focussing field.
REFERENCES:
patent: 4347419 (1982-08-01), Jasper
patent: 4389593 (1983-06-01), DeSantis
patent: 4564787 (1986-01-01), Kosmahl
patent: 4612476 (1986-09-01), Jasper et al.
patent: 4621218 (1986-11-01), Jasper et al.
patent: 4692732 (1987-09-01), Lenpold et al.
patent: 4701737 (1987-10-01), Lenpold
Walter Beam, "On the Possibility of an Amplification in Space-Charge-Poteal-Depressed Electron Streams," Proc. IRE, pp. 454-462, Apr. 1955.
R. E. Hayes, "A Synchronous Wave Amplifier," IEEE Transactions on Electron Devices, Mar. 1964, pp. 98-101.
T. Wesselberg, "A Thick Beam Analysis of Transverse Wave Propagation on Electron Beams". Proc. 4th International Congress on Microwave Tubes, pp. 657-663, Sep. 1962.
Bayram Vural, "Double-Stream Cyclotron Wave Amplifier", IEEE Transactions on Electron Devices, vol. Ed-15, No. 1, Jan. 1968, pp. 2-6.
M. R. Currie, et al., "The Cascade Backward-Wave Amplifier: A High Gain Voltage-Tuned Filter for Microwaves," Proc. IRE, pp. 1617-1631, Nov. 1955.
DeSantis Charles M.
Jasper, Jr. Louis J.
Kanars Sheldon
Moskowitz Nelson
Mullarney John K.
The United States of America as represented by the Secretary of
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