RF amplifier including traveling wave tube with sequential stage

Details RF amplifier including traveling wave tube with sequential stage RF amplifier including traveling wave tube with sequential stage

1995-11-08

1998-11-10

Mottola, Steven

Amplifiers

With traveling wave-type tube

315 36, H03F 358

Patent

active

058349715

ABSTRACT:
Multiple gain stages are provided in a single traveling wave tube amplifier (TWTA). Each gain stage comprises an interaction circuit, an associated RF input, and an associated RF output. The gain stages are separated by a drift length that is selected to achieve a desired interaction between gain stages. In one embodiment that uses only one TWT, couplers, and adjustment blocks external to the TWT, feed-forward and feedback connections remove intermodulation distortion introduced by the TWTA.

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patent: 5162747 (1992-11-01), Tammaru
patent: 5402085 (1995-03-01), Cole
Walchli, Pamela L. et al.; "Traveling-Wave Tubes"; Electronic Engineers'Handbook; 3rd Edition; 1989; pp. 9-45 to 9.-51.
Mendel, J. T.; "Magnetic Focusing of Electron Beams"; Proc. IRE; vol. 43; 1995; pp. 327-331.
Seidel, H.; "A Microwave Feed-Forward Experiment"; The Bell System Technical Journal; vol. 50; No. 9; Nov. 1971; pp. 2879-2916.
Rowe, J. E.; Nonlinear Electron-Wave Interaction Phenomena; New York; Academic Press; 1965; pp. 177-262 and 550-569.
Rosen, H. A. et al.; "Power Amplifier Linearity Studies for SSB Transmissions"; IEEE Transactions on Communications Systems; Jun. 1965; pp. 150-159.
Rizzi, Peter A.; Microwave Engineering, Prentice Hall, Inc.; 1968; pp. 299.410.

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