Traveling wave tube circuit

Details Traveling wave tube circuit Traveling wave tube circuit

1977-02-15

1978-10-03

Cratmon, Jr., Saxfield

Amplifiers

With traveling wave-type tube

315 35, 315 36, 301 82, H03F 358

Patent

active

041186710

ABSTRACT:
A traveling wave tube (TWT) has a slow wave structure (SWS) which is severed into two or more sections. A signal path, defined below, connects the end of an SWS section to the beginning of the following SWS section. The signal path comprises an impedance matching coupler (IMC), followed by an isolator, a variable phase shifter, and a second IMC. The aggregate band pass characteristic of the components in the signal path is chosen to reject, or strongly attenuate, all frequencies outside the desired operating frequency range of the TWT and yet pass, with minimal attenuation in the forward direction, all frequencies within the desired operating frequency range. The isolator is chosen to reject, or strongly attenuate, waves, of all frequencies, which propagate in the backward direction. The aggregate phase shift characteristic of the components in the signal path is chosen to apply signal power to the beginning of the following SWS section with the phase angle yielding maximum efficiency.

REFERENCES:
patent: 3027453 (1962-03-01), Carter et al.
patent: 3128433 (1964-04-01), Edson
patent: 3433992 (1969-03-01), Tancredi et al.
patent: 3678326 (1972-07-01), Heynisch
patent: 3684963 (1972-08-01), Henry
patent: 3716745 (1973-02-01), Phillips

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