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Browse Prior Art Database

Traveling Wave Tube

IP.com Disclosure Number: IPCOM000098893D
Original Publication Date: 1958-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Thomas, LH: AUTHOR

Abstract

The electron beam of the traveling wave deflection tube is directed transversely to the direction of the traveling wave. The electrode structures have an elongated configuration, which is substantially uniform in cross-section along which the traveling wave is guided.

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Traveling Wave Tube

The electron beam of the traveling wave deflection tube is directed transversely to the direction of the traveling wave. The electrode structures have an elongated configuration, which is substantially uniform in cross-section along which the traveling wave is guided.

In a schematic view of the output end of the tube, a cylindrical drift space having a radius R is defined by a slotted electrode 2 and spaced electrodes 3 and 4 which are joined by a grid 5. A radially, inwardly directed electron beam is provided from a coaxal, cylindrical-cathode electron gun 6 including inclined beam forming edge extensions. The electron beam is precisely focused through the grid 5 and the slot of electrode 2 to impinge upon a collecting anode 7. By means of input signals applied across the remote ends of deflecting electrodes 8 and 9, the electron beam can be deflected in either direction to cause the beam to miss the slotted electrode 2 to achieve a switching effect. The output signal is collected at the near end of anode 7 and electrodes 2, 3, and 4.

The far end of collector anode 7 and the near ends of deflecting electrodes 8 and 9 are terminated with appropriate impedances. The cathode 6 is biased by 10 to about minus 25 volts.

This device can be used for dealing with frequencies up to about 10 kilomegacycles, when the cylindrical drift space radius R equals 0. 14 millimeters, before encountering serious power losses. With R equal to 1.4 millimeters, the d...