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Elongated High-Frequency Amplifier Tubes

IP.com Disclosure Number: IPCOM000098857D
Original Publication Date: 1958-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Thomas, LH: AUTHOR

Abstract

These elongated high-frequency electron discharge devices have electrodes which are formed as extensions of the conductors of the input and output signal transmission lines. Each of the transmission lines includes a flat ribbon center conductor surrounded by a flattened helix and an outer sheath.

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Elongated High-Frequency Amplifier Tubes

These elongated high-frequency electron discharge devices have electrodes which are formed as extensions of the conductors of the input and output signal transmission lines. Each of the transmission lines includes a flat ribbon center conductor surrounded by a flattened helix and an outer sheath.

The cathode is an extension of the center conductor of the input transmission line, while the anode is an extension of the helix of the output transmission line. Similarly, the control and screen grids are respectively extensions of the helix of the input line and the mutually connected portions of the sheaths of both lines.

A very important feature of this construction is that it will handle a very wide range of frequencies without serious distortion. For instance, with a cathode width of about one centimeter, and with other dimensions proportioned to the same scale as shown, and with a tube (envelope) length in the order of three centimeters, frequencies from zero up to several kilomegacycles can be handled. With smaller dimensions, still higher frequencies can be handled.

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