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Transmission Line

IP.com Disclosure Number: IPCOM000093923D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Wallis, CN: AUTHOR [+2]

Abstract

One line of a pair of lines, suitable for driving a thin-film storage device, is shown. The other line of the pair can either be similarly shaped or it can be a ground plane.

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Transmission Line

One line of a pair of lines, suitable for driving a thin-film storage device, is shown. The other line of the pair can either be similarly shaped or it can be a ground plane.

The line has thickened portions which gradually increase in width. It is of constant width where it crosses thin-film elements A.

As the average width of the line gradually increases, its impedance gradually decreases. This impedance decrease is arranged such that drive currents passing through the line are not attenuated.

The reduction of width where the line crosses elements A insures that the current density at each of these portions of the line remains substantially constant. In order to prevent reflections, the periodicity of the width variation is made small compared with the shortest wave-length of signals transmitted along the line.

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