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Browse Prior Art Database

Very High Frequency Adjustable Delay Line

IP.com Disclosure Number: IPCOM000050122D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Kacur, JA: AUTHOR [+4]

Abstract

This article describes an adjustable delay line for delaying pulses or high frequency electrical signals. The delay line features use of a delay element in the form of a helical signal conductor imbedded in an insulating layer which is positioned in the groove of a helically grooved rotatable metallic cylinder. The line also features a signal pick off probe mounted for mechanical movement relative to the signal conductor and along the signal conductor's length to provide variable delay of an applied signal.

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Very High Frequency Adjustable Delay Line

This article describes an adjustable delay line for delaying pulses or high frequency electrical signals. The delay line features use of a delay element in the form of a helical signal conductor imbedded in an insulating layer which is positioned in the groove of a helically grooved rotatable metallic cylinder. The line also features a signal pick off probe mounted for mechanical movement relative to the signal conductor and along the signal conductor's length to provide variable delay of an applied signal.

More particularly, this article considers a delay line having a variable delay of up to 20 nanoseconds which may be mechanically and automatically operated. The line is constructed using conventional strip line techniques and, as shown in Figs. 1 and 2, includes an input terminal 1 for receiving signals to be delayed; a signal conductor carriage 2 in the form of a metallic cylinder having a helical groove 3; a layer of insulating material 4 located within at least a portion of groove 3, particularly at the groove base; a signal conductor 5 of predetermined length, at least partially imbedded in insulating layer 4. Signal conductor 5 is electrically connected at one end to input terminal 1. The line also features a pick off probe 6 having a contact element 7 and a conductive contact shroud 8 displaced from and surrounding at least a portion of element 7. Probe 6 is mounted on a carriage 9. A frame 10 is provided for mou...