Browse Prior Art Database

Double Range Variable Delay Line

IP.com Disclosure Number: IPCOM000061658D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Davidson, A: AUTHOR [+3]

Abstract

This article relates generally to delay lines for electrical signals and more particularly to mechanically variable delay lines wherein the delay line itself is a coplanar waveguide. Referring to the drawing, the system consists of coplanar stripline 10 made of copper, nickel, or other suitable conducting metal laminated onto or otherwise manufactured on a suitable substrate (not shown). The substrate may be in the shape of a disk to allow rotation, or rectangular to allow translation of the substrate. Wideband connection is made to the coplanar stripline 10 by small spring-loaded sliding contacts 12, allowing relative motion of the coplanar stripline 10 and the contacts 12.

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Double Range Variable Delay Line

This article relates generally to delay lines for electrical signals and more particularly to mechanically variable delay lines wherein the delay line itself is a coplanar waveguide. Referring to the drawing, the system consists of coplanar stripline 10 made of copper, nickel, or other suitable conducting metal laminated onto or otherwise manufactured on a suitable substrate (not shown). The substrate may be in the shape of a disk to allow rotation, or rectangular to allow translation of the substrate. Wideband connection is made to the coplanar stripline 10 by small spring-loaded sliding contacts 12, allowing relative motion of the coplanar stripline 10 and the contacts 12. It is understood that a pulse introduced to the stripline 10 through the sliding contact 12 will split into two pulses, one traveling in each direction toward the two ends of the stripline 10. Let the total delay from one end of the stripline 10 to the other be T nanoseconds. The timing of two events may then be compared to the arrival times of the two pulses at opposite ends of the stripline 10 which may be varied by moving the sliding contact 12 between the two ends. If the sliding contact 12 starts at the right hand side, the pulse arriving at the left end will be delayed relative to the right end by T nanoseconds. If the sliding contact 12 is now moved to the left end, the pulse at the left end will now precede the pulse at the right end by T nanoseconds....