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Method for Characteristic Impedance Measurements of Coaxial Cables

IP.com Disclosure Number: IPCOM000040541D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Costa, NS [+details]

Abstract

This article relates to the field of measurement techniques. Its achievement is to have a precise, repetitive way to have a coaxial cable characterized according to its electrical properties, instead of using the known approach of measuring the Velocity of Propagation by resonating the coaxial cable sample under test (SUT) with its far-end left as an open circuit which leaves space for erratic measurement errors. The present methods in use generally deal with low frequency capacitance measurements or time domain reflectometry, being strongly dependent on the sample's far-end status, frequently left open or short circuited, consistently presenting non-repeatable results.