ANALYSIS OF IMPEDANCE PROFILES AND STRUCTURAL RETURN LOSS OF HIGH QUALITY COAXIAL CABLES

Authors
  1. Rice, D.W.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN);Defence Research Board, Ottawa ONT (CAN) Chief of Plans
Abstract
Transmission-line theory is applied to the calculation of the transmission and reflection errors which occur in a transmission line that has small impedance discontinuities along its length. The discontinuities are typical of those arising in coaxial cables as a result of the manufacturing process. Errors arising from mismatches in the source and terminating impedances are also calculated. The results indicate that errors in phase up to several degrees are possible in the CRC High Frequency Direction Finding array, due to such imperfections. The solution to the inverse problem of computing the transmission line impedance profile from measurements of the reflection characteristics of the line is also outlined, and some restrictions which apply when the reflection properties are measured with swept-frequency equipment are derived.
Report Number
TELS-11 —
Date of publication
15 Mar 1972
Number of Pages
29
DSTKIM No
72-04531
CANDIS No
15198
Format(s):
Hardcopy;Originator's fiche received by DSIS

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