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Proceedings Paper

Signal de-embedding when standard two-port VNA measurements are not possible
Author(s): A. Wargo; B. V. Beeman; C. Brown; P. Bell
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Paper Abstract

The goal of this paper is to outline the process for characterizing the S-parameters of passive two-port electrical devices to calculate the input signal from a measured output signal when standard two-port VNA measurements are not possible. For long cables such as those used at NIF to transmit analog electrical signals long distances from target diagnostics to their respective data digitizer, standard two-port VNA measurements cannot be used to determine the cables’ transfer functions due to the large physical separations between the ports of the cables. Traditionally, this problem was addressed by recording input and output waveforms with two oscilloscopes and then comparing their spectral composition. A new method is to take reflection measurements at one port and substitute three known loads at the other port to generate a system of simultaneous equations that will allow for S21 to be quantified.

Paper Details

Date Published: 6 September 2017
PDF: 7 pages
Proc. SPIE 10390, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI, 1039004 (6 September 2017); doi: 10.1117/12.2275593
Show Author Affiliations
A. Wargo, Lawrence Livermore National Lab. (United States)
B. V. Beeman, Lawrence Livermore National Lab. (United States)
C. Brown, Lawrence Livermore National Lab. (United States)
P. Bell, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 10390:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI
Jeffrey A. Koch; Gary P. Grim, Editor(s)

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