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Distributed magnetic sensor using reflection coefficients from both ends of single magnetic coaxial cable

Authors :
Kazuma Takenaka
Naoki Noguchi
Source :
AIP Advances, Vol 10, Iss 12, Pp 125028-125028-4 (2020)
Publication Year :
2020
Publisher :
AIP Publishing LLC, 2020.

Abstract

The principle of the distributed magnetic sensor by magneto-impedance effect with time domain reflectometry was demonstrated, and the position and strength of the magnetic field were detected simultaneously with a magnetic coaxial cable. This paper presents a distributed magnetic sensor using the forward and reverse reflection coefficients S11 and S22 from both ends of a single magnetic coaxial cable. The method using reflection coefficients includes novel features such as: (1) improvement of the signal-noise ratio for equivalent measurement time and (2) cancellation of the time fluctuation by jitter. It is confirmed that the SNR of a reflected wave with a vector network analyzer is improved by 21.3 dB compared to that of an oscilloscope. Furthermore, the attenuation of a signal wave can be compensated by synthesizing the reflected waves from both ends. As a result, the signal wave is less affected by the attenuation along the length of the cable and is improved by 19.0 dB at the position of 180 mm.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
10
Issue :
12
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.05a2090f86de45a894e510c4f73a6ba9
Document Type :
article
Full Text :
https://doi.org/10.1063/9.0000069