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.

中文翻译：

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利用单根同轴电缆两端反射系数的分布式磁传感器

阐述了利用磁阻效应和时域反射法的分布式磁传感器的原理，并用同轴电缆同时检测了磁场的位置和强度。本文提出了一种使用正向和反向反射系数S ₁₁和S ₂₂的分布式磁传感器从一根电磁同轴电缆的两端开始。使用反射系数的方法具有新颖的功能，例如：（1）改善等效测量时间的信噪比，以及（2）通过抖动消除时间波动。可以确定，与示波器相比，矢量网络分析仪的反射波的SNR提高了21.3 dB。此外，可以通过合成来自两端的反射波来补偿信号波的衰减。结果，信号波受到沿电缆长度的衰减影响较小，并在180 mm的位置处改善了19.0 dB。