Design of a Matching Network for a High-Sensitivity Broadband Magnetic Resonance Sounding Coil Sensor

Sensors
Yang ZhangTingting Lin

Abstract

The magnetic resonance sounding (MRS) technique is a non-invasive geophysical method that can provide unique insights into the hydrological properties of groundwater. The Cu coil sensor is the preferred choice for detecting the weak MRS signal because of its high sensitivity, low fabrication complexity and low cost. The tuned configuration was traditionally used for the MRS coil sensor design because of its high sensitivity and narrowband filtering. However, its narrow bandwidth may distort the MRS signals. To address this issue, a non-tuned design exhibiting a broad bandwidth has emerged recently, however, the sensitivity decreases as the bandwidth increases. Moreover, the effect of the MRS applications is often seriously influenced by power harmonic noises in the developed areas, especially low-frequency harmonics, resulting in saturation of the coil sensor, regardless of the tuned or non-tuned configuration. To solve the two aforementioned problems, we propose a matching network consisting of an LC broadband filter in parallel with a matching capacitor and provide a design for a coil sensor with a matching network (CSMN). The theoretical parameter calculations and the equivalent schematic of the CSMN with noise sources are i...Continue Reading

References

May 27, 2004·Ground Water·Anatoly LegchenkoJean-Michel Vouillamoz
Jul 13, 2011·IEEE Transactions on Applied Superconductivity : a Publication of the IEEE Superconductivity Committee·Andrei N MatlashovCaroline J Wurden
Feb 8, 2014·Sensors·Alfonso GarcíaEnrique Tremps
Nov 29, 2014·The Review of Scientific Instruments·Tingting LinJing Zhao
Dec 3, 2015·The Review of Scientific Instruments·Tingting LinJing Zhao
May 26, 2017·Scientific Reports·Ruben Pellicer-GuridiViktor Vegh
Jul 3, 2017·The Review of Scientific Instruments·Jun LinTingting Lin

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Methods Mentioned

BETA
nuclear magnetic resonance

Software Mentioned

CSMN

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