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Sensors 2018, 18(11), 3816; https://doi.org/10.3390/s18113816

A Portable Phase-Domain Magnetic Induction Tomography Transceiver with Phase-Band Auto-Tracking and Frequency-Sweep Capabilities

1
School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
2
School of Mechanical, Aerospace and Nuclear Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea
*
Authors to whom correspondence should be addressed.
Received: 18 October 2018 / Revised: 4 November 2018 / Accepted: 5 November 2018 / Published: 7 November 2018
(This article belongs to the Section Physical Sensors)
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Abstract

This paper presents a portable magnetic induction tomography (MIT) transceiver integrated circuit to miniaturize conventional equipment-based MIT systems. The miniaturized MIT function is enabled through single-chip transceiver implementation. The proposed MIT transceiver utilizes a phase-locked loop (PLL) for frequency sweeping and a phase-domain sigma–delta modulator with phase-band auto-tracking for a full-range fine-phase resolution. The designed transceiver is fabricated and verified to achieve the measured signal to noise and distortion ratio (SNDR) of 101.7 dB. Its system-level prototype including in-house magnetic sensor coils is manufactured and functionally verified for four different material types. View Full-Text
Keywords: magnetic induction tomography; phase-domain sigma–delta modulator; phase-locked loop; transceiver integrated circuit; phase-band auto-tracking magnetic induction tomography; phase-domain sigma–delta modulator; phase-locked loop; transceiver integrated circuit; phase-band auto-tracking
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Park, C.S.; Jeon, J.; Oh, B.; Chae, H.Y.; Park, K.; Son, H.; Kim, J.J. A Portable Phase-Domain Magnetic Induction Tomography Transceiver with Phase-Band Auto-Tracking and Frequency-Sweep Capabilities. Sensors 2018, 18, 3816.

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