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

Chan Sam Park; Jiyun Jeon; Byungjoo Oh; Hee Young Chae; Kyeonghwan Park; Hungsun Son; Jae Joon Kim

doi:10.3390/s18113816

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

Sensors (Basel). 2018 Nov 7;18(11):3816. doi: 10.3390/s18113816.

Authors

Chan Sam Park¹, Jiyun Jeon², Byungjoo Oh³, Hee Young Chae⁴, Kyeonghwan Park⁵, Hungsun Son⁶, Jae Joon Kim⁷

Affiliations

¹ School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. chan4517@unist.ac.kr.
² School of Mechanical, Aerospace and Nuclear Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. jyjeon@unist.ac.kr.
³ School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. ohbj87@unist.ac.kr.
⁴ School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. laplume@unist.ac.kr.
⁵ School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. khpark@unist.ac.kr.
⁶ School of Mechanical, Aerospace and Nuclear Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. hson@unist.ac.kr.
⁷ School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. jaejoon@unist.ac.kr.

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.

Keywords: magnetic induction tomography; phase-band auto-tracking; phase-domain sigma–delta modulator; phase-locked loop; transceiver integrated circuit.