Micrometer-Accuracy Distance Measurement using 122 GHz LTCC Radar System-in-Package

Bhutani, Akanksha; Pauli, Mario; Latzko, Thomas; Göttel, Benjamin; Gehringer, Michael; Zwick, Thomas

doi:10.1109/apmc46564.2019.9038836

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Thus the propagation speed of the EM waves is assumed to be constant, for example, the speed of light in vacuum. This even applies to applications, where the authors are claiming very high accuracy [2]- [10] since the measuring range, there are just millimeters to centimeters. However, if the measuring range exceeds the scale of multiple meters, errors of up to several hundred parts per million (ppm) become significant.…”

Section: Free-space Pathmentioning

confidence: 99%

“…Table I reveals that most of the work is related to short-range metrology [2]- [11], which is in the range of millimeters to centimeters. These works primarily focus on hardware design [3]- [6], [8], [10]- [13], or just on precise parameter estimation [2]. However, distance measurement at medium range still raises questions about the free-space path, which is Lukas Piotrowsky and Nils Pohl are with the Institute of Integrated Systems, Ruhr University Bochum, 44801 Bochum, Germany (e-mail: lukas.piotrowsky@rub.de).…”

Section: Introductionmentioning

confidence: 99%

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Distance Measurement Using mmWave Radar: Micron Accuracy at Medium Range

Piotrowsky

Kueppers²,

Jaeschke³

et al. 2022

IEEE Trans. Microwave Theory Techn.

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This work provides a proof-of-concept for a linear-position sensor using an ultrawideband (UWB) frequencymodulated continuous wave (FMCW) radar system operating at 126-182 GHz. It is the first work to show environmental compensated and calibration-free distance measurements with micron accuracy at medium range using millimeter-wave (mmWave) radar technology. We addressed hardware imperfections, parameter estimation, and the free-space path, i.e., refractive index and near-field effects. The proposed signal processing chain is robust to interference and of low computational cost. Experiments reveal a systematic error of ±1 µm over 4.8 m (0.8-5.6 m), and a random error at a minimum of 30 nm, providing very high sensitivity.

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Section: Free-space Pathmentioning

confidence: 99%