期刊
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
卷 70, 期 11, 页码 5259-5270出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2022.3195235
关键词
Distance measurement; frequency-modulated continuous wave (FMCW) radar; linear position sensor; millimeter wave (mroWave) radar; near-field effects; radar theory; refractive index; signal processing; ultrawideband (UWB) radar
资金
- German Research Foundation (DFG) [287022738-TRR 196]
- Federal Ministry of Education and Research of Germany (BMBF) [16ME0179]
This work presents a proof-of-concept for a linear-position sensor using millimeter-wave radar technology, which achieves environmental compensated and calibration-free distance measurements at medium range with micron accuracy and high sensitivity.
This work provides a proof-of-concept for a linear-position sensor using an ultrawideband (UWB) frequency-modulated 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 (mm Wave) 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 mu m 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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