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Proceedings Paper

Terahertz-wave radars based on resonant-tunneling-diode oscillators
Author(s): Adrian Dobroiu; Safumi Suzuki; Masahiro Asada
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Paper Abstract

Several terahertz-wave radar techniques based on a resonant-tunneling-diode (RTD) oscillator are under investigation. First, an amplitude-modulated continuous-wave (AMCW) radar able to measure the absolute distance was achieved by demodulating the wave returning from the target and measuring its phase, either by determining the time delay with an oscilloscope, or by using an IQ demodulator to determine the sine and cosine of the phase. Our current record with this type of radar is a ranging error of 0.063 mm; however, it can only measure the distance up to a single reflecting surface. Second, a subcarrier frequency-modulated continuous-wave (FMCW) radar has been demonstrated to work and is expected to allow the simultaneous ranging of several targets. The ranging error for this radar was found to be 0.73 mm. Additionally, a radar technique based on the swept source optical coherence tomography (SS-OCT) principle is proposed. Terahertz-wave 2D imaging can be combined with these radar techniques to obtain a 3D imaging system.

Paper Details

Date Published: 6 September 2019
PDF: 7 pages
Proc. SPIE 11124, Terahertz Emitters, Receivers, and Applications X, 111240U (6 September 2019); doi: 10.1117/12.2526709
Show Author Affiliations
Adrian Dobroiu, Tokyo Institute of Technology (Japan)
Safumi Suzuki, Tokyo Institute of Technology (Japan)
Masahiro Asada, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 11124:
Terahertz Emitters, Receivers, and Applications X
Manijeh Razeghi; Alexei N. Baranov; Miriam S. Vitiello, Editor(s)

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