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2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2021
We report on real-time distance measurement in the terahertz range using a resonant-tunneling-diode (RTD) oscillator by applying the frequency-modulated continuous-wave (FMCW) radar principle to a subcarrier of the terahertz wave. Compared with our previous report, the measurement time was reduced from above one minute to below 5 ms, an improvement of ...
Jia Ito +4 more
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We report on real-time distance measurement in the terahertz range using a resonant-tunneling-diode (RTD) oscillator by applying the frequency-modulated continuous-wave (FMCW) radar principle to a subcarrier of the terahertz wave. Compared with our previous report, the measurement time was reduced from above one minute to below 5 ms, an improvement of ...
Jia Ito +4 more
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Terahertz-wave radars based on resonant-tunneling-diode oscillators
Terahertz Emitters, Receivers, and Applications X, 2019Several 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 ...
Adrian Dobroiu +2 more
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2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Adrian Dobroiu, Safumi Suzuki
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Adrian Dobroiu, Safumi Suzuki
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Pancharatnam–Berry metasurface for terahertz wave radar cross section reduction*
Chinese Physics B, 2019Abstract The digital coding metasurfaces need several kinds of meta-particle structures to obtain corresponding electromagnetic wave responses and require time-consuming optimization. In this paper, we present train-symbol-shaped meta-particles with various orientations utilizing Pancharatnam–Berry (PB) phase to achieve 1-, 2-, and 3-bit
Shao-He Li, Jiu-Sheng Li
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Laser Physics, 2019
We propose a kind of coding metasurface of an 'M'-shaped metallic pattern coding particle, which can realize the flexible manipulation of terahertz waves and reduce radar cross sections effectively. In this paper, eight kinds of coding particles are obtained by rotating the 'M'-shaped pattern using the Pancharatnam–Berry phase theory.
Shaohe Li, Jiusheng Li
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We propose a kind of coding metasurface of an 'M'-shaped metallic pattern coding particle, which can realize the flexible manipulation of terahertz waves and reduce radar cross sections effectively. In this paper, eight kinds of coding particles are obtained by rotating the 'M'-shaped pattern using the Pancharatnam–Berry phase theory.
Shaohe Li, Jiusheng Li
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Waves in Random and Complex Media, 2019
In this paper, the propagation of terahertz (THz) band of electromagnetic wave in left-handed materials (LHM) is simulated by using finite-difference time-domain (FDTD) method.
Gen-Ming Lai +3 more
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In this paper, the propagation of terahertz (THz) band of electromagnetic wave in left-handed materials (LHM) is simulated by using finite-difference time-domain (FDTD) method.
Gen-Ming Lai +3 more
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Guang pu xue yu guang pu fen xi = Guang pu, 2018
Electromagnetic metasurface with many special electromagnetic properties can be utilized to manipulate electromagnetic wave propagation and reflection. If the metasurfaces were designed for coding, random, phase discontinuities, perfect absorber and so on，they can manipulate the scattering or the reflection of electromagnetic wave and achieve the ...
Xin, Yan +4 more
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Electromagnetic metasurface with many special electromagnetic properties can be utilized to manipulate electromagnetic wave propagation and reflection. If the metasurfaces were designed for coding, random, phase discontinuities, perfect absorber and so on，they can manipulate the scattering or the reflection of electromagnetic wave and achieve the ...
Xin, Yan +4 more
openaire +1 more source
Terahertz Nondestructive Testing with Ultra-Wideband FMCW Radar
Sensors, 2023Patrick Mounaix +2 more
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