Results 11 to 20 of about 888,042 (144)
Experimental Verification of Dual-Mode X-band FMCW Harmonic Radar [PDF]
2024 IEEE Asia-Pacific Microwave Conference (APMC)Harmonic radars that use passive nonlinear tags as targets are disadvantaged by the low power of the return signal, which significantly reduces their maximum operating range. To address this limitation, a novel dual-mode X-band FMCW harmonic radar capable of receiving both harmonic and intermodulation signal returns was developed.
Graeme Woodward, Stephen M. Pawson
exaly +4 more sources
Metasurface Doppler Cloak for Broadband Radar Stealth
Advanced Physics ResearchConcealing an aircraft is a multi‐faceted endeavor, notably involving radio and infrared frequencies. In a radar stealth context, it often translates to the reduction of the radar cross‐section (RCS).
Tanguy Lopez +3 more
doaj +2 more sources
FMCW-based contactless heart rate monitoring [PDF]
Scientific ReportsHeart disease is a significant global health issue. Traditional methods for heart rate monitoring typically require close physical contact, which limits the continuity and convenience of monitoring. To achieve real-time, non-contact heartbeat monitoring,
Zhanjun Hao +5 more
doaj +2 more sources
A Coherent Dual-Band FMCW Photonic Radar Based on a Synchronized FMCW Optoelectronic Oscillator
IEEE AccessThis paper proposes and experimentally demonstrates a novel coherent radar architecture based on a synchronized frequency-modulated continuous-wave optoelectronic oscillator.
Youngseok Bae, Minji Hyun, Joonyong Park
doaj +2 more sources
A Review of Insect Monitoring Approaches with Special Reference to Radar Techniques
Sensors, 2021 Drastic declines in insect populations are a vital concern worldwide. Despite widespread insect monitoring, the significant gaps in the literature must be addressed. Future monitoring techniques must be systematic and global.
Alexey Noskov +2 more
doaj +1 more source
Intermediate frequency variation in long‐range FMCW radar for harmonics cancellation [PDF]
IET Radar, Sonar & Navigation, 2020 This study presents a technique for removing the inevitable harmonic distortions and intermodulation products that primary frequency‐modulated continuous wave (FMCW) radars inherently generate in the baseband. The required mixers and baseband amplifiers are non‐linear devices that introduce signal distortions, depending on the positions of targets in ...
Adrian Figueroa +2 more
openaire +1 more source
Non-Contact Heart Rate Monitoring Based on Millimeter Wave Radar
IEEE Access, 2022 Millimeter Wave(mmWave) radar has been widely used in vital sign monitoring with non-contact and privacy protection. To reduce the effect of random body motion, respiration, and its harmonics on heart rate estimation, the heart rate monitoring based on ...
Zongquan Ling +4 more
doaj +1 more source
Use of a portable topographic mapping millimetre wave radar at an active lava flow. [PDF]
, 2006 A ground-based millimetre wave radar, AVTIS (All-weather Volcano Topography Imaging Sensor), has been developed for topographic monitoring. The instrument is portable and capable of measurements over ranges up to ∼7 km through cloud and at night.
James, M R +9 more
core +5 more sources
Terahertz Nondestructive Testing with Ultra-Wideband FMCW Radar
Sensors, 2022 This paper presents the development, performance, integration, and implementation of a 150 GHz FMCW radar based on a homodyne harmonic mixing scheme for noncontact, nondestructive testing. This system offers high-dynamic-range measurement capabilities up
Barnabé Carré +5 more
doaj +1 more source
A 90-98 GHz CMOS Transmitter Frontend for Concurrent Phase-Coded FMCW Radar Applications
IEEE Journal of Microwaves, 2022 A 90-98 GHz transmitter frontend fabricated in TSMC 65-nm bulk CMOS, capable of concurrent radar-communications applications is presented. A transmitter is proposed that can be used for phase-coded frequency-modulated continuous wave (PC-FMCW) radar as ...
Tal Elazar, Eran Socher
doaj +1 more source