Results 81 to 90 of about 22,466 (253)
Prospects of FMCW-based frequency diverse array radar
The Journal of Engineering, 2019 The linear frequency modulated (LFM) frequency modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is investigated in detail. The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as
Ramazan Çetiner +3 more
doaj +1 more source
MilliSonic: Pushing the Limits of Acoustic Motion Tracking
, 2019 Recent years have seen interest in device tracking and localization using acoustic signals. State-of-the-art acoustic motion tracking systems however do not achieve millimeter accuracy and require large separation between microphones and speakers, and as
Gollakota, Shyamnath, Wang, Anran
core +1 more source
Illuminating Advances in Materials: Optical Physical Unclonable Functions for Security Applications
Advanced Optical Materials, Volume 13, Issue 29, October 13, 2025.This review highlights Optical Physical Unclonable Functions (OPUFs) as secure, light‐driven authentication tools. It surveys material platforms including optical fibers, low‐dimensional materials, luminophores, plasmonic nanoparticles and rare earth OPUFs systems.
Syeda Ramsha Ali +4 more
wiley +1 more source
Design Considerations for Integrated Radar Chirp Synthesizers
IEEE Access, 2019 Phase-locked loops (PLLs) effectively generate frequency chirps for frequency-modulated continuous-wave (FMCW) radar and are ideal for integrated circuit implementations.
Daniel Weyer +6 more
doaj +1 more source
Metasurface Doppler Cloak for Broadband Radar Stealth
Advanced Physics Research, Volume 4, Issue 10, October 2025.Suppressing the motion‐induced Doppler shift passes the target as part of the static clutter which is ignored by radars. Using a simple time‐modulation, frequency conversion is obtained from a metasurface‐based solution over a wide range. Referred to as a Doppler cloak, this work expands and validates such a varactor‐loaded prototype for broadband ...
Tanguy Lopez +3 more
wiley +1 more source
The Role of Millimeter-Waves in the Distance Measurement Accuracy of an FMCW Radar Sensor
Sensors, 2019 High-accuracy, short-range distance measurement is required in a variety of industrial applications e.g., positioning of robots in a fully automated production process, level measurement of liquids in small containers.
Akanksha Bhutani +5 more
doaj +1 more source
Space Vector‐Signal Generator Based on High‐Order Amplitude‐Phase Modulated Programmable Metasurface
Small Structures, Volume 6, Issue 10, October 2025.A high‐order amplitude‐phase modulated metasurface offers precise amplitude and phase control, enabling a spatial vector‐signal generator for efficient baseband and complex signal generation. This innovative approach enhances flexibility and dynamic adaptability in RF modulation, demonstrating significant potential for high‐speed wireless communication,
Zhen Jie Qi +7 more
wiley +1 more source
FMCW SAR Sparse Imaging Based on Approximated Observation: An Overview on Current Technologies
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020 Sparsity-driven synthetic aperture radar (SAR) imaging technique for frequency modulation continuous wave (FMCW) has already shown the superiority in terms of performance improvement in imaging and recovery from down-sampled data.
Hui Bi +5 more
doaj +1 more source
Backscatter Transponder Based on Frequency Selective Surface for FMCW Radar Applications [PDF]
, 2014 This paper describes an actively-controlled frequency selective surface (FSS) to implement a backscatter transponder. The FSS is composed by dipoles loaded with switching PIN diodes. The transponder exploits the change in the radar cross section (RCS) of
Girbau, D. +3 more
core +1 more source
Radar-on-Lidar: metric radar localization on prior lidar maps
, 2020 Radar and lidar, provided by two different range sensors, each has pros and cons of various perception tasks on mobile robots or autonomous driving. In this paper, a Monte Carlo system is used to localize the robot with a rotating radar sensor on 2D ...
Tang, Li +3 more
core +1 more source