A review of sensing technologies for non-destructive evaluation of structural composite materials

R Gupta, D Mitchell, J Blanche, S Harper… - Journal of Composites …, 2021 - mdpi.com
The growing demand and diversity in the application of industrial composites and the current
inability of present non-destructive evaluation (NDE) methods to perform detailed inspection …

A SiGe-based 240-GHz FMCW radar system for high-resolution measurements

S Thomas, C Bredendiek, N Pohl - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
In this paper, a fully integrated silicon-germanium (SiGe)-based compact high-resolution
frequency-modulated continuous-wave (FMCW) radar sensor working in a frequency range …

Frequency selective surface coded retroreflectors for chipless indoor localization tag landmarks

A Jiménez-Sáez, M Schüßler, M El-Absi… - IEEE Antennas and …, 2020 - ieeexplore.ieee.org
This letter presents the integration of frequency selective surfaces (FSSs) with retroreflectors
for the realization of chipless wireless indoor localization tag landmarks. As an example, the …

Scattering and roughness analysis of indoor materials at frequencies from 750 GHz to 1.1 THz

F Sheikh, Y Zantah, IB Mabrouk… - … on Antennas and …, 2021 - ieeexplore.ieee.org
The problem of wave propagation and scattering at terahertz (THz) frequencies has become
increasingly important, in particular for accurate modeling of future indoor wireless …

Calibrated and frequency traceable D-band FMCW radar for VNA-like S-parameter measurements

T Jaeschke, S Kueppers, N Pohl… - 2022 IEEE Radio and …, 2022 - ieeexplore.ieee.org
In this paper a D-band frequency modulated continuous wave (FMCW) radar system and a
signal processing chain for vector network analyzer (VNA)-like S-parameter measurements …

Virtual radar: Real-time millimeter-wave radar sensor simulation for perception-driven robotics

C Schöffmann, B Ubezio, C Böhm… - IEEE Robotics and …, 2021 - ieeexplore.ieee.org
This article presents ViRa 1 1 Available online: https://vira. aau. at/., a real-time open-source
millimeter-wave radar simulation framework for perception-driven robotic applications. ViRa …

Multilayer thickness measurements below the Rayleigh limit using FMCW millimeter and terahertz waves

NS Schreiner, W Sauer-Greff, R Urbansky… - Sensors, 2019 - mdpi.com
We present thickness measurements with millimeter and terahertz waves using frequency-
modulated continuous-wave (FMCW) sensors. In contrast to terahertz time-domain …

Coherent Off-Axis Terahertz Tomography with a Multi-Channel Array and f-theta Optics

KH May, S Mohammadzadeh, A Keil, G Von Freymann… - Sensors, 2024 - mdpi.com
Terahertz tomography is a promising method among non-destructive inspection techniques
to detect faults and defects in dielectric samples. Recently, image quality was improved …

Compensation of sensor movements in short-range FMCW synthetic aperture radar algorithms

J Schorlemer, C Schulz, N Pohl… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Radar imaging using the synthetic aperture radar (SAR) principle is a common method to
obtain information about eg, the surface of a target. However, most image formation …

A novel mini 0.95 MgTiO3-0.05 CaTiO3 ceramic Luneburg lens fabricated by vat-photopolymerization 3D printing

Y Wang, R Su, J Chen, W Wang, X Zhang, H Xu… - Ceramics …, 2024 - Elsevier
With 5G and millimeter-wave technologies evolving rapidly, the high communication
frequency leads to high integration and miniaturization of the Luneburg lens (LL). In this …