FMCW

Frequency modulated continuous wave (FMCW) radar is an approach able of measure distance between the target and the antenna. This method is well known method in the GHz domain and this now developped in the terahertz range for short range non destructive test.

Aeronautics composite material inspection with a terahertz time-domain spectroscopy system

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Terahertz research image associated with Terahertz waves for contactless control and imaging in aeronautics industry

An in-depth editorial guide to Aeronautics composite material inspection with a terahertz time-domain spectroscopy system, its scientific context, terahertz contribution, applications, and collaboration potential in Non-Destructive Testing.

Terahertz frequency modulated continuous wave imaging advanced data processing for art painting analysis

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Terahertz research image associated with Guided Reflectometry Imaging Unit Using Millimeter Wave FMCW Radars

An in-depth editorial guide to Terahertz frequency modulated continuous wave imaging advanced data processing for art painting analysis, its scientific context, terahertz contribution, applications, and collaboration potential in Art & Cultural Heritage.

Art Painting Diagnostic Before Restoration with Terahertz and Millimeter Waves

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Terahertz research image associated with TeraPulse Lx for terahertz imaging of painting on canvas

An in-depth editorial guide to Art Painting Diagnostic Before Restoration with Terahertz and Millimeter Waves, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.

Terahertz waves for contactless control and imaging in aeronautics industry

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Terahertz research image associated with Terahertz waves for contactless control and imaging in aeronautics industry

Terahertz technology is emerging as a powerful, contact‑free tool for the aeronautics sector, offering both rapid structural health monitoring and precise material characterization. The study demonstrates that frequency‑modulated continuous‑wave (FMCW) radars operating in the 100–300 GHz band can…

TeraPulse Lx for terahertz imaging of painting on canvas

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Terahertz research image associated with TeraPulse Lx for terahertz imaging of painting on canvas

An in-depth editorial guide to TeraPulse Lx for terahertz imaging of painting on canvas, its scientific context, terahertz contribution, applications, and collaboration potential in Art & Cultural Heritage.

An algorithm of unordered wavefront propagation in terahertz phase retrieval with dense multiplane data acquisition

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Research figure associated with An algorithm of unordered wavefront propagation in terahertz phase retrieval with dense multiplane data acquisition

An in-depth editorial guide to An algorithm of unordered wavefront propagation in terahertz phase retrieval with dense multiplane data acquisition, its scientific context, terahertz contribution, applications, and collaboration potential in Biomedical Imaging.

Terahertz Nondestructive Testing with Ultra-Wideband FMCW Radar

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Terahertz research image associated with Terahertz Nondestructive Testing with Ultra-Wideband FMCW Radar

The 150 GHz continuous‑wave radar, based on a homodyne eight‑harmonic mixing architecture, delivers non‑contact, high‑dynamic‑range imaging of a broad class of materials at sub‑millimetre depth resolution and up to 7.6 kHz frame rates. Achieving a 100 dB measurement dynamic range for few‑second…

Augmented Reality Terahertz (AR-THz) Sensing and Imaging with Frequency-Modulated Continuous-Wave Radar

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Terahertz research image associated with Augmented reality terahertz (AR-THz) sensing and imaging with frequency-modulated continuous-wave radar

The research introduces a handheld terahertz (THz) sensing platform that fuses a frequency-modulated continuous wave (FMCW) radar with a smartphone‑based augmented reality (AR) interface. The integration eliminates the need for heavy mechanical scanners, reducing system weight and cost while…

Feasibility of Using a 300 GHz Radar to Detect Fractures and Lithological Changes in Rocks

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Terahertz research image associated with Feasibility of Using a 300 GHz Radar to Detect Fractures and Lithological Changes in Rocks

The study demonstrates that a compact, frequency‑modulated continuous‑wave radar operating at 300 GHz can non‑destructively image rock interiors with unprecedented detail. By scanning a 121 cm² area in only fifteen minutes, the system resolves millimetre‑scale fractures and subtle lithological…

Guided Reflectometry Imaging Unit Using Millimeter Wave FMCW Radars

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Terahertz research image associated with Guided Reflectometry Imaging Unit Using Millimeter Wave FMCW Radars

The study demonstrates a new generation of terahertz‑frequency radar probes that combine a frequency‑modulated continuous‑wave (FMCW) transmitter with a thin‑wall hollow‑core dielectric waveguide. By guiding the millimetre‑wave signal directly inside a polymer pipe, the device eliminates the need…

Broadband THz emission of long pulses from photomixing process with optical chirped pulses

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Terahertz research image associated with Guided terahertz pulse reflectometry with double photoconductive antenna

The study introduces a novel photomixing technique that generates long terahertz (THz) pulses with a broad, linearly chirped spectrum by interfering two optical pulses of opposite chirp. By stretching each pulse to roughly 90 ps and applying opposite frequency sweeps, the beat frequency evolves…

SubTHz Fully-Metallic Geodesic Luneburg Lens Antenna

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Research figure associated with SubTHz Fully-Metallic Geodesic Luneburg Lens Antenna

Executive Summary A team of researchers from KTH Royal Institute of Technology, INSA Rennes, the University of Bordeaux, and ESA has developed and experimentally validated a fully metallic geodesic Luneburg lens antenna that operates in the sub‑terahertz (sub‑THz) frequency band between 128 and 132…

Feasibility of Using a 300 GHz Radar to Detect Fractures and Lithological Changes in Rocks

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FMCW radar rock non destructive testing

This article examines the possibility of using a high frequency radar (300 GHz) to detect fractures and lithological changes in rocks. This study, carried out in collaboration between Federico Sanjuan (University of Pau, France) and the IMS laboratory (University of Bordeaux), is in the context of the improvement of the methods of detection and quantification … Read more

Guided Reflectometry Imaging Unit using Millimeter Wave FMCW Radars

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Plastic wavguide for terahertz sensing in reflection

In this paper published in july 2020 in IEEE Transactions on Terahertz Science and Technology, we present a reflectometry sensing system associated with a frequency modulated continuous wave radar. Then, a solid immersion lens is added to the system to improve the resolution. Abstract of terahertz reflectometry setup Frequency Modulated Continuous Wave (FMCW) radar systems … Read more

Paris Air Show 2019

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As part of the Saphyr project, photonic and aeronautic prototypes from the Aquitaine region will be presented at the Paris Air show 2019. Visit our booth A120 Hall 4 to discuss terahertz waves applied to non-destructive testing. This project is in collaboration between the IMS laboratory (Laser & Terahertz Test Team) and R&D Vision.

Terahertz frequency modulated continuous wave imaging advanced data processing for art painting analysis

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In this paper, we focus on data processing applied to terahertz FMCW measurement of a painting. Investigated paintings FMCW radar processing The proposed approach consist to use longitudinal information of FMCW signal to adjust amplitude. This calibration process was tested on a stepped target and then on the investigated painting, giving a more homogeneous result, … Read more

Art Painting Diagnostic Before Restoration with Terahertz and Millimeter Waves

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Introduction Terahertz time domain imaging, FMCW and spectroscopy are useful tools for art restorer to inspect paintings and other cultural. Thanks to the different terahertz equipments present on the terahertz platform in Bordeaux, we have set up collaborations with art restorers and researchers working on the analysis of works of art with terahertz. This article presents … Read more