Dr. David M. Sheen Profile

Dr. David M. Sheen

Laboratory Fellow at Pacific Northwest National Lab

SPIE Involvement:

Conference Program Committee | Author

Publications (56)

Proceedings Article | 7 June 2024 Presentation + Paper

Rotational millimeter-wave shoe scanner using the discrete Fourier transform for backprojection-based image reconstruction

R. Trevor Clark, Stephanie McDaid, David Sheen

Proceedings Volume 13048, 130480W (2024) https://doi.org/10.1117/12.3013926

KEYWORDS: Voxels, Prototyping, Reconstruction algorithms, Windows, Body scanners, Fourier transforms, Scanners, Dielectrics, Antennas, Image restoration

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Proceedings Article | 7 June 2024 Presentation + Paper

Multistatic cylindrical fast backprojection 3D image reconstruction

David Sheen, R. Trevor Clark

Proceedings Volume 13048, 130480X (2024) https://doi.org/10.1117/12.3013952

KEYWORDS: Antennas, Reconstruction algorithms, Image restoration, Imaging systems, Voxels, Interpolation, Calibration, Imaging arrays, Algorithm development

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Proceedings Article | 3 June 2022 Presentation + Paper

Microwave imaging of a walking person using vertical linear arrays

David Sheen, R. Trevor Clark

Proceedings Volume 12111, 121110K (2022) https://doi.org/10.1117/12.2622806

KEYWORDS: Motion models, Imaging systems, Antennas, Radar, Millimeter wave imaging, 3D modeling, 3D image processing

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Proceedings Article | 12 April 2021 Presentation + Paper

Ultra-broadband voltage-controlled oscillator linearization for frequency modulated continuous wave MMW imaging systems

Jonathan Tedeschi, David Sheen, Stephanie McDaid

Proceedings Volume 11742, 117421B (2021) https://doi.org/10.1117/12.2591789

KEYWORDS: Oscillators, Radar, Modulation, Millimeter wave imaging, Imaging systems, Image resolution, Control systems, Antennas

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Proceedings Article | 12 April 2021 Presentation + Paper

Depth resolution evaluation for an active wideband millimeter-wave imaging system

David Sheen, R. Trevor Clark, Maurio Grando

Proceedings Volume 11745, 117450M (2021) https://doi.org/10.1117/12.2587201

KEYWORDS: Millimeter wave imaging, Image resolution, Imaging systems, Standards development, Reflection, Image quality standards, Microwave radiation, Thin films, Stereoscopy, Imaging technologies

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Proceedings Article | 12 April 2021 Presentation + Paper

Accurate surface estimation from high-resolution 3D microwave images

R. Trevor Clark, David Sheen

Proceedings Volume 11745, 117450O (2021) https://doi.org/10.1117/12.2586127

KEYWORDS: 3D image processing, Microwave radiation, Image analysis, Clouds, Millimeter wave imaging, Microwave imaging, Image restoration, Image registration

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Proceedings Article | 23 April 2020 Presentation + Paper

High-resolution 3D microwave imaging using an optically tracked linear array

R. Trevor Clark, David Sheen, Jonathan Tedeschi, A. Mark Jones, Thomas Hall

Proceedings Volume 11411, 114110E (2020) https://doi.org/10.1117/12.2560396

KEYWORDS: 3D image processing, Radar, Optical tracking, Antennas, Computer programming, Data acquisition, Image restoration, Algorithm development, Reconstruction algorithms, Image quality

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Proceedings Article | 23 April 2020 Presentation + Paper

Efficient image reconstruction method for a millimeter-wave shoe scanner

David Sheen, R. Trevor Clark, Jonathan Tedeschi, Jonathan McCall, Trenton Hartman, A. Mark Jones

Proceedings Volume 11411, 114110B (2020) https://doi.org/10.1117/12.2560368

KEYWORDS: Antennas, Scanners, Dielectrics, Image restoration, Imaging systems, Metals, Prototyping, Transceivers, Reconstruction algorithms, Detection and tracking algorithms

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Proceedings Article | 13 May 2019 Paper

High-resolution 3D microwave imaging of a moving target using optical motion capture

David Sheen, R. Trevor Clark, J. Tedeschi, A. Mark Jones, Thomas Hall

Proceedings Volume 10994, 109940D (2019) https://doi.org/10.1117/12.2519892

KEYWORDS: Imaging systems, 3D image processing, Antennas, Radar, Reconstruction algorithms, Radar imaging, Algorithm development

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Proceedings Article | 11 May 2018 Paper

Simulation of active cylindrical and planar millimeter-wave imaging systems

David Sheen, A. Mark Jones, Thomas Hall

Proceedings Volume 10634, 1063408 (2018) https://doi.org/10.1117/12.2309568

KEYWORDS: Antennas, Imaging systems, Polarization, Solid modeling, Computer simulations, Image resolution, Scanners, Image restoration, Millimeter wave imaging

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Proceedings Article | 30 April 2018 Paper

Convolutional neural network based side attack explosive hazard detection in three dimensional voxel radar

Blake Brockner, Charlie Veal, Joshua Dowdy, Derek Anderson, Kathryn Williams, Robert Luke, David Sheen

Proceedings Volume 10628, 106281H (2018) https://doi.org/10.1117/12.2304507

KEYWORDS: Fusion energy, Convolution, Explosives detection, 3D image processing, Network architectures, Neural networks, Convolutional neural networks, Explosives, Sensors, Radar

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Proceedings Article | 3 May 2017 Presentation + Paper

Target detection in high-resolution 3D radar imagery

A. Buck, J. Keller, M. Popescu, D. Sheen, R. Luke

Proceedings Volume 10182, 101821G (2017) https://doi.org/10.1117/12.2262633

KEYWORDS: Explosives, Image processing, Detection and tracking algorithms, Image filtering, Sensors, Algorithm development, Radar imaging, Imaging systems, Radar, Target detection, 3D image processing, 3D acquisition

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Proceedings Article | 3 May 2017 Presentation + Paper

Voxel-space radar signal processing for side attack explosive ballistic detection

Josh Dowdy, Blake Brockner, Derek Anderson, Kathryn Williams, Robert Luke, David Sheen

Proceedings Volume 10182, 101821H (2017) https://doi.org/10.1117/12.2262659

KEYWORDS: Target detection, Fusion energy, 3D acquisition, Explosives, Explosives detection, Radar signal processing, Filtering (signal processing), Radar, Sensors, Sensor fusion, Receivers

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Proceedings Article | 12 May 2016 Paper

Three-dimensional radar imaging techniques and systems for near-field applications

David Sheen, Thomas Hall, Douglas McMakin, A. Mark Jones, Jonathan Tedeschi

Proceedings Volume 9829, 98290V (2016) https://doi.org/10.1117/12.2229235

KEYWORDS: Radar imaging, 3D image processing, Imaging systems, Near field, Holography, Radar, Weapons, Antennas, Neodymium, Synthetic aperture radar

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Proceedings Article | 19 May 2015 Paper

Noise analysis for near-field 3D FM-CW radar imaging systems

David Sheen

Proceedings Volume 9462, 946206 (2015) https://doi.org/10.1117/12.2180032

KEYWORDS: Interference (communication), Oscillators, Imaging systems, Signal to noise ratio, Transceivers, Near field, Antennas, 3D image processing, Radar imaging, Radar

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Proceedings Article | 9 June 2014 Paper

Reconstruction techniques for sparse multistatic linear array microwave imaging

David Sheen, Thomas Hall

Proceedings Volume 9078, 90780I (2014) https://doi.org/10.1117/12.2053814

KEYWORDS: Antennas, Imaging systems, Reconstruction algorithms, 3D image processing, Imaging arrays, Image restoration, Transmitters, Near field, Receivers, Microwave imaging

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Proceedings Article | 27 September 2013 Paper

Fully polarimetric passive W-band millimeter wave imager for wide area search

Jonathan Tedeschi, Bruce Bernacki, Dave Sheen, Jim Kelly, Doug McMakin

Proceedings Volume 8873, 88730V (2013) https://doi.org/10.1117/12.2023390

KEYWORDS: Polarization, Radiometry, Polarimetry, Imaging systems, Receivers, Extremely high frequency, Reflectors, Feature extraction, Switching, Heterodyning

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Proceedings Article | 31 May 2013 Paper

Fully polarimetric differential intensity W-band imager

Bruce Bernacki, Jonathan Tedeschi, James Kelly, David Sheen, Thomas Hall, Patrick Valdez, Wayne Lechelt, Douglas McMakin

Proceedings Volume 8715, 87150G (2013) https://doi.org/10.1117/12.2015193

KEYWORDS: Imaging systems, Radiometry, Polarimetry, Dielectric polarization, Extremely high frequency, Radio optics, Heterodyning, Dielectrics, Antennas, Millimeter wave imaging

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Proceedings Article | 31 May 2013 Paper

Three-dimensional millimeter-wave imaging for concealed threat detection in shoes

Justin Fernandes, Jonathan Tedeschi, David Sheen, Douglas McMakin

Proceedings Volume 8715, 87150C (2013) https://doi.org/10.1117/12.2016612

KEYWORDS: Antennas, Imaging systems, Transceivers, 3D image processing, Scattering, Millimeter wave imaging, Image resolution, Foam, Metals, Reconstruction algorithms

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Proceedings Article | 31 May 2013 Paper

Wide-bandwidth, wide-beamwidth, high-resolution, millimeter-wave imaging for concealed weapon detection

David Sheen, Justin Fernandes, Jonathan Tedeschi, Douglas McMakin, A. Mark Jones, Wayne Lechelt, Ronald Severtsen

Proceedings Volume 8715, 871509 (2013) https://doi.org/10.1117/12.2016132

KEYWORDS: Antennas, Imaging systems, 3D image processing, Transceivers, 3D acquisition, Millimeter wave imaging, Image resolution, Weapons, Image restoration, Microwave radiation

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Proceedings Article | 9 May 2012 Paper

Wide-field-of-view millimeter-wave telescope design with ultra-low cross-polarization

Bruce Bernacki, James Kelly, David Sheen, Brian Hatchell, Patrick Valdez, Jonathan Tedeschi, Thomas Hall, Douglas McMakin

Proceedings Volume 8362, 836207 (2012) https://doi.org/10.1117/12.917773

KEYWORDS: Optical instrument design, Reflectors, Optical design, Polarization, Millimeter wave imaging, Telescopes, Mirrors, Imaging systems, Monochromatic aberrations, Telescope design

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Proceedings Article | 28 February 2012 Paper

Advanced millimeter-wave security portal imaging techniques

David Sheen, Bruce Bernacki, Douglas McMakin

Proceedings Volume 8259, 82590G (2012) https://doi.org/10.1117/12.910515

KEYWORDS: Imaging systems, Image restoration, Transceivers, 3D image reconstruction, 3D image processing, Image resolution, Polarization, Polarimetry, RF photonics, Firearms

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Proceedings Article | 28 February 2012 Paper

Passive fully polarimetric W-band millimeter-wave imaging

B. Bernacki, J. Kelly, D. Sheen, D. McMakin, J. Tedeschi, R. Harris, A. Mendoza, T. Hall, B. Hatchell, P. L. Valdez

Proceedings Volume 8259, 82590F (2012) https://doi.org/10.1117/12.909756

KEYWORDS: Extremely high frequency, Polarimetry, Imaging systems, Polarization, Image enhancement, Passive millimeter wave imaging, Radiometry, Millimeter wave imaging, Image analysis, Principal component analysis

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Proceedings Article | 26 May 2011 Paper

Phenomenology studies using a scanning fully polarimetric passive W-band millimeter-wave imager

B. Bernacki, J. Kelly, D. Sheen, D. McMakin, J. Tedeschi, T. Hall, B. Hatchell, P. L. Valdez

Proceedings Volume 8022, 80220C (2011) https://doi.org/10.1117/12.883545

KEYWORDS: Extremely high frequency, Polarization, Imaging systems, Polarimetry, Image analysis, Principal component analysis, Radiometry, Passive millimeter wave imaging, Reflectors, Wind energy

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Proceedings Article | 26 May 2011 Paper

Improved reconstruction and sensing techniques for personnel screening in three-dimensional cylindrical millimeter-wave portal scanning

Justin Fernandes, Carey Rappaport, David Sheen

Proceedings Volume 8022, 802205 (2011) https://doi.org/10.1117/12.887612

KEYWORDS: Imaging systems, Millimeter wave imaging, Sensors, Sensing systems, Algorithm development, Metals, 3D image processing, Reconstruction algorithms, Radar imaging, Transceivers

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Proceedings Article | 26 May 2011 Paper

Calibration, reconstruction, and rendering of cylindrical millimeter-wave image data

David Sheen, Thomas Hall

Proceedings Volume 8022, 80220H (2011) https://doi.org/10.1117/12.887922

KEYWORDS: 3D image processing, 3D image reconstruction, Imaging systems, 3D acquisition, Calibration, Image segmentation, Image restoration, Transceivers, Reconstruction algorithms, Image resolution

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Proceedings Article | 27 April 2010 Paper

Standoff concealed weapon detection using a 350-GHz radar imaging system

David Sheen, Thomas Hall, Ronald Severtsen, Douglas McMakin, Brian Hatchell, Patrick Valdez

Proceedings Volume 7670, 767008 (2010) https://doi.org/10.1117/12.852788

KEYWORDS: Imaging systems, Standoff detection, Transceivers, Mirrors, Weapons, 3D image processing, Reflectors, Prototyping, Scanners, Explosives

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Proceedings Article | 30 April 2009 Paper

Active wideband 350GHz imaging system for concealed-weapon detection

David Sheen, Thomas Hall, Ronald Severtsen, Douglas McMakin, Brian Hatchell, Patrick L. Valdez

Proceedings Volume 7309, 73090I (2009) https://doi.org/10.1117/12.817927

KEYWORDS: Imaging systems, Standoff detection, Transceivers, Terahertz radiation, Scanners, Reflectors, Prototyping, 3D image processing, Image resolution, Microwave radiation

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Proceedings Article | 30 April 2009 Paper

Dual-surface dielectric depth detector for holographic millimeter-wave security scanners

Douglas McMakin, Paul Keller, David Sheen, Thomas Hall

Proceedings Volume 7309, 73090G (2009) https://doi.org/10.1117/12.817882

KEYWORDS: Dielectrics, 3D image processing, Sensors, 3D image reconstruction, Image segmentation, 3D acquisition, Holography, Scanners, Detection and tracking algorithms, Image restoration

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Proceedings Article | 22 April 2008 Paper

Active imaging at 350 GHz for security applications

David Sheen, Douglas McMakin, Jeffrey Barber, Thomas Hall, Ronald Severtsen

Proceedings Volume 6948, 69480M (2008) https://doi.org/10.1117/12.778011

KEYWORDS: Imaging systems, Reflectors, Reflection, Firearms, Holography, Standoff detection, Transceivers, Weapons, Image resolution, Wavefront reconstruction

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Proceedings Article | 18 April 2008 Paper

Wideband fractal antennas for holographic imaging and rectenna applications

Kyle Bunch, Douglas McMakin, David Sheen

Proceedings Volume 6948, 69480B (2008) https://doi.org/10.1117/12.778265

KEYWORDS: Antennas, Fractal analysis, Holography, Radar, 3D image reconstruction, 3D image processing, Microwave radiation, Weapons, Nonlinear optics, Astatine

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Proceedings Article | 16 April 2008 Paper

Holographic radar imaging privacy techniques utilizing dual-frequency implementation

Douglas McMakin, Thomas Hall, David Sheen

Proceedings Volume 6943, 69430P (2008) https://doi.org/10.1117/12.777412

KEYWORDS: Holography, Skin, Radar imaging, Reflectivity, Ku band, Liquids, Telecommunications, Metals, Surveillance, Transceivers

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Proceedings Article | 4 May 2007 Paper

Biometric identification using holographic radar imaging techniques

Douglas McMakin, David Sheen, Thomas Hall, Mike Kennedy, Harlen Foote

Proceedings Volume 6538, 65380C (2007) https://doi.org/10.1117/12.729636

KEYWORDS: Holography, Biometrics, Radar, Radar imaging, 3D scanning, 3D metrology, Imaging systems, Scanners, 3D image processing, Holograms

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Proceedings Article | 1 May 2007 Paper

Speckle in active millimeter-wave and terahertz imaging and spectroscopy

David Sheen, Douglas McMakin, Thomas Hall

Proceedings Volume 6548, 654809 (2007) https://doi.org/10.1117/12.721323

KEYWORDS: Speckle, Reflection, Millimeter wave imaging, Explosives, Terahertz spectroscopy, Imaging systems, Transceivers, Holography, Spectroscopy, Image restoration

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Proceedings Article | 25 October 2006 Paper

Relative infrared (IR) and terahertz (THz) signatures of common explosives

S. Sharpe, T. Johnson, D. Sheen, D. Atkinson

Proceedings Volume 6378, 63780A (2006) https://doi.org/10.1117/12.686432

KEYWORDS: Terahertz radiation, Explosives, Infrared radiation, Infrared signatures, Spectroscopy, Mid-IR, Infrared spectroscopy, FT-IR spectroscopy, Bolometers, Infrared sensors

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Proceedings Article | 10 May 2006 Paper

Extremely high-frequency holographic radar imaging of personnel and mail

Douglas McMakin, David Sheen, Jeffery Griffin, Wayne Lechelt

Proceedings Volume 6201, 62011W (2006) https://doi.org/10.1117/12.668509

KEYWORDS: Holography, Radar imaging, Reflection, Imaging systems, Radar, Surveillance, Transceivers, Antennas, Detection and tracking algorithms

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Proceedings Article | 5 May 2006 Paper

Cylindrical millimeter-wave imaging technique and applications

David Sheen, Douglas McMakin, Thomas Hall

Proceedings Volume 6211, 62110A (2006) https://doi.org/10.1117/12.668572

KEYWORDS: Image restoration, Millimeter wave imaging, 3D image processing, Imaging systems, Weapons, Convolution, Reconstruction algorithms, Image segmentation, Specular reflections, 3D acquisition

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Proceedings Article | 20 May 2005 Paper

Personnel and mail screening with millimeter waves

Douglas McMakin, David Sheen, Jeffery Griffin, Nancy Valentine, Wayne Lechelt

Proceedings Volume 5778, (2005) https://doi.org/10.1117/12.606860

KEYWORDS: Holography, Biological detection systems, Glasses, Extremely high frequency, Dielectrics, Surveillance, Radar, 3D image processing, Algorithm development, Computing systems

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Proceedings Article | 19 May 2005 Paper

Circularly polarized millimeter-wave imaging for personnel screening

David Sheen, Douglas McMakin, Wayne Lechelt, Jeffrey Griffin

Proceedings Volume 5789, (2005) https://doi.org/10.1117/12.606825

KEYWORDS: Imaging systems, Polarization, Antennas, Transceivers, Millimeter wave imaging, Weapons, Polarimetry, Algorithm development, Scanners, Reconstruction algorithms

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Proceedings Article | 23 September 2003 Paper

Impact of background and atmospheric variability on infrared hyperspectral chemical detection sensitivity

David Sheen, Neal Gallagher, Steven Sharpe, Kevin Anderson, John Schultz

Proceedings Volume 5093, (2003) https://doi.org/10.1117/12.488931

KEYWORDS: Atmospheric modeling, Chemical analysis, Chemical detection, Atmospheric sensing, Atmospheric physics, Gases, Infrared radiation, Hyperspectral imaging, Instrument modeling, Infrared imaging

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Proceedings Article | 23 September 2003 Paper

Estimation of trace vapor concentration pathlength in plumes for remote sensing applications from hyperspectral images

Neal Gallagher, David Sheen, Jeremy Shaver, Barry Wise, John Shultz

Proceedings Volume 5093, (2003) https://doi.org/10.1117/12.490164

KEYWORDS: Hyperspectral imaging, Error analysis, Principal component analysis, Algorithm development, Remote sensing, Signal analyzers, Temperature metrology, Clouds, Image analysis, Absorbance

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Proceedings Article | 16 July 2003 Paper

Millimeter-wave imaging for concealed weapon detection

Douglas McMakin, David Sheen, Thomas Hall

Proceedings Volume 5048, (2003) https://doi.org/10.1117/12.484704

KEYWORDS: Holography, Scanners, Digital signal processing, Transceivers, Antennas, Weapons, Ku band, Imaging systems, Algorithm development, Switches

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Proceedings Article | 1 July 2003 Open Access

Quantum cascade transmitters for ultrasensitive chemical agent and explosives detection

John Schultz, Matthew Taubman, Warren Harper, Richard Williams, Tanya Myers, Bret Cannon, David Sheen, Norman Anheier, Paul Allen, S. Sundaram, Bradley Johnson, Pamela Aker, Ming Wu, Erwin Lau

Proceedings Volume 4999, (2003) https://doi.org/10.1117/12.485542

KEYWORDS: Quantum cascade lasers, Modulation, Frequency modulation, Absorption, Sensors, Fermium, Signal detection, Optical resonators, Transmitters, Waveguides

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Proceedings Article | 20 July 2000 Paper

Combined illumination cylindrical millimeter-wave imaging technique for concealed weapon detection

David Sheen, Douglas McMakin, Thomas Hall

Proceedings Volume 4032, (2000) https://doi.org/10.1117/12.391820

KEYWORDS: 3D image processing, Imaging systems, 3D acquisition, Image restoration, 3D image reconstruction, Millimeter wave imaging, Weapons, Image segmentation, Surveillance, Reconstruction algorithms

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Proceedings Article | 30 March 2000 Paper

Privacy algorithm for airport passenger screening portal

Paul Keller, Douglas McMakin, David Sheen, A. McKinnon, Jay Summet

Proceedings Volume 4055, (2000) https://doi.org/10.1117/12.380602

KEYWORDS: Image segmentation, Speckle, Imaging systems, Detection and tracking algorithms, Holography, Sensors, Explosives, Image processing algorithms and systems, Neural networks, Ku band

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Proceedings Article | 28 December 1998 Paper

Cylindrical holographic radar camera

Douglas McMakin, David Sheen, Thomas Hall, Ronald Severtsen

Proceedings Volume 3575, (1998) https://doi.org/10.1117/12.334976

KEYWORDS: Holography, Computing systems, Scanners, Cameras, Radar, Surveillance, Digital signal processing, Imaging systems, Waveguides, 3D image reconstruction

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Proceedings Article | 1 March 1998 Paper

Cylindrical millimeter-wave imaging technique for concealed weapon detection

David Sheen, Douglas McMakin, Thomas Hall

Proceedings Volume 3240, (1998) https://doi.org/10.1117/12.300061

KEYWORDS: Weapons, Millimeter wave imaging, Reflectivity, Computing systems, Antennas, Image resolution, Inspection, Video, 3D image processing, Image analysis

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Proceedings Article | 14 February 1997 Paper

Comparison of active millimeter-wave and acoustic imaging for weapon detection

David Sheen, H. Collins, R. Parks Gribble, Douglas McMakin

Proceedings Volume 2935, (1997) https://doi.org/10.1117/12.266792

KEYWORDS: Imaging systems, Acoustics, Millimeter wave imaging, Weapons, Image resolution, Holography, X-ray imaging, Ultrasonics, 3D image reconstruction, Transceivers

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Proceedings Article | 28 January 1997 Paper

Initial test and evaluation of the millimeter-wave holographic surveillance system

Douglas McMakin, David Sheen, Anne Schur, Wyllona Harris, Gregory Piepel

Proceedings Volume 2932, (1997) https://doi.org/10.1117/12.265379

KEYWORDS: Video, Video surveillance, Ka band, Ku band, Holography, Surveillance systems, Weapons, Explosives, Image resolution, Computer simulations

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Proceedings Article | 14 June 1996 Paper

Concealed explosive detection on personnel using a wideband holographic millimeter-wave imaging system

David Sheen, Douglas McMakin, H. Collins, Thomas Hall, Ronald Severtsen

Proceedings Volume 2755, (1996) https://doi.org/10.1117/12.243191

KEYWORDS: Imaging systems, Explosives, Millimeter wave imaging, Reconstruction algorithms, Weapons, Holography, 3D image processing, Explosives detection, Firearms, Algorithm development

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Proceedings Article | 15 September 1995 Paper

Wideband millimeter-wave holographic weapons surveillance systems

Douglas McMakin, David Sheen, H. Collins, Thomas Hall, Ronald Severtsen

Proceedings Volume 2511, (1995) https://doi.org/10.1117/12.219585

KEYWORDS: Holography, Imaging systems, Weapons, Extremely high frequency, Transceivers, Antennas, 3D image processing, Surveillance systems, Ka band, Ku band

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Proceedings Article | 15 September 1995 Paper

Circular scanned millimeter-wave imaging system for weapon detection

David Sheen, Douglas McMakin, H. Collins

Proceedings Volume 2511, (1995) https://doi.org/10.1117/12.219584

KEYWORDS: Imaging systems, Image segmentation, Transceivers, Weapons, Scanners, Metals, Millimeter wave imaging, Reconstruction algorithms, Distortion, Image resolution

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Proceedings Article | 28 March 1994 Paper

Weapon detection using a wideband millimeter-wave linear array imaging technique

David Sheen, Douglas McMakin, H. Collins, Thomas Hall

Proceedings Volume 2092, (1994) https://doi.org/10.1117/12.171271

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Proceedings Article | 28 March 1994 Paper

Millimeter-wave high-resolution holographic surveillance system

Douglas McMakin, David Sheen, H. Collins, Thomas Hall, Russell Smith

Proceedings Volume 2092, (1994) https://doi.org/10.1117/12.171270

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Proceedings Article | 28 May 1993 Paper

Ultrawideband radar clutter measurements and analysis

Michael Tuley, David Sheen, H. Collins, Earl Sager, A. Schultheis

Proceedings Volume 1875, (1993) https://doi.org/10.1117/12.145521

KEYWORDS: Radar, Antennas, Polarization, Calibration, Data processing, UWB radar, Receivers, L band, Roads, Data acquisition

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Proceedings Article | 1 April 1993 Paper

Near-field millimeter-wave imaging for weapons detection

David Sheen, Douglas McMakin, H. Collins, Thomas Hall

Proceedings Volume 1824, (1993) https://doi.org/10.1117/12.142900

KEYWORDS: Holography, Imaging systems, Metals, Weapons, Reconstruction algorithms, Millimeter wave imaging, Image resolution, Extremely high frequency, Antennas, 3D image reconstruction

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