&lt;title&gt;Passive millimeter-wave camera&lt;/title&gt;

Yujiri, L.; Agravante, Hiroshi H.; Biedenbender, M.; Dow, G.S.; Flannery, M. R.; Fornaca, S.; Hauss, B.; Johnson, Ronald L.; Kuroda, Roger T.; Jordan, Karen; Lee, Paul S.; Lo, Dennis; Quon, B. H.; Rowe, Arlen W.; Samec, Thomas K.; Shoucri, Merit; Yokoyama, Karen E.; Yun, John T.

doi:10.1117/12.277080

Cited by 28 publications

(13 citation statements)

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“…:; required a 17 Hz frame rate, an NEDT of 4 K and instantaneous field of view of 15H x 10V degrees. The camera 21 shown in Figure 3 used 89 GHz MMICs with a10 GHz bandwidth and used an 18 inch Rexolite TM lens and a dithering mirror inclined at 45 degrees to sample the imagery at the Nyquist limit. The focal plane consists of 1040 receiver channels with each consisting of a linearly tapered slot antenna and 4 GaAs MMIC amplifier chips using 0.1 μm pseudomorphic HEMT technology.…”

Section: Trw Cameramentioning

confidence: 99%

Millimeter wave imaging: a historical review

2017

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The SPIE Passive and Active Millimeter Wave Imaging conference has provided an annual focus and forum for practitioners in the field of millimeter wave imaging for the past two decades. To celebrate the conference's twentieth anniversary we present a historical review of the evolution of millimeter wave imaging over the past twenty years. Advances in device technology play a fundamental role in imaging capability whilst system architectures have also evolved. Imaging phenomenology continues to be a crucial topic underpinning the deployment of millimeter wave imaging in diverse applications such as security, remote sensing, non-destructive testing and synthetic vision.

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Section: Trw Cameramentioning

confidence: 99%

Millimeter wave imaging: a historical review

2017

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“…The last ten years have seen increasing interest in millimeterwave imaging systems, [1][2][3][4][5][6][7][8][9] generally operating around 94 GHz. These imaging systems have less spatial resolution than optical or infrared systems, as a consequence of the much longer wavelength; however, they have an advantage over optical and infrared sensors in their ability to see through clouds, fog, smoke, and clothing materials.…”

Section: Introductionmentioning

confidence: 99%

Design and testing of an active 190-GHz millimeter-wave imager

Timms

2010

J. Electron. Imaging

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The design and testing of an active 190-GHz imaging system is presented. The system features two beam-scanning antennas, one of which transmits a vertical fan beam, and the other which receives a horizontal fan beam. By correlating the transmitted and received signals, an output is obtained that is proportional to the millimeter-wave reflectivity at the intersection of the two fan beams. Beam scanning is obtained by rotating a small subreflector within each antenna, allowing rapid scanning. The system has an angular resolution of 0.3 deg, a field of view of 14 × 14 deg, and operates at a standoff distance of 5 m.

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“…Probably the most successful of these has been the passive camera developed and demonstrated by TRW for all-weather landing. 67,68 Below 100 GHz, it utilizes their GaAs pHEMT process to produce LNAs having < 3 dB noise figure up to approximately 100 GHz. It has also been developed for 140 GHz using InP-based MMIC technology.…”

Section: Applications and Examples Of Mm-wave Imagersmentioning

confidence: 99%

Fundamentals of Terrestrial Millimeter-Wave and THz Remote Sensing

Brown¹

2004

Selected Topics in Electronics and Systems

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Having long been the realm of molecular chemistry, astronomy, and plasma diagnostics, the upper millimeter-wave band (~100 to 300 GHz) and the THz region above it have recently become the subject of heightened activity in the engineering community because of exciting new technology (e.g., sub-picosecond optoelectronics) and promising new "terrestrial" applications (e.g., counter-terrorism and medical imaging). The most challenging of these applications are arguably those that demand remote sensing at a stand-off of roughly 10 m or more between the target and the sensor system. As in any other spectral region, remote sensing in the THz region brings up the complex issues of sensor modality and architecture, free-space electromagnetic effects and components, transmit and receive electronics, signal processing, and atmospheric propagation. Unlike other spectral regions, there is not much literature that addresses these issues from a conceptual or system-engineering viewpoint. So a key theme of this chapter is to review or derive the essential engineering concepts in a comprehensive fashion, starting with fundamental principles of electromagnetics, quantum mechanics, and signal processing, and building up to trade-off formulations using system-level metrics such as noiseequivalent power and receiver operating characteristics. A secondary theme is to elucidate aspects of the THz region and its incumbent technology that are unique, whether advantageous or disadvantageous, relative to other spectral regions. The end goal is to provide a useful tutorial for graduate students or practicing engineers considering the upper mm-wave or THz regions for system research or development.

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<title>Passive millimeter-wave camera</title>

Cited by 28 publications

References 0 publications

Millimeter wave imaging: a historical review

Millimeter wave imaging: a historical review

Design and testing of an active 190-GHz millimeter-wave imager

Fundamentals of Terrestrial Millimeter-Wave and THz Remote Sensing

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