Submillimeter-Wave Radar: Solid-State System Design and Applications

Cooper, Ken B.; Chattopadhyay, Goutam

doi:10.1109/mmm.2014.2356092

Cited by 87 publications

(39 citation statements)

References 40 publications

(47 reference statements)

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“…Most submillimetre wave radars make use of solid-state frequency multiplier chains [3,4,5,6,7], exploiting both MMIC and Schottky diode technologies, to generate transmit powers which are typically in the milliwatt class. When combined with sensitive heterodyne or homodyne receivers, these radars can achieve high dynamic ranges.…”

Section: Overview Of Submillimetre Wave Radarmentioning

confidence: 99%

“…However, they are not without drawbacks and there is an ongoing requirement to improve detection performance and increase throughput. For long-range stand-off screening, at ranges of many to tens of metres, operation at shorter submillimetre wavelengths is required to achieve the necessary diffraction limited resolution with a practically sized antenna [3].…”

Section: Introductionmentioning

confidence: 99%

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Submillimetre wave 3D imaging radar for security applications

Robertson¹,

Macfarlane²,

Cassidy³

et al. 2016

IET Colloquium on Millimetre-Wave and Terahertz Engineering [Amp ] Technology 2016

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There is ongoing worldwide interest in finding solutions to enhance the security of civilians at airports, borders and high risk public areas in ways which are safe, ethical and streamlined. One promising approach is to use submillimetre wave 3D imaging radar to detect concealed threats as it offers the advantages of high volumetric resolution (~1 cm3) with practically sized antennas (<0.5 m) such that even quite small objects can be resolved through clothing. The Millimetre Wave Group at the University of St Andrews has been developing submillimetre wave 3D imaging radars for security applications since 2007. A significant goal is to achieve near real-time frame rates of at least 10 Hz, to cope with dynamic scenes, over wide fields of view at short range with high pixel counts. We review the radar systems we have developed at 340 and 220 GHz and the underpinning technologies which we have employed to realise these goals.

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Section: Overview Of Submillimetre Wave Radarmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Submillimetre wave 3D imaging radar for security applications

Robertson¹,

Macfarlane²,

Cassidy³

et al. 2016

IET Colloquium on Millimetre-Wave and Terahertz Engineering [Amp ] Technology 2016

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show abstract

“…Therefore, a number of THz stand-off imaging systems have been developed by several research groups. These are either active systems, relying on artificial THz illumination with a narrow-band THz source [4] or passive systems, which are in some sense the THz analogue to infrared cameras since these systems detect the natural THz radiation emitted or reflected from a person or object [5]. Both imaging approaches have a low number of detectors -typically one for active imagers and up to about 100 for passive imagers.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Dynamic Aperture Imaging at Standoff Distances Using a Compressed Sensing Protocol

Augustin¹,

Jung²,

Frohmann³

et al. 2019

IEEE Trans. THz Sci. Technol.

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In this text, results of a 0.35 terahertz (THz) dynamic aperture imaging approach are presented. The experiments use an optical modulation approach and a single pixel detector at a stand-off imaging distance of ≈1 m. The optical modulation creates dynamic apertures of 5 cm diameter with ≈2000 individually controllable elements. An optical modulation approach is used here for the first time at a large far-field distance, for the investigation of various test targets in a fieldof-view of 8 x 8 cm. The results highlight the versatility of this modulation technique and show that this imaging paradigm is applicable even at large far-field distances. It proves the feasibility of this imaging approach for potential applications like stand-off security imaging or far field THz microscopy.

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“…Applications for radars at these frequencies are very diverse and include security screening [1], material inspection [2], helicopter powerline detection and brownout collision avoidance [3], [4], and atmospheric sensing [5], [6]. The successful realisation of sub/millimetre wave radars depends on the availability of enabling technology.…”

Section: Introductionmentioning

confidence: 99%

Enabling Technologies for High Performance Millimetre and Sub-millimetre Wave Radar

Robertson

2018

2018 19th International Radar Symposium (IRS)

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Submillimeter-Wave Radar: Solid-State System Design and Applications

Cited by 87 publications

References 40 publications

Submillimetre wave 3D imaging radar for security applications

Submillimetre wave 3D imaging radar for security applications

Terahertz Dynamic Aperture Imaging at Standoff Distances Using a Compressed Sensing Protocol

Enabling Technologies for High Performance Millimetre and Sub-millimetre Wave Radar

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