Ken B. Cooper
Jet Propulsion Laboratory
14 Papers
79 Citations
Ken B. Cooper is an academic researcher from Jet Propulsion Laboratory. The author has contributed to research in topics: Radar & Radar imaging. The author has an hindex of 7, co-authored 14 publications.
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Papers
Fast, High-Resolution Terahertz Radar Imaging at 25 Meters
Ken B. Cooper,Robert J. Dengler,Nuria Llombart,Ashit Talukder,Anand Panangadan,Chris Peay,Imran Mehdi,Peter H. Siegel +7 more
TL;DR: In this paper, the scanning speed and standoff range of an ultra-wide bandwidth terahertz (THz) imaging radar for person-borne concealed object detection were improved by rapidly deflecting a flat, light-weight subreflector in a confocal Gregorian optical geometry.
Radiometer-on-a-chip: a path toward super-compact submillimeter-wave imaging arrays
Imran Mehdi,Bertrand Thomas,Choonsup Lee,Goutam Chattopadhyay,Robert Lin,Erich Schlecht,A. Peralta,John Gill,Ken B. Cooper,Nuria Llombart,Peter H. Siegel +10 more
TL;DR: In this paper, a super-compact low-mass sub-millimeter-wave imaging array is proposed for the W-band power amplifier MMIC. And a path towards super compact array receivers in the 500-600 GHz range is described in detail.
Imaging, Doppler, and spectroscopic radars from 95 to 700 GHz
TL;DR: In this paper, a 340 GHz imaging radar was tested using power-efficient MMIC-based active multiplier sources into its front end for standoff security screening, achieving an 8.3 Hz frame.
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DDFS and ΣΔ Approaches for Fractional Frequency Synthesis in Terahertz Instruments
Adrian Tang,Yanghyo Kim,Theodore Reck,Goutam Chattopadhyay,Imran Mehdi,Brian J. Drouin,Ken B. Cooper,Nathaniel J. Livesey,Mau-Chung Frank Chang +8 more
TL;DR: Measurements suggest ΣΔ synthesis is more suitable than DDFS for THz fractional synthesizers due to the high-phase multiplication of spurs, and performance in terms of phase-noise, spurious components, and power consumption is suggested.
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Transceiver array development for submillimeter-wave imaging radars
Ken B. Cooper,T. Reck,Cecile Jung-Kubiak,Choonsup Lee,Jose V. Siles,Robert Lin,Alejandro Peralta,Emmanuel Decrossas,Erich Schlecht,Goutam Chattopadhyay,Imran Mehdi +10 more
TL;DR: In this article, a two-element array unit cell was designed using a layered architecture with three-dimensional waveguide routing for maximum scalability to multiple array elements and preliminary performance characterization has been accomplished in terms of transmit power, and conversion loss, and promising 3D radar images of concealed weapons have been acquired using the array.
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