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Proceedings Paper

Unamplified direct detection W-band imaging array
Author(s): J. N. Schulman; J. J. Lynch; H. P. Moyer; J. H. Schaffner; R. L. Bowen; Y. Royter; M. Sokolich; R. D. Rajavel
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Paper Abstract

We are developing a passive W-band millimeter wave imaging array that operates without the use of RF low noise amplifiers. The work is supported by the DARPA MIATA program. Previously reported Phase I results were a noise equivalent temperature difference (NETD) of 4.8°K. The goal of Phase II, currently underway, is to decrease this to 2°K or less. There are two improvements that must be made to achieve the goal. The square law diode detector sensitivity and the RF bandwidth reaching the detector must be increased significantly. This paper mainly deals with the first issue, the effort to increase the sensitivity by decreasing the diode area and capacitance, using electron beam lithography. Brief mention will be made of the redesign of the antenna-to-diode transition that simulations indicate will provide a doubling of bandwidth from 30 to 60 GHz.

Paper Details

Date Published: 1 May 2007
PDF: 6 pages
Proc. SPIE 6548, Passive Millimeter-Wave Imaging Technology X, 65480F (1 May 2007); doi: 10.1117/12.723308
Show Author Affiliations
J. N. Schulman, HRL Labs., LLC (United States)
J. J. Lynch, HRL Labs., LLC (United States)
H. P. Moyer, HRL Labs., LLC (United States)
J. H. Schaffner, HRL Labs., LLC (United States)
R. L. Bowen, HRL Labs., LLC (United States)
Y. Royter, HRL Labs., LLC (United States)
M. Sokolich, HRL Labs., LLC (United States)
R. D. Rajavel, HRL Labs., LLC (United States)

Published in SPIE Proceedings Vol. 6548:
Passive Millimeter-Wave Imaging Technology X
Roger Appleby; David A. Wikner, Editor(s)

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