Millimeter-wave interferometric radiometry for the detection and geolocation of low-power signals

David J. Dowgiallo; Elizabeth M. Twarog; Steve Rauen; Wendy M. Peters; T. Joseph Lazio; Norman R. McGlothlin; Joseph F. Helmboldt; Peter W. Gaiser

doi:10.1117/12.883503

26 May 2011 Millimeter-wave interferometric radiometry for the detection and geolocation of low-power signals

David J. Dowgiallo, Elizabeth M. Twarog, Steve Rauen, Wendy M. Peters, T. Joseph Lazio, Norman R. McGlothlin, Joseph F. Helmboldt, Peter W. Gaiser

Author Affiliations +

Proceedings Volume 8022, Passive Millimeter-Wave Imaging Technology XIV; 802202 (2011) https://doi.org/10.1117/12.883503
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Millimeter wave detection and imaging is becoming increasingly important with the proliferation of hostile, mobile millimeter wave threats from both weapons systems and communication links. Improved force protection, surveillance, and targeting will rely increasingly on the interception, detection, geo-sorting, and the identification of sources, such as point-to point communication systems, missile seekers, precision guided munitions, and fire control radar systems. This paper describes the Naval Research Laboratory's (NRL) demonstration broadband passive millimeter wave (mmW) interferometric imaging system. This Ka-band system will provide a capability for meter-precision geolocation for imaged objects. The interferometer uses a distributed array of 12 antenna elements to synthesize a large aperture. Each antenna is packaged into an individual receiver, from which a baseband signal is recorded. The correlator is software-based, utilizing signal processing techniques for visibilities, and image formation via beamforming methods. This paper presents first results from an interferometer flight campaign.

Citation Download Citation

David J. Dowgiallo, Elizabeth M. Twarog, Steve Rauen, Wendy M. Peters, T. Joseph Lazio, Norman R. McGlothlin, Joseph F. Helmboldt, and Peter W. Gaiser "Millimeter-wave interferometric radiometry for the detection and geolocation of low-power signals", Proc. SPIE 8022, Passive Millimeter-Wave Imaging Technology XIV, 802202 (26 May 2011); https://doi.org/10.1117/12.883503

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KEYWORDS

Receivers

Antennas

Interferometry

Calibration

Interferometers

Signal detection

Extremely high frequency

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