Passive Millimeter-Wave Dual-Polarization Imagers

We have developed two passive millimeter-wave imagers for terrestrial remote sensing: one is an integrated imaging and spectroscopy system in the 146-154-GHz range with 16 channels of 500-MHz bandwidth each, and the other is a single-channel dual-polarized imaging radiometer in the 70-100-GHz range....

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Published inIEEE transactions on instrumentation and measurement Vol. 61; no. 7; pp. 2042 - 2050
Main Authors Shaolin Liao, Gopalsami, N., Elmer, T. W., Koehl, E. R., Heifetz, A., Avers, K., Dieckman, E., Raptis, A. C.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2012
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Bandwidth
Channels
Computer architecture
Grounds
Imaging
Instrumentation
Lenses
Mathematical analysis
Meteorology
millimeter-wave (mmW)
polarization
Radiative transfer
radiometer
Radiometry
Ray tracing
Vegetation
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Summary:We have developed two passive millimeter-wave imagers for terrestrial remote sensing: one is an integrated imaging and spectroscopy system in the 146-154-GHz range with 16 channels of 500-MHz bandwidth each, and the other is a single-channel dual-polarized imaging radiometer in the 70-100-GHz range. The imaging in both systems is implemented through translation of a 15-cm Gaussian dielectric imaging lens. We compared the outdoor images of objects such as car, vegetation, sky, and ground by both the systems under various weather conditions, including clear, cloudy, and rainy times. A ray-tracing simulation with radiative transfer equation was used to quantify the polarization diversity of the acquired images.
Bibliography:ObjectType-Article-2
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ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2012.2183032