Millimeter-wave reflectometer

Roger Appleby; Michelle Leeks-Musselwhite

doi:10.1117/12.477466

29 July 2002 Millimeter-wave reflectometer

Roger Appleby, Michelle Leeks-Musselwhite

Proceedings Volume 4719, Infrared and Passive Millimeter-wave Imaging Systems: Design, Analysis, Modeling, and Testing; (2002) https://doi.org/10.1117/12.477466
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

This paper describes a reflectometer, which can operate at either 35 or 94 GHz. A broadband signal is produced by a modulated noise source in either vertical or horizontal polarization. After reflection by the sample under test a super-heterodyne receiver detects this signal. The noise source and the receiver are mounted on two opposed 0.5 m parabolic antennas. These antennas are supported on arms, which can be rotated by stepper motors under computer control. The computer also controls the data logging system, which consists of a lock-in amplifier and analogue to digital converter. This instrument allows reflectivity to be measured for incidence angles from 20 to 70 degree(s) down to a minimum of 0.05%, which is sufficient to measure diffuse reflection.

Citation Download Citation

Roger Appleby and Michelle Leeks-Musselwhite "Millimeter-wave reflectometer", Proc. SPIE 4719, Infrared and Passive Millimeter-wave Imaging Systems: Design, Analysis, Modeling, and Testing, (29 July 2002); https://doi.org/10.1117/12.477466

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