Title :
A millimeterwave network analyzer based scatterometer
Author :
Ulaby, Fawwaz T. ; Haddock, Thomas F. ; East, Jack R. ; Whitt, Micel W.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
1/1/1988 12:00:00 AM
Abstract :
The Millimeterwave Polarimeter (MMP) is a network-analyzer-based scatterometer and reflectometer system that has been developed to characterize radar clutter at 35, 94, and 140 GHz. A Hewlett-Packard 8510A network analyzer is used in the MMP system as a signal conditioner and processor to facilitate real-time data reduction, to reduce the short time-delay leakage noise inherent in traditional FM/CW radar, and to further enhance the signal-to-noise ratio of the system through signal processing techniques. Operation of the system at millimeter wavelengths is achieved with upconversion and harmonic downconversion. The use of harmonic downconverters permits low-frequency signal connections between components of the system and allows easy reconfiguration in either scatterometer, bistatic, or reflection/transmission modes
Keywords :
microwave measurement; network analysers; radar clutter; radar equipment; radar measurement; 140 GHz; 35 GHz; 94 GHz; EHF; Hewlett-Packard 8510A; MMP; Millimeterwave Polarimeter; harmonic downconversion; millimeterwave network analyzer; mm wavelengths; radar clutter; real-time data reduction; reflectometer; remote sensing; scatterometer; short time-delay leakage noise; signal processing techniques; upconversion; Clutter; Low-frequency noise; Millimeter wave technology; Noise reduction; Radar measurements; Radar signal processing; Real time systems; Signal analysis; Signal processing; Signal to noise ratio;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
