Title :
140-GHz Scatterometir System And Measurements Of Terrain
Author :
Ock, Thomas F Had ; Ulaby, Fawwaz T.
Author_Institution :
Radiation Laboratory, 3228 Electrical Engineering And Computer Science Building, University Of Michigan, Ann Arbor, Mi 48109-2122.
fDate :
7/1/1990 12:00:00 AM
Abstract :
The goal of the University of Michigan millimeter-wave radar program is to characterize terrain scattering at 35, 94, and 140 GHz. The 140-GHz channel of a truck-mounted scatterometer system has recently been added to give the full desired operating capability. Two injection-locked 45.33-GHz Gunn oscillators use triplers to supply the up. and down-converters. Full polarization capability is obtained through the use of rotatable quarter-wave plates. Real-time signal processing and data eduction takes place in an HP 8510A automatic network analyzer on the truck-mounted platform. Sample measurements of millimeter-wave radar backscattering from vegetation and snow are given.
Keywords :
Calibration; Electric variables measurement; Frequency conversion; Frequency measurement; Gunn devices; Injection-locked oscillators; Optical retarders; Polarization; Radar measurements; Receiving antennas;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.1990.572928
