DocumentCode :
1549388
Title :
A 225 GHz polarimetric radar
Author :
Mead, James B. ; McIntosh, Robert E.
Author_Institution :
Microwave Remote Sensing Lab., Massachusetts Univ., Amherst, MA, USA
Volume :
38
Issue :
9
fYear :
1990
fDate :
9/1/1990 12:00:00 AM
Firstpage :
1252
Lastpage :
1258
Abstract :
An incoherent 225-GHz polarimetric radar capable of measuring the Mueller matrix of point and distributed targets is described. The transmitter employs an extended interaction oscillator that transmit 60-W pulses of 50- to 600-ns duration. Incoherent measurements of the Mueller matrix are achieved by transmitting four linearly independent polarizations and measuring the scattered wave using a dual-polarized receiver. A novel calibration technique that requires a single in-scene reflector is presented. Polarimetric measurements are presented of a dihedral corner reflector and foliage which are the first polarimetric measurements reported at this wavelength. The foliage measurements indicate a pronounced sensitivity of the polarimetric data to fine-scale surface structure
Keywords :
calibration; polarimetry; radar systems; 225 GHz; 50 to 600 ns; 60 W; Mueller matrix; calibration technique; dihedral corner reflector; distributed targets; dual-polarized receiver; extended interaction oscillator; fine-scale surface structure; foliage; in-scene reflector; incoherent radar; linearly independent polarizations; point targets; polarimetric radar; pulse transmission; scattered wave; transmitter; Calibration; Microwave measurements; Oscillators; Polarization; Radar measurements; Radar polarimetry; Radar scattering; Surface structures; Transmitters; Wavelength measurement;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/22.58651
Filename :
58651
Link To Document :
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