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Laboratory demonstration of electronic polarization basis rotation

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2 Author(s)
Gasiewski, A.J. ; Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Kunkee, D.B.

A hardware and software technique for rotation of the polarization basis of a dual orthogonal linearly polarized radiometer is discussed. The technique requires precise measurement of the two orthogonal-mode antenna temperatures along with cross-correlation of the two mode amplitudes (the first three Stokes parameters). An innovative polarized blackbody load was developed for accurate calibration of the cross-correlating channel. Using 90-GHz near-Brewster angle observations of a polarizing water surface, rotation of the antenna's polarization basis by a matrix transformation was performed. The experimental results demonstrate the viability of electronic polarization basis rotation (EPBR) and suggest practical calibration schemes for full-polarization radiometers. Applications of EBPR include mechanically scanned polarization-sensitive imaging radiometers.<>

Published in:

Microwave Symposium Digest, 1992., IEEE MTT-S International

Date of Conference:

1-5 June 1992