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Far-field reflectometry for characterization of active antennas

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4 Author(s)
Huan-Shang Tsai ; Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA ; Kent, S.D. ; Lee, H. ; York, R.A.

Testing active antennas or polarimetric radar calibrators in the far field (plane wave excitation) is complicated by imperfect isolation between transmit and receive channels. We describe a far-field reflectometry setup which overcomes this problem. A large dynamic range is achieved by modulating the active element bias and using a quadrature receiver and lock-in detection scheme. A calibration method and a novel mixer phase-error correction scheme are described. The system is capable of full polarimetric characterization of active scatterers

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:43 ,  Issue: 4 )

Date of Publication:

Aug 1994

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