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An Investigation of Antenna Characterization Techniques in Microwave Remote Sensing Calibrations

Published

Author(s)

Derek A. Houtz, Dazhen Gu, Dave K. Walker, James P. Randa

Abstract

We compare three methods of quantifying illumination efficiency (IE). The ratio IE describes the contribution of energy emitted from a blackbody target to the total energy measured at an antenna aperture in a free-space microwave calibration target radiometric measurement. Measurements are compared at three frequencies: 18 GHz, 22.5 GHz, and 26 GHz. An antenna pattern integration method is compared with a recently-developed target temperature fitting method. These two experimental approaches are also compared to a computational antenna pattern simulation. Results show that the simulation agrees with the experimental fitting method more closely at far field distances, whereas the antenna pattern integration and experimental fitting method agree at closer distances
Conference Dates
July 22-27, 2012
Conference Location
Munich
Conference Title
2012 IEEE International Geoscience and Remote Sensing Symposium

Keywords

Blackbody target, mcirowave radiometer, illuminatin efficiency, antenna pattern simulation

Citation

Houtz, D. , Gu, D. , Walker, D. and Randa, J. (2012), An Investigation of Antenna Characterization Techniques in Microwave Remote Sensing Calibrations, 2012 IEEE International Geoscience and Remote Sensing Symposium, Munich, -1, [online], https://doi.org/10.1109/IGARSS.2012.6350426 (Accessed May 25, 2024)

Issues

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Created July 22, 2012, Updated January 27, 2020