Abstract
A styrofoam layer is introduced to the cryogenic calibration load for microwave radiometers in order to keep the antenna at ambient temperature while calibrating. Obviously the insulation layer has nonuniform temperature profile. A novel approach based on the transmission-line theory is presented to calculate the emission from the load. According to the sample calculation through this new approach, the contribution of the insulation layer to the load radiation can not be neglected.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F. T. Ulaby, R. K. Moore, A. K. Fung, Microwave Remote Sensing: Active and Passive, Volume 1: Microwave Remote Sensing Fundamentals and Radiometry, Reading, MA: Addison-Wesley, 1981, Section 4–14.
T. T. Wilheit, Radiative transfer in a plane stratified dielectric, IEEE Trans. on Geosci. Elec., GE-16(1978)2, 138–143.
Author information
Authors and Affiliations
About this article
Cite this article
Lu, Y., Guo, W. & Zhang, Z. Radiation from the cryogenic calibration load for microwave radiometers. J. of Electron.(China) 15, 182–186 (1998). https://doi.org/10.1007/s11767-998-0054-3
Issue Date:
DOI: https://doi.org/10.1007/s11767-998-0054-3