U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Proximity effects in the calibration of microwave radiometers

Published

Author(s)

Ronald C. Wittmann, Amanda Cox, Randy Direen

Abstract

Microwave, total-power radiometers are calibrated by observing sources of known brightness temperature. Free-space calibrations are usually performed assuming far-field interactions, although the actual calibration source may be well into the near-field region of the radiometer antenna. Here, we simulate the free-space coupling between radiometer and calibration target to explore the potential contribution of proximity effects to measurement uncertainty.
Proceedings Title
Proc., Antenna Meas. Tech. Asoc. Symp.
Conference Dates
October 30-November 4, 2005
Conference Location
Newport, RI, USA
Conference Title
Antenna Measurement Techniques Association
Pub Type
Conferences

Keywords

calibration, microwave, near-field gain, radiometer, remote sensing, uncertainty analysis
Electromagnetics

Citation

Wittmann, R. , Cox, A. and Direen, R. (2005), Proximity effects in the calibration of microwave radiometers, Proc., Antenna Meas. Tech. Asoc. Symp., Newport, RI, USA (Accessed June 3, 2023)

Created September 30, 2005, Updated October 12, 2021