Title :
Radiometric-Waveguide Calibrators
Author :
Wollack, E.J. ; Fixsen, D.J. ; Kogut, A. ; Limon, M. ; Mirel, P. ; Singal, J.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt
Abstract :
We describe the electromagnetic and thermal design, performance, and fabrication for two types of radiometric- waveguide load calibrators. A simple theory is presented and used to minimize the total volume of the absorber structure. These devices have been used from room temperature to below 4 K in microwave to millimeter wavebands. The estimated precision of the calibrator is better than 1 mK absolute at temperatures near 2.7 K.
Keywords :
calibration; radiometry; waveguide components; absorber structure; loaded waveguides; millimeter wavebands; radiometric-waveguide calibrators; waveguide components; Dielectric losses; Electromagnetic waveguides; Loaded waveguides; Microwave devices; Microwave radiometry; NASA; Power measurement; Temperature; Thermal conductivity; Thermal loading; Calorimeters and power measurement standards; cryogenic instrumentation; loaded waveguides, microwave absorbers, terminations, and reference loads; waveguide components;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.903646
