Title :
Milliwatt calorimeter for the 90--140 GHz waveguide band
Author_Institution :
Max-Planck-Institut fÿr Radioastronomie, Bonn, West Germany
Abstract :
A calorimeter with settling time of less than 30s has been constructed for the 90--140 GHz waveguide band. The calorimeter partially compensates for losses in its waveguide section by sensing the heat generated in the waveguide. The operating power range is 1 to 100 mW, and the absolute precision is less than 4% for powers ⩾10 mW.
Keywords :
calibration; calorimeters; loss measurement; microwave measurement; power measurement; rectangular waveguides; 90 to 140 GHz; calibration; calorimeters; loss compensation; loss measurement; microwave measurement; milliwatt calorimeter; power measurements; rectangular waveguides;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740304
