Title :
The multistate radiometer: a novel means for impedance and noise temperature measurement
Author :
Wiatr, Wojciech ; Schmidt-Szalowski, Marek
Author_Institution :
Warsaw Univ. of Technol., Poland
fDate :
4/1/1997 12:00:00 AM
Abstract :
A novel noise measurement system for the simultaneous determination of the complex impedance and the noise temperature of microwave one-port devices is introduced. Its unique measurement capability is provided by using a specific excitation of the device under test (DUT) from a noise injection circuit at the input of an rf total power radiometer. Due to power measurement of interfering noise waves its operation is like that of a six-port or multistate reflectometer, thus leading to similar techniques for the system calibration and accuracy enhancement. Experimental results show the good measurement accuracy of this new tool
Keywords :
calibration; electric impedance measurement; electric noise measurement; microwave measurement; radiometry; accuracy enhancement; complex impedance measurement; device under test; microwave one-port devices; multistate radiometer; noise injection circuit; noise temperature measurement; rf total power radiometer; system calibration; Acoustic reflection; Calibration; Circuit noise; Circuit testing; Impedance; Microwave devices; Microwave radiometry; Noise measurement; Power measurement; Temperature measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
