Title :
A ratio transformer bridge for the measurement of low-loss tangents
Author :
Kwaaitaal, Th. ; van den Eijnden, W.M.M.M.
Author_Institution :
Dept. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands
Abstract :
The authors discuss the architecture of transformer ratio bridges for measuring the loss angles of low-loss dielectrics and describe the development of a sensitive and accurate bridge, capable of measuring loss angles with a sensitivity of 1×10-8 (S/ N=1 at a detector bandwidth of 1 Hz) and an accuracy of a few parts in 10-7. The bridge is computer controlled and has an automatic capacitive balance. Its main characteristics and their influence on sensitivity and accuracy are discussed. As an example, measurements as functions of temperature and frequency are presented
Keywords :
bridge instruments; computerised instrumentation; dielectric loss measurement; loss-angle measurement; accuracy; automatic capacitive balance; computer controlled bridge; low-loss dielectrics; measurement of low-loss tangents; ratio transformer bridge; sensitivity; transformer ratio bridges; Automatic control; Bandwidth; Bridges; Detectors; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Frequency measurement; Goniometers; Loss measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1990. IMTC-90. Conference Record., 7th IEEE
Conference_Location :
San Jose, CA
DOI :
10.1109/IMTC.1990.65951
