Title :
Intercomparison of permittivity measurements using the transmission/reflection method in 7-mm coaxial transmission lines
Author :
Vanzura, Eric J. ; Baker-Jarvis, James R. ; Grosvenor, John H. ; Janezic, Michael D.
Author_Institution :
Electromagn. Fields Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
Broadband permittivity measurements made by eleven organizations using the transmission/reflection (T/R) method are compared to high-accuracy cavity resonator results. T/R accuracy is less than 10% for εr\´<15, and the smallest measureable loss factor is εr"≈0.05. Uncertainty caused by the air gaps between the specimen and the inner and outer conductors is the largest contributor to the overall uncertainty. Compared to other dimensional measurement methods, physical measurement of specimen bore and outer diameters yield the most accurate gap corrections
Keywords :
coaxial cables; measurement errors; microwave measurement; permittivity measurement; 7 mm; T/R method; air gaps; broadband measurements; coaxial transmission lines; gap corrections; loss factor; permittivity measurements; transmission/reflection method; Air gaps; Coaxial components; Dielectric materials; Dielectric measurements; Electromagnetic measurements; Microwave measurements; NIST; Particle measurements; Permittivity measurement; Reflection;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
