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

Volume

42

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

2063

Lastpage

2070

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 ε_r^\´<15, and the smallest measureable loss factor is ε_r^"≈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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.330120

Filename

330120