An automated 60 GHz open resonator system for precision measurement of loss tangent and permittivity

Author

Afsar, M.N. ; Li, X. ; Chi, H.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Tufts Univ., Medford, MA, USA

fYear

1990

fDate

11-14 June 1990

Firstpage

240

Lastpage

241

Abstract

A Fabry-Perot hemispherical open resonator system has been designed and constructed for precision measurement of loss tangent and dielectric permittivity of low absorbing materials at 60 GHz. The resonator system uses a cavity made with optically polished copper spherical and flat mirrors, highly stabilized synthesized phase-locked Gunn oscillator sources, and a superheterodyne receiver to enable measurement of loss tangent values as low as 10 mu rad. Using this system, the real part of the dielectric permittivity can be measured with an accuracy almost as high as that achieved with dispersive Fourier transform spectroscopy. A block diagram of the complete measurement system is presented.<>

Keywords

cavity resonators; computerised instrumentation; dielectric loss measurement; microcomputer applications; microwave measurement; permittivity measurement; 60 GHz; Cu; Fabry-Perot hemispherical open resonator; automatic instrumentation; flat mirrors; measurement of loss tangent; optically polished spherical mirror; stabilized synthesized phase-locked Gunn oscillator sources; superheterodyne receiver; Dielectric loss measurement; Dielectric losses; Dielectric materials; Dielectric measurements; Fabry-Perot; Loss measurement; Optical losses; Optical receivers; Optical resonators; Permittivity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.110006

Filename

110006