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Measurement of dielectrics at 100 GHz with an open resonator connected to a network analyzer

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4 Author(s)
Hirvonen, T.M. ; Radio Lab., Helsinki Univ. of Technol., Espoo, Finland ; Vainikainen, P. ; Lozowski, Andrzej ; Raisanen, A.V.

A high-Q hemispherical open resonator is connected to an automatic network analyzer to enable precise and fast determination of the permittivity and loss tangent of low-loss dielectric materials at 100 GHz. Both scalar theory and vector theory with a frequency variation method are used to determine the dielectric properties of low-loss materials which are used in quasioptical components, for example in fusion reactor windows and tenses for millimeter-wave receivers. The uncertainty of the measurement is 0.02% to 0.04% for εrr⩾2) and 6-40×10-6 for tan δ(10-4⩽tan δ⩽10-3 )

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Instrumentation and Measurement, IEEE Transactions on  (Volume:45 ,  Issue: 4 )