Adjustable resonant cavity for measuring the complex permittivity of dielectric materials

D. Gershon; J. P. Calame; Y. Carmel; T. M. Antonsen

doi:10.1063/1.1304865

Adjustable resonant cavity for measuring the complex permittivity of dielectric materials

D. Gershon, J. P. Calame, Y. Carmel, T. M. Antonsen

Research output: Contribution to journal › Review article › peer-review

17 Scopus citations

Abstract

An adjustable resonance cavity was developed to measure the complex permittivity of dielectric materials. The cavity has an inner diameter of 16.400 cm and an inner height of 2.54 cm. The aluminum stationary wall holder was positioned about 10.8 cm above the top of the cavity. It was fixed into place by three 1.27-cm-diam linear shafts. By suspending from the wall holder, the movable wall moved vertically by sliding on 1.27 cm bore-closed ball bushings. By turning a 1 in.-12 nut, the movable wall could be positioned so that the cavity height equaled the height of the sample. Therefore, this enables the measurement of the permittivity of samples with heights between 0.88 and 1.91 cm and radius between 1.27 and 3.18 cm. The complex permittivity of the sample was calculated based upon the sample dimensions, central frequency of TM_ono modes, and Q factor of the resonance curve using an exact solution. The complex permittivity was measured at the three lowest modes, where the frequency span is 1 -4 GHz.

Original language	English
Pages (from-to)	3207-3209
Number of pages	3
Journal	Review of Scientific Instruments
Volume	71
Issue number	8
DOIs	https://doi.org/10.1063/1.1304865
State	Published - 1 Jan 2000
Externally published	Yes

ASJC Scopus subject areas

Instrumentation

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10.1063/1.1304865

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title = "Adjustable resonant cavity for measuring the complex permittivity of dielectric materials",

abstract = "An adjustable resonance cavity was developed to measure the complex permittivity of dielectric materials. The cavity has an inner diameter of 16.400 cm and an inner height of 2.54 cm. The aluminum stationary wall holder was positioned about 10.8 cm above the top of the cavity. It was fixed into place by three 1.27-cm-diam linear shafts. By suspending from the wall holder, the movable wall moved vertically by sliding on 1.27 cm bore-closed ball bushings. By turning a 1 in.-12 nut, the movable wall could be positioned so that the cavity height equaled the height of the sample. Therefore, this enables the measurement of the permittivity of samples with heights between 0.88 and 1.91 cm and radius between 1.27 and 3.18 cm. The complex permittivity of the sample was calculated based upon the sample dimensions, central frequency of TMono modes, and Q factor of the resonance curve using an exact solution. The complex permittivity was measured at the three lowest modes, where the frequency span is 1 -4 GHz.",

author = "D. Gershon and Calame, {J. P.} and Y. Carmel and Antonsen, {T. M.}",

year = "2000",

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TY - JOUR

T1 - Adjustable resonant cavity for measuring the complex permittivity of dielectric materials

AU - Gershon, D.

AU - Calame, J. P.

AU - Carmel, Y.

AU - Antonsen, T. M.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - An adjustable resonance cavity was developed to measure the complex permittivity of dielectric materials. The cavity has an inner diameter of 16.400 cm and an inner height of 2.54 cm. The aluminum stationary wall holder was positioned about 10.8 cm above the top of the cavity. It was fixed into place by three 1.27-cm-diam linear shafts. By suspending from the wall holder, the movable wall moved vertically by sliding on 1.27 cm bore-closed ball bushings. By turning a 1 in.-12 nut, the movable wall could be positioned so that the cavity height equaled the height of the sample. Therefore, this enables the measurement of the permittivity of samples with heights between 0.88 and 1.91 cm and radius between 1.27 and 3.18 cm. The complex permittivity of the sample was calculated based upon the sample dimensions, central frequency of TMono modes, and Q factor of the resonance curve using an exact solution. The complex permittivity was measured at the three lowest modes, where the frequency span is 1 -4 GHz.

AB - An adjustable resonance cavity was developed to measure the complex permittivity of dielectric materials. The cavity has an inner diameter of 16.400 cm and an inner height of 2.54 cm. The aluminum stationary wall holder was positioned about 10.8 cm above the top of the cavity. It was fixed into place by three 1.27-cm-diam linear shafts. By suspending from the wall holder, the movable wall moved vertically by sliding on 1.27 cm bore-closed ball bushings. By turning a 1 in.-12 nut, the movable wall could be positioned so that the cavity height equaled the height of the sample. Therefore, this enables the measurement of the permittivity of samples with heights between 0.88 and 1.91 cm and radius between 1.27 and 3.18 cm. The complex permittivity of the sample was calculated based upon the sample dimensions, central frequency of TMono modes, and Q factor of the resonance curve using an exact solution. The complex permittivity was measured at the three lowest modes, where the frequency span is 1 -4 GHz.

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DO - 10.1063/1.1304865

M3 - Review article

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SN - 0034-6748

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EP - 3209

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 8

ER -

Adjustable resonant cavity for measuring the complex permittivity of dielectric materials

Abstract

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