Determination of complex permittivity for low- and high-loss materials at microwave frequencies

2014 ◽  
Author(s):  
Siddharth K. Varadan ◽  
Lisha Zhang ◽  
George Pan ◽  
Terry Alford
Keyword(s):  
Complex Permittivity ◽  
Microwave Frequencies ◽  
High Loss

High Precision Measurements of the Permittivity of Water in the Microwave Range

1990 ◽  
Vol 45 (5) ◽  
pp. 677-686 ◽  
Author(s):  
H. J. Steinhoff ◽  
A. Redhardt ◽  
K. Lieutenant ◽  
W. Chrost ◽  
G. Hess ◽  
...  
Keyword(s):  
Standard Method ◽  
Complex Permittivity ◽  
Systematic Errors ◽  
Precision Measurements ◽  
Limiting Factors ◽  
Microwave Range ◽  
Debye Function ◽  
High Loss ◽  
Relaxation Parameters

Abstract A practical version of a homodyne method for measuring the complex permittivity of high loss liquids at 3 and 9 GHz is described. The systematic errors are discussed in detail, because the homodyne method seems to be suitable as a simple standard method for precise measurements. The results of measurements on water in the temperature range 6 °C-45 °C are presented. The determination of all five parameters of the Debye function is possible. Finally, accuracy limiting factors for the determination of the relaxation parameters are discussed in detail

scholarly journals Characterisation of dielectric 3D-printingmaterials at microwave frequencies

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 26
Author(s):  
Andrea Alimenti ◽  
Kostiantyn Torokhtii ◽  
Nicola Pompeo ◽  
Emanuele Piuzzi ◽  
Enrico Silva
Keyword(s):  
Quality Factor ◽  
Loss Tangent ◽  
Complex Permittivity ◽  
High Frequency ◽  
Measurement Method ◽  
Air Gap ◽  
3D Printer ◽  
Reliable Determination ◽  
Microwave Frequencies

<p class="Abstract">3D-printer materials are becoming increasingly appealing, especially for high frequency applications. As such, the electromagnetic characterisation of these materials is an important step in evaluating their applicability for new technological devices. We present a measurement method for complex permittivity evaluation based on a dielectric loaded resonator (DR). Comparing the quality factor <em>Q</em> of the DR with a disk-shaped sample placed on a DR base, with <em>Q</em> obtained when the sample is substituted with an air gap, allows a reliable determination of the loss tangent.</p>

scholarly journals Full-Wave Modal Analysis of a Novel Dielectrometer for Accurate Measurement of Complex Permittivity of High-Loss Liquids at Microwave Frequencies

2018 ◽  
Vol 66 (12) ◽  
pp. 5760-5770
Author(s):  
David Marques-Villarroya ◽  
Antoni J. Canos ◽  
Felipe L. Penaranda-Foix ◽  
Beatriz Garcia-Banos ◽  
Jose M. Catala-Civera
Keyword(s):  
Modal Analysis ◽  
Complex Permittivity ◽  
Microwave Frequencies ◽  
High Loss ◽  
Full Wave

Determination of the Complex Permittivity of High Loss Liquids with a Novel Reentrant Cavity

2018 ◽  
Author(s):  
David Marques-Villarroya ◽  
Felipe Pcnaranda-Foix ◽  
Antoni J. Canos ◽  
Beatriz Garcia-Banos ◽  
Jose M. Catala-Civera
Keyword(s):  
Complex Permittivity ◽  
High Loss
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