Relative Permittivity Measurements of Gaseous, Liquid, and Supercritical Dimethyl Ether

2007 ◽  
Vol 52 (2) ◽  
pp. 363-367 ◽  
Author(s):  
Wayne Eltringham ◽  
Owen J. Catchpole
Keyword(s):  
Dimethyl Ether ◽  
Relative Permittivity ◽  
Permittivity Measurements

Relative Permittivity Measurements of Dimethyl Ether + Carbon Dioxide Mixtures

2008 ◽  
Vol 53 (3) ◽  
pp. 826-829 ◽  
Author(s):  
Wayne Eltringham ◽  
Stephen J. Tallon ◽  
Owen J. Catchpole ◽  
Kristina Fenton
Keyword(s):  
Carbon Dioxide ◽  
Dimethyl Ether ◽  
Relative Permittivity ◽  
Permittivity Measurements

scholarly journals Determination of the Material Relative Permittivity in the UHF Band by Using T and Modified Ring Resonators

2016 ◽  
Vol 62 (2) ◽  
pp. 129-134 ◽  
Author(s):  
Piotr Jankowski-Mihułowicz ◽  
Wojciech Lichoń ◽  
Grzegorz Pitera ◽  
Mariusz Węglarski
Keyword(s):  
Relative Permittivity ◽  
Software Tool ◽  
Test Sample ◽  
Ring Resonators ◽  
Model Calculations ◽  
Electronic Products ◽  
Materials Used ◽  
Permittivity Measurements ◽  
Uhf Band

Abstract The complete methodology of designing T- and modified ring resonators in the UHF band are presented in the paper. On the basis of proposed algorithms, the dedicated software tool has been elaborated in order to determine material parameters of contemporary substrates. The program is implemented in the Mathcad environment and it includes the base of information on known materials used in electronic products. Also, test sample series for selected substrate materials (IS680, FR408, I-SPEED PCB ISOLA and A6-S LTCC FERRO) and operating frequencies from 1 GHz to 3 GHz are analyzed in details. The special test stand with a vector network analyzer has been applied in experiments. The obtained data of relative permittivity measurements and model calculations are described, discussed and concluded.

scholarly journals Potato tuber permittivity during deformation in compression

2008 ◽  
Vol 53 (No. 3) ◽  
pp. 79-84 ◽  
Author(s):  
J. Blahovec ◽  
J. Sobotka
Keyword(s):  
Potato Tuber ◽  
Complex Permittivity ◽  
Relative Permittivity ◽  
Structural Changes ◽  
Potato Tissue ◽  
Compression Loading ◽  
Permittivity Measurements ◽  
Permittivity Spectrum

Potato tuber specimens of two varieties (Nicola and Saturna) were deformed in a compression loading/unloading test. The tuber complex permittivity spectrum at frequencies 0.1–500 kHz was measured repeatedly during the deformation. The results show that both parts of relative permittivity (real and imaginary) decrease with increasing deformation and vice versa. The same trend was observed at all studied frequencies even if it was not equally strong in all cases. The permittivity plots versus frequency were similar in both the tested varieties and in different stages of deformation. The influence of tuber deformation on the permittivity values as well as the reversibility of the permittivity changes during the deformation are changed substantially at strains about 20% in comparison to strains up to 10%. The obtained results support the hypothesis that permittivity measurements can serve as an alternative indication of the internal structural changes in potato tissue during its loading.

Relative permittivity measurements of aqueous co-solvent systems including tetrahydrofuran

2017 ◽  
Vol 11-12 ◽  
pp. 59-66
Author(s):  
Dane W. Scott ◽  
Floyd L. Wiseman ◽  
William C. Cooper ◽  
Yahya S. Alseiha
Keyword(s):  
Relative Permittivity ◽  
Solvent Systems ◽  
Permittivity Measurements
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