Results 251 to 260 of about 12,270 (302)

A spectrometer for the measurement of complex permittivity

Journal of Physics E: Scientific Instruments, 1972
The spectrometer uses an unbalanced AC bridge and records the real or imaginary component of permittivity on a chart recorder over the frequency range from about 1 Hz to 1 MHz. The measured sensitivity extends to values of loss tangent of about 10-3 although the ultimate sensitivity is expected to be higher.
I R Edmonds, M J A Smith
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Measurement of complex permittivity and complex permeability of materials

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 2002
The time domain measurement of complex permittivity and complex permeability in the 8 to 18 GHz frequency band is considered. Some methods for determination of permittivity and permeability are presented.
H. Alenkowicz, B. Levitas
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Measurement of complex permittivity of liquids. II

Journal of Physics E: Scientific Instruments, 1974
Improvements on the method of Lovell and Cole (1959) for the measurement of complex permittivity of liquids by means of the Boonton R-X Meter are presented. A new approach to the calibration of the cell and connecting line, considering ohmic losses, is described.
N L Federigi, G H Barbenza
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Complex permittivity measurements of two conifers

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
Complex permittivity measurements in the frequency range 1-10 GHz of two conifers, a 5.0 m high Balsam fir and a 1.9 m high spruce, are presented. With the large amount of measurement data it is possible to establish representative average values for the various parts of the considered trees.
A. Franchois, R. Lang, Y. Pineiro
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Six-port Complex Permittivity Measurements

2006 European Microwave Conference, 2006
This paper describes a new method of measuring the complex relative permittivity epsiv* of high-loss and low-loss materials up to the L-band in the microwave range, based on the six-port technique. The novel feature of this method is the determination of epsiv* directly from the intersection of three circles in the complex epsiv*-plane.
A.L. de Souza Rolim, A.J. Belfort de Oliveira, M.T. de Melo   +2 more
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Waveguide Probes for Complex Permittivity Measurement

2008 14th Conference on Microwave Techniques, 2008
Paper deals with the complex permittivity measurement of biological tissues. Application of a waveguide probe for this measurement is shown. A non-destructive and non-invasive method based on reflection coefficient measurement attaching the material under test is used.
Radim Zajicek, Tomas Smejkal, Ladislav Oppl, Jan Vrba   +3 more
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Calibrated Broadband Measurement Technique for Complex Permittivity and Permeability

IEEE Transactions on Microwave Theory and Techniques, 2020
A technique to measure the complex permittivity and permeability using two different types of calibration is presented in this article. The technique is based on a classical transmission-line analysis, implemented on a strip-line structure. A new calibration technique, namely object-reflect-line (ORL), is proposed to meet the challenge of an extremely ...
M. I. Hossain, Nghia Nguyen-Trong, Abdulrahman S. M. Alqadami, Amin M. Abbosh   +3 more
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Measurement of complex permittivity of liquid dielectrics

Microwave and Optical Technology Letters, 2002
AbstractThe complex permittivity of a number of liquid dielectrics has been measured with the use of the in‐waveguide technique at the X and Ku band. The TRL calibration procedure is applied for the calibration of the waveguide system. The measured results of permittivity of distilled water agree well with those published in the literature.
Yong Wang, Mohammed N. Afsar
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Measurement of Complex Permittivity and Permeability

1970
Abstract : The program was conducted to derive a better technique for the measurement of the permeability and permittivity of lossy ferrites at microwave frequencies at temperatures up to 1000F. Although the classical method of waveguide measurement techniques was used, a careful analysis of the sources of errors was undertaken and a computer aided ...
Eva M. Thomas, Abdelnour S. Thomas
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Complex permittivity measurements of chicken blood

Microwave and Optical Technology Letters, 2003
AbstractThe basic dielectric properties of biological materials are required for the development of next‐generation microwave‐based medical instrumentation. The purpose of this paper is to further the study of the properties of blood using several different commonly used measurement methods.
E. Kratzenberg, M. N. Afsar, Y. Wang
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