Results 261 to 270 of about 12,270 (302)

Snow Microwave Complex Permittivity Measured with Resonator Sensors

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Microwave coaxial resonator sensors are used to retrieve snow complex dielectric permittivity ${\varepsilon _{\text{S}}} = \varepsilon _{\text{S}}^{\prime}{\text{i}} \cdot \varepsilon _{\text{S}}^{\prime\prime}$ from sensors frequency response. In addition to the conventional analytical approach, electromagnetic simulation software HFSS is used to ...
Reza Naderpour, Mike Schwank, Derek Houtz   +2 more
openaire   +1 more source

Measurement of complex permittivity of materials using a monopole antenna

IEEE Transactions on Geoscience and Remote Sensing, 1992
A method for measuring the complex permittivity of a material using a monopole antenna is presented. To test this technique, the complex permittivities of saline solutions in the frequency range 725-1300 MHz have been measured. The measured data are in good agreement with those obtained by other techniques. >
Y. D. He, L. C. Shen
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International Comparison of Complex Permittivity Measurement at 9 GHz

IEEE Transactions on Instrumentation and Measurement, 1974
Dielectric constant and loss measurements made by three government laboratories (of the USSR, Canada, and the U. S. A.) are compared. The two materials measured were glasses. The measurements utilized cavity resonators in the H01n mode. The errors in dielectric constant reported by the laboratories were usually ± 0.3 percent; actual differences between
Bussey, H. E., Morris, D., Zal'tsman, E. B.   +2 more
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A resonance system for measuring complex permittivity of materials

2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, 2013
Preliminarily it has been shown [1] that an open resonator (OR) attached to a certain-length superdimensional circular waveguide only maintains axially-symmetric TE01q oscillations (see Fig. 1, b and c). In addition, the resonant system of the kind features a single-frequency response over a wide frequency range and, hence, can be adopted for the ...
A.Yu. Popkov, I.K. Kuzmichev
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Nondestructive measurement of complex permittivity of sheet material

Microwave and Optical Technology Letters, 2003
AbstractIn this paper, we present a new model to determine the dielectric constant and the loss tangent of dielectric material in the sheet/slab form, with both low and high relative permittivity. A non‐destructive testing method is used, based on the microstrip patch and line resonators.
A. K. Verma, null Nasimuddin
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Waveguide measurement technique for the complex permittivity of materials

2004 14th International Crimean Conference "Microwave and Telecommunication Technology" (IEEE Cat. No.04EX843), 2004
The waveguide technique of measuring the complex permittivity of materials is considered. The exact electrodynamical model of the sensor similar to a dielectric tube in a rectangular waveguide is used for a solution of an inverse electrodynamical task that allows reducing the error of measurement results.
V.K. Berezovsky, S.V. Drobot, M.S. Khandogin, V.N. Rusakovich   +3 more
openaire   +1 more source

Measurements of the complex anisotropic permittivity of microwave laminates

2020 23rd International Microwave and Radar Conference (MIKON), 2020
Low-loss dielectric laminates that are routinely used in manufacturing of printed circuit boards (PCBs) are known to be anisotropic. The in-plane and the out-of-plane components of the dielectric permittivity have been so far typically determined using several approaches.
Pawel Kopyt, Jerzy Krupka, Bartlomiej Salski   +2 more
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Measurement of Complex Dielectric Permittivity of Quartz Systems

Materials Science Forum, 2019
The article describes the problem of the experimental determination of complex dielectric permittivity for natural, activated, and modified quartz systems. The results of determination of specific surface, complex dielectric permittivity, sands porosity are presented in this article.
Vitaly Smolko, Elizaveta Antoshkina
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The measurement and model construction of complex permittivity of vegetation

Science China Earth Sciences, 2013
The complex permittivity of targeted objects is an important factor that influences its microwave radiation and scattering characteristics. In the quantitative research of microwave remote sensing, the study of the dielectric properties of the vegetation to establish the relationship between its specific physical parameters and complex permittivity is ...
Zhen Li, JiangYuan Zeng, Quan Chen, HaiYun Bi   +3 more
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Complex Permittivity Measurement Using the Annular Slot

2005 IEEE Antennas and Propagation Society International Symposium, 2005
A new technique using a multi-port annular slot antenna for the measurement of complex permittivity is developed. The benefit of this now technique is that a two port network can be used on a planar device. The forward case of measuring S/sub 21/ is combined with a simple but effective calibration technique to compensate for the feed network.
E. Kratzenberg, M.N. Afsar, Y. Wang
openaire   +1 more source