Results 241 to 250 of about 112,114 (290)
Some of the next articles are maybe not open access.
The complex permittivity of PEDOT:PSS
The Journal of Chemical Physics, 2023High permittivity materials are required for efficient organic photovoltaic devices, and the addition of the conjugated polymer composite poly(3,4-ethylenedioxythiophen) polystyrene sulfonate (PEDOT:PSS) to dielectric polymers has been shown to significantly heighten their permittivity.
Faramarz Hossein-Babaei, Ebrahim Chegini
openaire +2 more sources
Six-port Complex Permittivity Measurements
2006 European Microwave Conference, 2006This 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 +2 more
openaire +1 more source
Complex Permittivity Studies of Polyaniline
MRS Proceedings, 1992ABSTRACTA study of the complex dielectric properties at microwave and millimeterwave frequencies on several polyanilines was performed. The polymers investigated were based on emeraldine salts. The chemically synthesized emeraldine base was protonated with acids of various pH levels.
Leonard J. Buckley, Kenneth E. Dudeck
openaire +1 more source
Biofilm Monitoring using Complex Permittivity
ECS Meeting Abstracts, 2008Abstract not Available.
Graham Yelton +3 more
openaire +1 more source
Parametric modelling of complex permittivity and permeability
1996 IEEE MTT-S International Microwave Symposium Digest, 2002This paper proposes a new method for measuring the complex permittivity and permeability of materials at microwave frequencies. Starting from reflection/transmission measurements, a parametric model of /spl epsi/ and /spl mu/ is determined using a maximum likelihood estimator.
Van Den Broeck, Tom +3 more
openaire +2 more sources
Non-destructive complex permittivity measurement of low permittivity thin film materials
Measurement Science and Technology, 2007Complex permittivity measurement of low permittivity thin films is necessary to understand the fundamental properties and to implement these materials in devices. A new technique has been developed employing split-post dielectric resonators at operating frequencies of 10 GHz and 20 GHz to measure relative permittivity and loss tangent of low ...
Easton, C.D., Jacob, M.V., Krupka, J.
openaire +2 more sources
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, 2002Complex 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
openaire +1 more source
Waveguide Probes for Complex Permittivity Measurement
2008 14th Conference on Microwave Techniques, 2008Paper 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 +3 more
openaire +1 more source
Complex permittivity measurements of chicken blood
Microwave and Optical Technology Letters, 2003AbstractThe 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
openaire +1 more source
The theories of complex permittivity
Journal of Physics C: Solid State Physics, 1972It is shown that the spectral density used by Scaife (1971) in his theory of complex permittivity is closely related to the autocorrelation function used by other authors and that both Scaife's equation and the equation in terms of autocorrelation functions follow immediately from the superposition principle.
openaire +1 more source