Results 241 to 250 of about 25,320 (296)

Bone-marrow edema estimation with a microwave imaging open-ended coaxial probe array in ex vivo bovine long bones: comparison with CT. [PDF]

Eur Radiol Exp
Conti N, Giaccaglia P, Lidoni V, Rosa A, Sconfienza LM.   +4 more
europepmc   +1 more source

A model of optical pump-terahertz probe by ultrafast terahertz near-field microscopy. [PDF]

iScience
Zhang Z, Huang Z, Xu A, Li J, Li P, Cai J, Dai M, Nie T, El Moutaouakil A, Wu X.   +9 more
europepmc   +1 more source

A novel approach to design broadband tunable microwave absorber using expanded graphite on a flexible substrate. [PDF]

Sci Rep
Borah D, Boruah MJ, Das BC, Das D, Bhattacharyya NS.   +4 more
europepmc   +1 more source

Complex Permittivity Studies of Polyaniline

MRS Proceedings, 1992
ABSTRACTA 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
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The complex permittivity of PEDOT:PSS

The Journal of Chemical Physics, 2023
High 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

Interpretation and Separability of the Effective Permittivity in Case that Both Permittivity and Conductivity are Complex

2023 URSI International Symposium on Electromagnetic Theory (EMTS), 2023
The paper is about the interpretation and separability of the effective permittivity in case that both the permittivity and the conductivity are dispersive and thus complex-valued. It is shown that: a) it is always possible to retrieve the static conductivity and the high-frequency (optical) permittivity from the effective permittivity; b) it is in ...
Giacomo Giannetti, Ludger Klinkenbusch
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Bounds on the complex permittivity of sea ice [PDF]

Journal of Geophysical Research: Oceans, 1995
An analytic method for obtaining bounds on effective properties of composites is applied to the complex permittivity ∈* of sea ice. The sea ice is assumed to be a two‐component random medium consisting of pure ice of permittivity ∈1 and brine of permittivity ∈2. The method exploits the properties of ∈* as an analytic function of the ratio ∈1/∈2.
Golden, Kenneth M.
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Extraction of the Complex Permittivity of PCB

2020 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2020
With the increase of the system working frequency, there is a great demand for the signal integrity of PCB (Printed Circuit Board). There are various types of PCB substrates on the market. These substrates show different electrical properties and uncertainty, due to the differences in composition.
Chong-Xin Xu, Yu-Ru Feng, Xing-Chang Wei
openaire   +1 more source

Parametric modelling of complex permittivity and permeability

1996 IEEE MTT-S International Microwave Symposium Digest, 2002
This 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, Dhondt, Geert, Barel, Alain, Martens, Luc   +3 more
openaire   +2 more sources