Results 31 to 40 of about 82,990 (311)
A New Planar Microwave Sensor for Building Materials Complex Permittivity Characterization
Sensors, 2020 A new microwave sensor is proposed to characterize the complex relative permittivity of building non-magnetic materials and used in the characterization of three concrete samples.
João G. D. Oliveira +4 more
doaj +1 more source
AIP Advances, 2016 The permittivity and conductivity of chemical vapor deposited monolayer graphene are investigated up to 40 GHz. The characterization method is based on a coplanar waveguide transmission line structure that is fabricated on a multilayer substrate of Si ...
Yunqiu Wu +6 more
doaj +1 more source
Microwave dielectric properties of horticultural peat products [PDF]
Mires and Peat, 2007 The microwave dielectric properties of horticultural peat and compost peat were measured with a HP85107C network analyser in conjunction with a HP85070B open-ended coaxial dielectric probe for the frequency range 0.5–20 GHz.
G. Ayalew, N.M. Holden, S.M. Ward
doaj
Complex effective permittivity of a lossy composite material [PDF]
, 1996 In recent work, boundary integral equations and finite elements were used to study the (real) effective permittivity for two-component dense composite materials in the quasistatic limit.
Beroual, Abderrahmane +3 more
core +3 more sources
Научный вестник МГТУ ГА, 2019 When using remote radiophysical methods in problems of monitoring the environment, the central place belongs to solving problems of determining its electrophysical characteristics, i.e. dielectric permittivity e, conductivity c (complex permittivity ek).
L. Р. Ligthart +3 more
doaj +1 more source
Potato tuber permittivity during deformation in compression
Research in Agricultural Engineering, 2007 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.
J. Blahovec, J. Sobotka
doaj +1 more source
The negative index of refraction demystified
, 2002 We study electromagnetic wave propagation in mediums in which the effective relative permittivity and the effective relative permeability are allowed to take any value in the upper half of the complex plane.
Akhlesh Lakhtakia +5 more
core +2 more sources
Parallel preconditioners for high order discretizations arising from full system modeling for brain microwave imaging [PDF]
, 2016 This paper combines the use of high order finite element methods with parallel preconditioners of domain decomposition type for solving electromagnetic problems arising from brain microwave imaging.
Bonazzoli +10 more
core +5 more sources
Image theory for a sphere with negative permittivity
, 2019 An image system for a point charge outside a dielectric sphere is presented for all complex values of relative permittivity $\epsilon=\epsilon'+i\epsilon''$.
Majic, Matt
core +1 more source
Method for Computationally Efficient Design of Dielectric Laser Accelerators [PDF]
, 2017 Dielectric microstructures have generated much interest in recent years as a means of accelerating charged particles when powered by solid state lasers.
England, R. Joel +4 more
core +3 more sources