Results 21 to 30 of about 142,451 (184)

Electromagnetic Wave Scattering by Small Impedance Particles of an Arbitrary Shape [PDF]

open access: yes, 2012
Scattering of electromagnetic (EM) waves by one and many small ($ka\ll 1$) impedance particles $D_m$ of an arbitrary shape, embedded in a homogeneous medium, is studied. Analytic formula for the field, scattered by one particle, is derived. The scattered
A. G. Ramm   +16 more
core   +5 more sources

Using a Parallel Helical Sensing Cable for the Distributed Measurement of Ground Deformation

open access: yesSensors, 2019
Surface and underground stretched deformation is one of the most important physical measurement quantities for geological-disaster monitoring. In this study, a parallel helical sensing cable (PHSC) based on the time–domain reflectometry (TDR ...
Xiushan Wu   +4 more
doaj   +1 more source

Conformal Design of a High-Performance Antenna for Energy-Autonomous UWB Communication

open access: yesSensors, 2021
In view of the need for communication with distributed sensors/items, this paper presents the design of a single-port antenna with dual-mode operation, representing the front-end of a future generation tag acting as a position sensor, with identification
Shobit Agarwal   +3 more
doaj   +1 more source

Frequency-Diverse Holographic Metasurface Antenna for Near-Field Microwave Computational Imaging

open access: yesFrontiers in Materials, 2021
This article presents a holographic metasurface antenna with stochastically distributed surface impedance, which produces randomly frequency-diverse radiation patterns. Low mutual coherence electric field patterns generated by the holographic metasurface
Jiaqi Han   +12 more
doaj   +1 more source

The Apparent Constant-Phase-Element Behavior of an Ideally Polarized Blocking Electrode [PDF]

open access: yes, 2007
Two numerical methods were used to calculate the influence of geometry-induced current and potential distributions on the impedance response of an ideally polarized disk electrode.
Huang, Vicky Mei-Wen   +4 more
core   +3 more sources

Modeled channel distributions explain extracellular recordings from cultured neurons sealed to microelectrodes [PDF]

open access: yes, 2002
Amplitudes and shapes of extracellular recordings from single neurons cultured on a substrate embedded microelectrode depend not only on the volume conducting properties of the neuron-electrode interface, but might also depend on the distribution of ...
Buitenweg, Jan Reinoud   +2 more
core   +3 more sources

An electrochemical and surface analytical study of the formation of nanoporous oxides on niobium [PDF]

open access: yes, 2007
In the present paper, the anodization of Nb in mixed sulphate + fluoride electrolytes resulting in the formation of a nanoporous oxide film has been studied.
Bojinov, Martin   +3 more
core   +4 more sources

Application of the surface‐charge distribution method to the interpretation of impedance measurements of a rocket‐borne dipole antenna [PDF]

open access: yesRadio Science, 1998
In a companion paper [Béghin and Kolesnikova, this issue], we have presented the surface charge‐distribution (SCD) method for modeling a complex devices's behavior in the radio frequency range around the plasma resonance. Here we give one application of this method to the interpretation of published experimental data of a sounding rocket experiment ...
E. Kolesnikova, C. Béghin
openaire   +1 more source

The origin of the complex character of the ohmic impedance [PDF]

open access: yes, 2010
The local and global Ohmic response for an electrode exhibiting geometry-induced potential and/or current distributions has recently been shown to be represented by a frequency-dependent complex impedance.
Blanc, Christine   +5 more
core   +2 more sources

The reflection coefficient of a surface of Rayleigh distributed impedance [PDF]

open access: yesQuarterly of Applied Mathematics, 1957
Formulas are obtained for the probability distribution p ( k ) p\left ( k \right ) of the amplitude k k of ( z − c
openaire   +1 more source

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