Results 201 to 210 of about 111,624 (264)

Effective Surface Impedance of a Printed-Circuit Tensor Impedance Surface (PCTIS)

IEEE Transactions on Microwave Theory and Techniques, 2013
The surface impedance and dispersion equation of a printed-circuit tensor impedance surface (PCTIS) are derived using a modified transverse resonance technique. A PCTIS consists of a subwavelength-patterned metallic cladding over a grounded dielectric substrate. The metallic cladding is analytically modeled as a tensor impedance sheet.
Anthony Grbic, Amit M Patel
exaly   +2 more sources

Surface impedance models for high impedance surfaces

Applied Physics A, 2011
Different analytical and numerical methods for calculating the surface impedance of a high impedance surface (HIS) structure have been studied and compared. In this article, two new approaches are proposed for calculating the surface impedance for general 2D-spatial periodic HIS structures, which include both the symmetric and asymmetric planar ...
Zhu, Y., Bossavit, A., Zouhdi, Said
openaire   +2 more sources

An Impedance Controller for Surface Alignment

Proceedings of the 4th International Conference on Control, Mechatronics and Automation, 2016
This paper present a human-inspired compliant surface to surface alignment method for robotic manipulators. The surface alignment task is break down into several stages, a) make a point contact, b) alignment of point-contact to line-contact, and finally c) surface to surface alignment.
YuanRui Yang, Masood Dehghan, Marcelo H. Ang   +2 more
openaire   +1 more source

Surface Impedance Imaging Technique

Analytical Chemistry, 2008
We demonstrate here a surface impedance imaging technique based on sensitive dependence of surface plasmon resonance (SPR) on local surface charge density. By applying a potential modulation to a sensor surface, we are able to simultaneously obtain three images: the dc component and the amplitude and phase of the ac component.
Kyle J, Foley, Xiaonan, Shan, N J, Tao
openaire   +2 more sources

Surface impedance of antiferromagnetic superconductors

Physics Letters A, 1979
Abstract The dependence of the low-frequency surface impedance on the types of magnetic configurations induced by an external field in an antiferromagnetic superconductor is given.
Krzysztoń, T., Kozlowski, Gregory, Tekiel, P.   +2 more
openaire   +2 more sources

Calculation of the Surface Impedance, Generalization of the Notion of Surface Impedance

1997
In all of the previous chapters, we have dealt with objects whose surfaces are described by an impedance Z, which is defined via the relationship $$\vec E - \hat n\left( {\hat n \cdot \vec E} \right) = {\text{Z}}n \times \vec H.$$
Daniel Bouche, Frédéric Molinet, Raj Mittra   +2 more
openaire   +1 more source

Electrochemical Impedance Imaging on Conductive Surfaces

Analytical Chemistry, 2021
Electrochemical impedance spectroscopy (EIS) is a powerful tool to measure and quantify the system impedance. However, EIS only provides an average result from the entire electrode surface. Here, we demonstrated a reflection impedance microscope (RIM) that allows us to image and quantify the localized impedance on conductive surfaces.
Yaping Shi, Guangxia Feng, Xiaoliang Li, Xu Yang, Abdulsattar H. Ghanim, Paul Ruchhoeft, David Jackson, Syed Mubeen, Xiaonan Shan   +8 more
openaire   +2 more sources

Surface Impedance of Isotropic Metamaterials

Russian Physics Journal, 2018
The Leontovich impedance condition is considered in relation to the boundary with an external isotropic medium characterized by the effective parameters of metamaterials. The surface impedance depends not only on the complex dielectric permittivity and complex magnetic permeability of the substance, but also on the type of the evanescent plane wave ...
openaire   +2 more sources

Surface acoustic impedance and causality

The Journal of the Acoustical Society of America, 2001
Several models that are commonly used to calculate the surface acoustic impedance of porous materials are examined in light of the causality requirement in its nonlocal and its approximate local forms. Strict (nonlocal) causality requires that the imaginary part of the surface acoustic impedance be the Hilbert transform of the real part.
openaire   +2 more sources

The impedance of a curved surface

Optics Communications, 1993
Abstract We obtain the impedance boundary condition for the electromagnetic field at a two-dimensional curved boundary between vacuum and a metal, as an expansion in powers of d(ω)|( 1 R min )−( 1 R max )| , where d (ω) is the skin depth of the metal at the frequency ω of the electromagnetic field and R min , R max are ...
T.T. Ong, V. Celli, A.A. Maradudin
openaire   +1 more source