Estimation of Surface Waves along a Metal Grating Using an Equivalent Impedance Model

2012 ◽  
Vol E95-C (4) ◽  
pp. 717-724
Author(s):  
Michinari SHIMODA ◽  
Toyonori MATSUDA ◽  
Kazunori MATSUO ◽  
Yoshitada IYAMA
Keyword(s):  
Surface Waves ◽  
Impedance Model ◽  
Metal Grating ◽  
Equivalent Impedance

Measurements and Modeling of Conducted EMI in a Buck Chopper

2011 ◽  
Vol 324 ◽  
pp. 419-422
Author(s):  
Leila Fakhfakh ◽  
Slim Abid ◽  
Anis Ammous
Keyword(s):  
Electronic Devices ◽  
Fast Fourier Transformation ◽  
Network Analyzer ◽  
Time Domain Simulation ◽  
High Increase ◽  
Impedance Model ◽  
Equivalent Impedance ◽  
Measurement Methodology ◽  
Electromagnetic Behavior ◽  
Conducted Emi

The high increase of power electronic devices use (speed control, lighting, heating, automotive, etc...) requires the electrical, thermal and electromagnetic behavior studies. In this paper we developed a model to predict the conducted EMI level in a DC/DC converter. Measurement methodology was done using a network analyzer in order to evaluate the equivalent impedance model of each converter element. The full circuit model is then implemented in the Saber® simulation tool using time domain simulation followed by fast Fourier transformation (FFT) in the frequency range 150 KHz -100 MHz. A comparison between simulation results and those obtained by measurements is used to validate the developed model.

scholarly journals Metasurface transformation for surface wave control

2015 ◽  
Vol 373 (2049) ◽  
pp. 20140355 ◽  
Author(s):  
E. Martini ◽  
M. Mencagli ◽  
S. Maci
Keyword(s):  
Surface Wave ◽  
Boundary Conditions ◽  
Surface Waves ◽  
Plane Waves ◽  
Transformation Optics ◽  
Microwave Frequencies ◽  
Dielectric Substrates ◽  
Equivalent Impedance ◽  
Sub Wavelength ◽  
Wave Control

Metasurfaces (MTSs) constitute a class of thin metamaterials used for controlling plane waves and surface waves (SWs). At microwave frequencies, they are constituted by a metallic texture with elements of sub-wavelength size printed on thin grounded dielectric substrates. These structures support the propagation of SWs. By averaging the tangential fields, the MTSs can be characterized through homogenized isotropic or anisotropic boundary conditions, which can be described through a homogeneous equivalent impedance. This impedance can be spatially modulated by locally changing the size/orientation of the texture elements. This allows for a deformation of the SW wavefront which addresses the local wavevector along not-rectilinear paths. The effect of the MTS modulation can be analysed in the framework of transformation optics. This article reviews theory and implementation of this MTS transformation and shows some examples at microwave frequencies.

Pulsed discharges produced by surface waves

1998 ◽  
Vol 08 (PR7) ◽  
pp. Pr7-317-Pr7-326 ◽  
Author(s):  
O. A. Ivanov ◽  
A. M. Gorbachev ◽  
V. A. Koldanov ◽  
A. L. Kolisko ◽  
A. L. Vikharev
Keyword(s):  
Surface Waves ◽  
Pulsed Discharges

Magnetoacoustic surface waves in magnetic crystals near spin-reorientation phase transitions

1997 ◽  
Vol 167 (7) ◽  
pp. 735-750 ◽  
Author(s):  
Yurii V. Gulyaev ◽  
Igor E. Dikshtein ◽  
Vladimir G. Shavrov
Keyword(s):  
Phase Transitions ◽  
Surface Waves ◽  
Spin Reorientation

The Role Of Surface Waves On The Upper Ocean: Application In Indonesian Seas

Jurnal Segara ◽  
2012 ◽  
Vol 8 (1) ◽  
pp. 1 ◽  
Author(s):  
Rita Tisiana Dwi Kuswardani ◽  
Fangli Qiao
Keyword(s):  
Surface Waves ◽  
Upper Ocean ◽  
Indonesian Seas
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