Numerical analysis of a metasurface based on elliptic dielectric resonators for transmission control of electromagnetic waves

2016 ◽  
Author(s):  
A. Yahyaoui ◽  
H. Rmili ◽  
L. Laadhar ◽  
T. Aguili
Keyword(s):  
Numerical Analysis ◽  
Electromagnetic Waves ◽  
Dielectric Resonators ◽  
Transmission Control

scholarly journals Transmission Control of Electromagnetic Waves by Using Quarter-Wave Plate and Half-Wave Plate All-Dielectric Metasurfaces Based on Elliptic Dielectric Resonators

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ali Yahyaoui ◽  
Hatem Rmili ◽  
Karim Achouri ◽  
Muntasir Sheikh ◽  
Abdullah Dobaie ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Electromagnetic Waves ◽  
Quarter Wave Plate ◽  
Dielectric Resonators ◽  
Transmission Control ◽  
Half Wave Plate ◽  
Wave Plate ◽  
Polarized Waves ◽  
Half Wave ◽  
Quarter Wave

We present the design of all-dielectric Quarter-Wave Plate (QWP) and Half-Wave Plate (HWP) metasurfaces based on elliptic dielectric resonators (EDRs) for the transmission control of electromagnetic waves over the frequency band 20–30 GHz. First, an extensive numerical analysis was realized by studying the effect of the resonators geometry (thickness and ellipticity) on the transmission of both x- and y-polarized waves. Then, based on the numerical analysis, we have realized and characterized experimentally both QWP and HWP all-dielectric metasurfaces.

Debye Coefficients for Biological Tissues From 100 MHz to 100 GHz

2021 ◽  
Vol 35 (11) ◽  
pp. 1424-1425
Author(s):  
Rachel Lumnitzer ◽  
Allison Tanner ◽  
Atef Elsherbeni
Keyword(s):  
Numerical Analysis ◽  
Human Body ◽  
Complex Permittivity ◽  
Electromagnetic Waves ◽  
Fdtd Method ◽  
Biological Tissues ◽  
Expansion Coefficients ◽  
Numerical Solver

Debye modeling of dispersive, biological tissues allows for the numerical analysis of electromagnetic waves in the vicinity of a human body using the FDTD method. Three-term Debye expansion coefficients for 55 human biological tissues are determined via a two-step numerical solver. The Debye coefficients obtained predict precisely the complex permittivity of the experimentally available tissue data.

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