An accurate FDTD analysis of induced current in PEC wire in contact with half space ground by using surface impedance boundary condition

2011 ◽  
Author(s):  
T. Arima ◽  
S. Watanabe
Keyword(s):  
Boundary Condition ◽  
Half Space ◽  
Surface Impedance ◽  
Impedance Boundary Condition ◽  
Induced Current ◽  
Impedance Boundary

scholarly journals FDTD modeling of nonperiodic antenna located above metasurface using surface impedance boundary condition

2019 ◽  
Vol 6 ◽  
pp. 17
Author(s):  
Toru Uno ◽  
Takuji Arima ◽  
Akihide Kurahara
Keyword(s):  
Boundary Condition ◽  
Surface Impedance ◽  
Fdtd Method ◽  
Dipole Antenna ◽  
Point Sources ◽  
Impedance Boundary Condition ◽  
Computational Error ◽  
Impedance Boundary ◽  
Scanning Method ◽  
Computational Resources

This paper investigates an FDTD modeling method for precisely calculating the characteristics of a single, that is, a nonperiodic antenna located above a metasurface that consists of an infinite periodic conducting element on a flat dielectric substrate. The original FDTD method requires enormous computational resources to analyze such structures because an appropriate periodic boundary condition (PBC) is not supported, and a brute force approach has to be used for this reason. Another option is to use the array scanning method in which a single source is synthesized from a superposition of infinite phased array of point sources. In this method, some problems such as a mutual coupling between the single antenna and the metasurface, a computational error contained in a numerical integration over the Brillouin zone and so on have not been resolved yet. In order to resolve these difficulties and to reduce computational resources, a surface impedance boundary condition (SIBC) is incorporated into the FDTD method in this paper. The validity of the method is numerically confirmed by calculating an input impedance and a radiation pattern of a horizontal dipole antenna located above the metasurface.

The outgoing time-harmonic electromagnetic wave in a half-space with non-absorbing impedance boundary condition

2019 ◽  
Vol 53 (1) ◽  
pp. 325-350
Author(s):  
Sergio Rojas ◽  
Ignacio Muga ◽  
Carlos Jerez-Hanckes
Keyword(s):  
Boundary Condition ◽  
Electromagnetic Wave ◽  
Asymptotic Analysis ◽  
Radiation Pattern ◽  
Half Space ◽  
Existence And Uniqueness ◽  
Radiation Condition ◽  
Impedance Boundary Condition ◽  
Impedance Boundary ◽  
Time Harmonic

We show existence and uniqueness of the outgoing solution for the Maxwell problem with an impedance boundary condition of Leontovitch type in a half-space. Due to the presence of surface waves guided by an infinite surface, the established radiation condition differs from the classical one when approaching the boundary of the half-space. This specific radiation pattern is derived from an accurate asymptotic analysis of the Green’s dyad associated to this problem.

Mixed surface impedance boundary condition for FDTD simulations

2017 ◽  
Vol 11 (9) ◽  
pp. 1197-1202 ◽  
Author(s):  
Yunlong Mao ◽  
Atef Z. Elsherbeni ◽  
Tao Jiang ◽  
Si Li
Keyword(s):  
Boundary Condition ◽  
Surface Impedance ◽  
Impedance Boundary Condition ◽  
Impedance Boundary ◽  
Fdtd Simulations
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