The scattering of partially coherent electromagnetic beam illumination from a statistically rough surface modeled as a perfect electrical conductor

2014 ◽  
Author(s):  
Mark F. Spencer ◽  
Milo W. Hyde ◽  
Santasri Basu ◽  
Michael A. Marciniak
Keyword(s):  
Rough Surface ◽  
Electrical Conductor ◽  
Electromagnetic Beam ◽  
Partially Coherent ◽  
Perfect Electrical Conductor

scholarly journals On the Accuracy of Asymptotic Solutions for TM Waves Diffracting on an Impedance Wedge

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Sonia Fu ◽  
Pierre Jacolot ◽  
Tommaso Balercia ◽  
Christian Rom ◽  
Jørgen B. Andersen ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Boundary Conditions ◽  
The Other ◽  
Asymptotic Solutions ◽  
Electrical Conductor ◽  
Impedance Wedge ◽  
Uniform Theory Of Diffraction ◽  
Approximate Boundary Conditions ◽  
Perfect Electrical Conductor

The contribution focuses on the accuracy of two asymptotic solutions aimed at representing the electromagnetic field scattered by penetrable wedges. One is a heuristic manipulation of the solution for the perfect electrical conductor, and the other one is a more rigorous coefficient based on approximate boundary conditions. The results presented here extend those proposed by other authors by illustrating the accuracy of such solutions at the edge of validity of the uniform theory of diffraction. In particular, they show that the heuristic formulation can be freely applied in similar conditions, while the other might not always lead to accurate predictions.

scholarly journals Reshaping the perfect electrical conductor cylinder arbitrarily

2008 ◽  
Vol 10 (11) ◽  
pp. 113016 ◽  
Author(s):  
Huanyang Chen ◽  
Xiaohe Zhang ◽  
Xudong Luo ◽  
Hongru Ma ◽  
Che Ting Chan
Keyword(s):  
Electrical Conductor ◽  
Perfect Electrical Conductor

1D and 2D phase gradient perforated dielectric reflective surfaces atmmWave

2017 ◽  
Vol 10 (4) ◽  
pp. 446-452 ◽  
Author(s):  
Mustafa K. Taher Al-Nuaimi ◽  
Wei Hong ◽  
Xiqi Gao
Keyword(s):  
Electromagnetic Waves ◽  
Normal Incidence ◽  
Electrical Conductor ◽  
Wave Regime ◽  
Phase Gradient ◽  
Reflected Waves ◽  
Dielectric Surfaces ◽  
Full Wave ◽  
Perfect Electrical Conductor ◽  
Reflective Surfaces

This paper presents the design of all dielectric non-absorptive phase gradient reflective surfaces that can be used to manipulate the reflected electromagnetic waves at millimeter-wave regime. Compared with a bare perfect electrical conductor reflector which obeys the classical Snell's law of reflection, the presented design can effectively alter both the shape and level of the backscattered energy and thus radar cross section (RCS) reduction is achieved in the specular direction. One- and two-dimensional phase gradient reflective dielectric surfaces of phase change about 72° across their apertures are designed and their ability to manipulate the reflected waves under normal incidence are investigated both by means of full-wave simulations and experimentally tested for validation. More than 6 dB of specular RCS reduction is achieved from about 66.5–78.2 GHz.

HELMHOLTZ INSTABILITY OF A VISCOUS COMPRESSIBLE PLASMA

1965 ◽  
Vol 43 (10) ◽  
pp. 1891-1903
Author(s):  
O. P. Bhutani ◽  
A. K. Sundaram
Keyword(s):  
Uniform Magnetic Field ◽  
Plane Boundary ◽  
Electrical Conductor ◽  
Helmholtz Instability ◽  
Compressible Plasma ◽  
Viscosity Parameter ◽  
Perfect Electrical Conductor ◽  
The Stability ◽  
Exchange Of Stability ◽  
Mode Technique

An attempt has been made to discuss the Helmholtz instability of a viscous compressible plasma considered to be a perfect electrical conductor. Initially, the plasma is assumed to be in contact with a uniform magnetic field along a plane boundary that is parallel to the field and is assumed to flow with uniform velocity V0 perpendicular to the field. By using the normal mode technique, the amplitudes of the perturbed quantities are obtained. The conditions for the validity of the principle of exchange of stability and overstability are obtained also. Finally, the growth-rate curves for different values of the viscosity parameter λ′ have been drawn and it has been found that the effect of viscosity adds to the stability of the system.

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