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This paper proposed a high efficient parallel scheme of method of moment (MOM) with RWG basis function to examine the far-field characteristics of electrically large antenna array used for target location. The antenna array is composed of three millimeter-wave conical antennas, which are symmetrically arranged on a spherical surface and geometrically focus on a point far away. Each antenna unit is...
Simulating laser ablation on an atomistic scale is a demanding task which requires millions to billions of atoms for sample sizes in the nano- to micrometer range.
Next generation solar energy converters rely on a combination of principles involving optics, thermodynamics, and device physics. To aid in the experimental design, it is often necessary to develop theoretical and computational models to guide the research. For traditional solar cells, standard computational packages are available; however, for more advanced designs incorporating sub-wavelength optical...
This paper addresses an accurate CAD oriented integrated closed-form model for the computation of losses for planar and non-planar slotline on a finite-thickness multilayered dielectric substrates. The analysis of the structures has been done using conformal mapping and single layer reduction (SLR) technique. The validity of the proposed integrated model is tested over wide range of parameters: 1...
The volume integral equation (VIE) formulations have been very accurate and efficient methods in modeling of inhomogeneous objects in electromagnetic areas. Over the years, various volume integral equation formations have been developed. In these formulations, the dielectric object is discretized into small sub-domains, such as tetrahedrons. Then basis functions are defined in each sub-domain and...
In this paper, a EM simulation modeling method for the two dimensional time varying sea surface microwave propagation is proposed. It is not only the electromagnetic simulation model, but also is a statistical analysis model of rough sea surface channel. Firstly, PM spectrum, Fourier transformation and Creamer transformation are adoped together to build typical linear and nonlinear sea surface models...
In this work, the nonlinear response from metallic metamaterials is characterized by a finite-difference time-domain solution to the Maxwell-hydrodynamic equations. The spatial locations of E-fields (and electric currents) are interleaved with that of magnetic fields. The electron charge is at the center of Yee grids. The current continuity equation connects Maxwell and hydrodynamic equations. For...
This paper is to present a new numerical method which can be used in computational electromagnetics in microwave remote sensing of random discrete medium embedded with irregular shape of scatterers. Current Radiative Transfer (RT) theoretical modeling is normally used to simulate wave propagation in the medium and wave scattering by basic shapes of scatterers, e.g., cylinder, disk, needle or sphere...
Although electromagnetic inverse problems are, as is canonically understood, ill-posed mathematical problems, there are several possibilities that arise with respect to the practical design of the imaging system with which scattered field data is collected that can ameliorate the problem and significantly improve the imaging performance. The standard techniques for dealing with the ill-posedness of...
Marine controlled-source electromagnetics (MCSEM) has been used by industry as a geophysical tool for de-risking marine hydrocarbon exploration since early of this century. At present, MCSEM has been applied successfully to identify the presence of hydrocarbon reservoirs in deep water regions. But it is hard to apply MCSEM to shallow water regions, because the air wave interacts with the electromagnetic...
When using the Method of Moment (MoM) and MLFMA to calculate the scattered field of the perfect electric conductors (PEC), it is hard to calculate monostation RCS in case of the targets with electrically extreme large size. In this paper, an efficient numerical modeling method of monostation RCS for electrically extreme large PEC targets has been proposed based on the phase extracted basis functions...
Parameter estimation of linear regression models usually employs least squares (LS) and maximum likelihood (ML) estimators. While maximum likelihood remains one of the best estimators within the classical statistics paradigm to date, it is highly reliant on the assumption about the joint probability distribution of the data for optimal results. In this paper we use the Generalized Method of Moments...
Microwave (MW) energy is becoming the most environment-friendly heating method for chemical synthesis because of higher yields and shorter reaction times. In general, efficient and effective chemical reactions start from ground-state molecules that are interacting bindingly via van der Waals and Coulombic interactions. On the other hand, molecular modeling based onmolecular mechanics (MM) and quantum...
This paper describes large-scale full-wave analyses of electromagnetic fields using numerical human body models. Recently, medical equipment using electromagnetic fields including hyperthermia is spreading. During treatment, it is effective to focus the electromagnetic field onto the lesions inside the human body. The purpose of this research is to accurately calculate the electromagnetic field inside...
The investigation of scattering characteristics of complex electromagnetic (EM) problems are of great interest in the computational electromagnetics domain in the past decades due to their extensive applications. Complex electromagnetic (EM) problems include electriclarge or complicated electromagnetic structures and complex materials, such as cloaks, perfect lens, ferrites and meta materials, etc‥...
Low-frequency computational electromagnetics (CEM) solvers play an important role in the simulation and advanced modeling for the static/quasi-static field. It can not only capture both inductive and capacitive physics for the circuit design, but also the weak coupling between the electric and magnetic fields. Especially for the modeling with nanometer-scaled objects, the low-frequency CEM (full-wave)...
Planar quasi-periodic arrays are widely used in many electromagnetic devices, such as reflectarray antennas, metasurfaces, nano particle arrays, and etc‥ They can be modeled as elements with geometrical control parameters located at periodic locations. Modeling quasi-periodic arrays are more challenging compared with periodic arrays. The entire array is required during the modeling process due to...
Space borne atmospheric remote sensing missions using combined passive microwave (MW) and infrared (IR) sensors take the advantage of high spatial and vertical resolution and the broad spectral sensitivity (to a variety of geophysical parameters) of the modern infrared sounders, and the superior ability of microwaves to penetrate many cloud types. The cloud-clearing algorithm, a commonly used algorithm...
A simple and quick model is explored to analyze the radiation of the pigtail-terminated coaxial cable in this paper. Unexpected radiated electromagnetic interference is produced due to the pigtail and influences the surrounding equipment. To study the mechanism of the pigtail effect, the actual pigtail connection is modeled as two transmission lines cascade connection. The currents on the transmission...
Technology of modern communication and channel estimation cannot be separated from the research on electromagnetic problems of the sea surface. Considering the cost and other factors, the electromagnetic simulation method is a very valuable research project. FDTD method can be applied to various electromagnetic problems very well, but when dealing with electrically large problems, there will be a...
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