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A surface lumped circuit model is formulated for the discontinuous Galerkin time-domain modeling of devices with lumped elements. A leap-frog algorithm is used for time integration, resulting in an explicit and conditionally stable time-marching algorithm. A microstrip filter with four ports and two lumped elements is simulated to validate the proposed method.
An efficient algorithm based on the discontinuous Galerkin time-domain (DGTD) method with a hybrid mesh is proposed to simulate electromagnetic problems. To validate the algorithm and demonstrate its efficiency, a spherical cavity and a horn antenna are simulated using hybrid meshes.
In order to reduce the dispersion of the conventional HO-FDTD (2, 4) method, the axes-optimized method has been provided. This paper mainly discusses the optimization of the weight parameters based on the numerical dispersion equation. The numerical examples have been given to demonstrate the optimized HO-FDTD (2, 4) method. It has been found that the dispersion error can be eliminated in the axial...
A hybrid approach using null field (NFM) method and method of moments (MoM) is proposed to solve the radiation problem of a dipole antenna near a prolate head model. In the proposed approach, the electromagnetic fields in the prolate, which is used to emulate a human head, is modeled by NFM and the dipole antenna is analyzed by MoM. The mutual coupling between the dipole antenna and the head model...
The head of the user of a mobile telephone is modeled by a two-layered prolate excited by the near field of a patch antenna. A hybrid null field method/method of moments (NFM/MoM) numerical method is investigated in this paper. NFM is used to solve the scattering problem from the head model, and the MoM using the Rao-Wilton Glisson (RWG) basis functions is applied to model the dipole antenna by distributing...
Method of moments (MOM) is applied extensively in electromagnetics, but the impedance matrix from MOM is so dense that it will consume prohibitive time if using the direct solver. In this paper, we will sparse the MOM-matrix using discrete wavelets transform method (DWT), and take the Daubechies wavelets of order N = 3 for example, introducing the theory of DWT and the construction of the transformation...
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