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The electrostatically controlled deployable membrane antenna (ECDMA) is a promising structure with many outstanding advantages, such as low surface density, large aperture and high surface precision. However, it is a huge challenge to describe the coupled structural-electrostatic filed between the membrane and electrode accurately. This paper applied nonlinear finite element method and the virtual...
Based on high order hierarchical vector function, the finite-element time-domain (FETD) method combined with tearing and interconnecting (TI) algorithm is presented. This method is efficient for time domain analysis of substrate integrated waveguide (SIW) structures, since the SIW structures have a lot of fine via holes. By means of the high order hierarchical vector function, the accuracy and ability...
In this paper, an unconditionally stable implicit FETD algorithm combined with the FETI method is described. The method is general enough for arbitrary geometries, and yet capable of taking advantage of periodicity. Together with the first-order ABC, the method is applied to simulate the microstrip EBG structure. Through the periodicity of this structure, memory requirements are further reduced without...
Based on the finite element approximation and nonoverlapping domain decomposition, an efficient parallel algorithm of the finite-element time-domain method is presented for the analysis of the photonic band gap structure. The unconditionally stable implicit Newmark-beta scheme is used in the time domain finite-element tearing and interconnecting algorithm. Through the use of Lagrange multipliers,...
Two mass lumping techniques are applied to time-domain finite-element method (TDFEM) based on the vector wave equation in order to avoid solving sparse linear system at each time step. One is the Lacoste method and the other is a new technique based on local affine coordinate system while considering constant fields in an element. Cavity structures are simulated. And the comparison of the two mass...
The first order impedance boundary condition (the first order ABC) is implemented to terminate the perfectly matched layers (PMLs) in the time-domain finite-element (TDFE) simulation of electromagnetic problems. The formulation is validated by the numerical simulation of three-domain waveguide problem. The numerical results show clearly that the PMLs backed with the first order impedance boundary...
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