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In this paper, a novel inverse-based multifrontal block incomplete LU preconditioner is proposed, which is derived from the complete multifrontal method and the inverse-based dropping strategy. The new preconditioner is used to solve the large-scale complex unsymmetrical linear systems arising from the 3-D finite-element (FE) eigenvalue analysis of lossy slow-wave structures (SWSs) of traveling-wave...
A novel multifrontal block incomplete LU preconditioner (MFBILU) for large-scale complex unsymmetric linear generalized eigenvalue problems (GEPs), which are formed by the 3D finite-element (FE) eigenvalue analysis of lossy slow-wave structures (SWSs) of traveling-wave tubes (TWTs). We organized it with the p-type multigrid preconditioner (PMP) and obtained a novel mixed high efficient preconditioner...
Recent advances of TWTCAD Integrated Framework, a 2D modeling and simulation code suite for traveling wave tube, will be presented. The use of the suite is more convenience, and the simulation result is more accurate. All modules of TWTCAD are improved. TWTCAD is applying and validating in microwave industry broadly.
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