Simulation of Berenger's perfectly matched layer with a modified TLM node

Shape optimization of multi‐band antennas using the coupling between microgenetic algorithms and TLM method

“…Furthermore, during the last decade, some improvements have been done in order to strongly decrease the computational time of TLM method. By the use of parallel computing, Prony's method and a new TLM node for modelling PML layers, we have built an efficient TLM code which allows rigorous analysis of complex antennas with low CPU time [12]. Then, the coupling between TLM and an optimization process like GAs, which involves several hundred TLM computations, becomes now possible.…”

Extended PML‐TLM node: an efficient approach for full‐wave analysis of open structures

“…For this purpose, Pen a and Ney's approach is used [14]. This avoids time-step problems encountered in Reference [12], in which the procedure proposed by Jin and Valhdieck [15] is used. Since voltages were normalized with stub impedance, singularity problems arose in their de"nition at maximum time-step.…”

“…t. The originality in Reference [12] lies in the estimation of this last term. For this purpose, one has to de"ne 12 new voltages each corresponding to one sub-component of the "eld.…”

“…The new 3D SCN-PML node requires 32-voltages storage per cell in the general case. The second one, proposed by Dubard and Pompei is a complete PML-SCN requiring only 24-voltages storage per cell [12]. However, their algorithm cannot perform at maximum time-step.…”

Implementation of the stretched co-ordinate-based PML for waveguide structures in TLM

“…A uniform type of a twodimensional (2-D) TLM mesh, which can simulate usual and PML media at once, was developed [7]. A modified symmetrical condensed node (SCN) which allows direct Contract/grant sponsor: Korea Science and Engineering Foundation implementation of Berenger's PML in a three-dimensional (3-D) TLM method was proposed [8], and the PML efficiency in the 3-D SCN-TLM method was then extensively discussed in terms of the profile of numerical conductivity values [9]. The PML formulated for the SCN-TLM [8] was later extended to attenuate evanescent waves [10].…”