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Non-homogeneous perfectly matched layers (PML) for the analysis of planar radiating structures with TLM method

A perfectly matched layer (PML) technique is used to limit the computational domain that includes planar structures and which are analyzed with the transmission-line matrix (TLM) method. The approach uses a coupling algorithm between the TLM symmetrical condensed node (SCN) in the computational domain and a finite-difference time-domain (FDTD) algorithm in the PML medium. The proposed procedure is validated by comparison with other methods and/or measurements in the case of a patch antenna fed by a microstrip line.