Wideband Simulations of Periodic Structures by the Hybrid Spectral FDTD/TD-VFz Method

Samuel Gaucher (1) , Christophe Guiffaut (2) , Alain Reineix (2) , Olivier Cessenat (3) , Genevieve Maze-Merceur (3)

1 XLIM-SRF - Systèmes RF
2 XLIM - XLIM
3 CESTA - Centre d'études scientifiques et techniques d'Aquitaine

The Spectral FDTD (SFDTD) method is combined with the discrete-time time-domain vector fitting algorithm (TDVFz) to analyze 3D periodic structures excited by oblique incident plane waves over a wide frequency band. The time signal reconstruction with TD-VFz produces an untruncated response over an infinite time window allowing an accurate spectral result, specially near the cut-off frequency separating the spectrum propagating wave region of evanescent wave region

Mots clés: periodic boundary condition; finite-difference time-domain; oblique incidence; Spectral FDTD; time-domain vector fitting.

Domaines: Sciences de l'ingénieur [physics]; Electromagnétisme; Sciences de l'ingénieur [physics]; Traitement du signal et de l'image [eess.SP]

Samuel Gaucher, Christophe Guiffaut, Alain Reineix, Olivier Cessenat, Genevieve Maze-Merceur. Wideband Simulations of Periodic Structures by the Hybrid Spectral FDTD/TD-VFz Method. IEEE Antennas and Wireless Propagation Letters, 2022, 21 (5), pp.933-937. ⟨10.1109/LAWP.2022.3152410⟩. ⟨hal-03668219⟩