Title :
Gaussian Beam-Based Hybrid Method for Quasi-Optical Systems
Author :
Rohani, Arash ; Chaudhuri, Sujeet K. ; Safavi-Naeini, Safieddin
Author_Institution :
P&P Opt., Inc., Waterloo, ON, Canada
Abstract :
A hybrid method for analysis of electromagnetic propagation in passive quasi-optical or unbounded wave structures is presented. This method is a combination of Gaussian beam tracing (GBT), Gabor expansion, and the finite-difference time-domain method (FDTD). The input to a system is first expanded into a sum of Gaussian beams (GBs) using the Gabor expansion. The resultant GBs are launched inside the system and tracked/traced using the GBT. For structures where GBT is no longer applicable, the GBs form the input of an FDTD routine. The output of the FDTD can further be expanded using Gabor expansion, and the resultant beams can be propagated through the system.
Keywords :
Gaussian processes; electromagnetic wave propagation; finite difference time-domain analysis; FDTD; GBT; Gabor expansion; Gaussian beam tracing; Gaussian beam-based hybrid method; electromagnetic propagation; finite-difference time-domain method; passive quasioptical structure; unbounded wave structure; Apertures; Finite difference methods; Lattices; Mathematical model; Surface waves; Time domain analysis; Finite-difference time domain (FDTD); Gabor expansion; Gaussian beams; Hybrid methods; quasi-optical systems;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2165467
