Title :
Three-dimensional FDTD analysis of quasi-optical arrays using Floquet boundary conditions and Berenger´s PML
Author :
Alexanian, A. ; Kolias, N.J. ; Compton, R.C. ; York, R.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
3/1/1996 12:00:00 AM
Abstract :
Infinite periodic grid structures excited by normally incident beams are analyzed using finite-difference time-domain (FDTD), with Berenger´s PML (perfectly matched layer) absorbing boundary condition used to terminate the computation domain along the beam axis. Floquet boundary conditions are used to handle arbitrarily shaped unit cells. Restriction to normal incidence permits using a Gaussian pulsed excitation to generate the wideband frequency response. The technique is used to model a previously reported multilayer quasioptical rotator array, with excellent agreement to the measurements obtained in the 26.5-40 GHz hand in a lens-focused test setup
Keywords :
antenna theory; electromagnetic wave scattering; finite difference time-domain analysis; frequency response; millimetre wave antenna arrays; 26.5 to 40 GHz; 3D FDTD analysis; Berenger perfectly matched layer; EHF; Floquet boundary conditions; Gaussian pulsed excitation; MM-wave antenna arrays; absorbing boundary condition; infinite periodic grid structures; lens-focused test setup; multilayer quasioptical rotator array; normally incident beams; quasi-optical arrays; three-dimensional FDTD analysis; wideband frequency response; Boundary conditions; Finite difference methods; Frequency response; Grid computing; Nonhomogeneous media; Perfectly matched layers; Periodic structures; Pulse generation; Time domain analysis; Wideband;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
