Abstract

This work presents a novel finite-element solution to the problem of scattering from multiple two-dimensional cavities in infinite metallic walls. The technique presented here is highly efficient in terms of computing resources and is versatile and accurate in comparison with previously published methods. The formulation is based on using the surface integral equation with the free-space Green’s function as the boundary constraint. The solution space is divided into local bounded frames containing each cavity. The finite-element formulation is applied inside each frame to derive a linear system of equations associated with nodal field values. The surface integral equation is then applied at the opening of the cavities to truncate the computational domain and to connect the matrix subsystem generated from each cavity. The near and far fields are generated for different single and multiple cavity examples. The results are in close agreement with methods published earlier.

© 2009 Optical Society of America

Electromagnetic scattering from multiple sub-wavelength apertures in metallic screens using the surface integral equation method

Babak Alavikia and Omar M. Ramahi
J. Opt. Soc. Am. A 27(4) 815-826 (2010)

Electromagnetic scattering from cylindrical objects above a conductive surface using a hybrid finite-element–surface integral equation method

Babak Alavikia and Omar M. Ramahi
J. Opt. Soc. Am. A 28(12) 2510-2518 (2011)

Electromagnetic scattering from finite and infinite array of two-dimensional overfilled cavities in a conductive surface using a hybrid finite element surface integral equation method

Babak Alavikia and Omar M. Ramahi
J. Opt. Soc. Am. A 29(11) 2444-2450 (2012)

Hybrid finite-element-boundary integral algorithm to solve the problem of scattering from a finite and infinite array of cavities with stratified dielectric coating

Babak Alavikia and Omar M. Ramahi
J. Opt. Soc. Am. A 28(6) 1022-1031 (2011)

Hybrid finite element-boundary integral algorithm to solve the problem of scattering from a finite array of cavities with multilayer stratified dielectric coating

Babak Alavikia and Omar M. Ramahi
J. Opt. Soc. Am. A 28(10) 2192-2199 (2011)