Title :
Analysis of electromagnetic scattering from doubly-periodic structures using a hybrid current model
Author :
Boag, Amir ; Leviatan, Yehuda ; Boag, Amir
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
Abstract :
A novel solution is presented for the problem of three-dimensional electromagnetic scattering of a time-harmonic plane wave from a piecewise homogeneous double-periodic structure. Sets of fictitious doubly-periodic properly modulated patches of magnetic current of cross polarization are used to simulate the fields in the homogeneous regions crossed by unit cell boundaries. The fields radiated by these patch-currents are represented in terms of Floquet modes. Sets of fictitious elemental electric dipoles of cross polarization are used to simulate the fields in the homogeneous regions completely enclosed within this cell. The complex amplitudes of the fictitious sources are adjusted to render the tangential components of the electric and magnetic fields continuous at selected sets of points on the boundaries between the regions within the unit cell. The method is applicable to doubly-periodic gratings composed of homogeneous regions of smooth, shape. Perfectly conducting boundaries can also be handled by this procedure
Keywords :
diffraction gratings; electromagnetic wave scattering; numerical analysis; Floquet modes; complex amplitudes; cross polarization; doubly-periodic gratings; electric fields; fictitious doubly-periodic properly modulated patches; fictitious elemental electric dipoles; homogeneous regions; hybrid current model; magnetic current; magnetic fields; perfectly conducting boundaries; piecewise homogeneous double-periodic structure; tangential components; three-dimensional electromagnetic scattering; time-harmonic plane wave; unit cell boundaries; Computational modeling; Electromagnetic analysis; Electromagnetic modeling; Electromagnetic scattering; Gratings; Integral equations; Magnetic modulators; Moment methods; Periodic structures; Polarization;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 1991. Proceedings., 17th Convention of
Conference_Location :
Tel Aviv
Print_ISBN :
0-87942-678-0
DOI :
10.1109/EEIS.1991.217717