The objective of this paper is to investigate the use of periodic artificial materials for shielding high-frequency high-impedance near fields produced by electric dipoles. The problem is handled numerically by applying the Array Scanning Method that reduces the problem of an aperiodic source close to a periodic screen to a superposition of phased-dipole-array problems (where the array periods are the spatial periods of the shield). As a result, the Floquet theory can be applied and the scattering problem is solved in the unit cell by means of a periodic space-domain Method of Moment, which employs the Ewald transformation to compute the involved Green's functions with accelerated performance. The exact solutions are compared with those derived by a spectral-domain approach with the use of homogeneous models and by the classical transmission-line approximation. ©2010 IEEE.
Analysis of the shielding performance of 2-D periodic screens against near sources / Araneo, Rodolfo; Lovat, Giampiero; Celozzi, Salvatore. - ELETTRONICO. - (2010), pp. 819-824. (Intervento presentato al convegno 2010 IEEE International Symposium on Electromagnetic Compatibility, EMC 2010 tenutosi a Fort Lauderdale, FL nel 25 July 2010 through 30 July 2010) [10.1109/isemc.2010.5711385].
Analysis of the shielding performance of 2-D periodic screens against near sources
ARANEO, Rodolfo;LOVAT, GIAMPIERO;CELOZZI, Salvatore
2010
Abstract
The objective of this paper is to investigate the use of periodic artificial materials for shielding high-frequency high-impedance near fields produced by electric dipoles. The problem is handled numerically by applying the Array Scanning Method that reduces the problem of an aperiodic source close to a periodic screen to a superposition of phased-dipole-array problems (where the array periods are the spatial periods of the shield). As a result, the Floquet theory can be applied and the scattering problem is solved in the unit cell by means of a periodic space-domain Method of Moment, which employs the Ewald transformation to compute the involved Green's functions with accelerated performance. The exact solutions are compared with those derived by a spectral-domain approach with the use of homogeneous models and by the classical transmission-line approximation. ©2010 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
