This paper describes a proposed solution for the diffraction problem related to a plane wave incident on a semi-infinite periodic structure, representative of a given distribution of equal microstrip patches. It belongs to the set of the uniform asymptotic Physical Optics solutions and allows one to account for the edge effects in the design of microstrip reflectarrays. The non-diagonal matrix related to the specular direction of reflection is considered in the Physical Optics approximation of the equivalent electric and magnetic surface currents induced on the illuminated face of the truncated structure. Such current densities are inserted in the expression of the radiation integral and the diffracted field is evaluated by performing a uniform asymptotic evaluation of the resulting integral.
A UAPO diffraction contribution to take into account the edge effects in microstrip reflectarrays
FERRARA, Flaminio;GENNARELLI, Claudio;GUERRIERO, ROCCO;RICCIO, Giovanni;
2006-01-01
Abstract
This paper describes a proposed solution for the diffraction problem related to a plane wave incident on a semi-infinite periodic structure, representative of a given distribution of equal microstrip patches. It belongs to the set of the uniform asymptotic Physical Optics solutions and allows one to account for the edge effects in the design of microstrip reflectarrays. The non-diagonal matrix related to the specular direction of reflection is considered in the Physical Optics approximation of the equivalent electric and magnetic surface currents induced on the illuminated face of the truncated structure. Such current densities are inserted in the expression of the radiation integral and the diffracted field is evaluated by performing a uniform asymptotic evaluation of the resulting integral.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
