Title :
Truncation Diffraction Phenomena of Floquet Waves Radiated From Semi-Infinite Phased Array Antenna in a General Focus Problem
Author_Institution :
Dept. of Commun. Eng., Yuan Ze Univ., Chungli, Taiwan
Abstract :
This paper presents uniform formulations of radiation mechanisms, analogous to the ray decompositions of diffraction theory, from a semi-infinite and periodic array of antennas. The antenna array is excited to radiate the electromagnetic (EM) fields focused at a relatively arbitrarily selected location. The ray decomposition results from a closed-form formulation by asymptotically evaluating the radiation integral of Floquet modes that are obtained by applying the Poisson sum formula to the summation of elemental radiations. The analysis is relatively general and will reduce to the case of a conventional phased array antenna that is excited to radiate directive beams focused in the far zone, and exhibits consistent phenomena. Theoretical investigations as well as numerical examinations are presented to demonstrate the radiation mechanisms.
Keywords :
antenna phased arrays; antenna radiation patterns; electromagnetic waves; stochastic processes; EM fields; Floquet modes; Poisson sum formula; closed-form formulation; diffraction theory; electromagnetic fields; elemental radiations; floquet waves radiation; general focus problem; radiation integral; radiation mechanisms; ray decomposition; semiinfinite phased array antenna; truncation diffraction phenomena; uniform formulations; Apertures; Arrays; Diffraction; Electron tubes; Phased arrays; Electromagnetic radiation mechanism; Floquet modes and general field focus; Poisson sum formula; phased antenna array;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2318331