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On the subzone phase correction of fresnel zone plate antennas
Author(s) -
Guo Y. J.,
Barton S. K.
Publication year - 1993
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650061505
Subject(s) - fresnel zone antenna , fresnel zone , phase (matter) , zone plate , optics , aperiodic graph , fresnel integral , fresnel number , mathematics , division (mathematics) , field (mathematics) , fresnel diffraction , physics , antenna (radio) , computer science , telecommunications , radiation pattern , slot antenna , arithmetic , quantum mechanics , combinatorics , diffraction , pure mathematics
Subzone phase correction is a practical technique to produce high‐efficiency Fresnel zone plate antennas. In this article a strict theory underlying the technique is presented. A closed‐form expression of the focal field for the subzone phase correcting Fresnel zone plate (FZP) illuminated by a plane wave is given first. The subzone division and the corresponding phase correction are then optimized to produce the maximum focal field intensity. To overcome the difficulty of placing many subzone phase shifters in the narrow outer full‐wave zones, an aperiodic subzone phase correction technique is proposed.