Superdirective Linear Dipole Array Optimization

The theory of superdirective antenna arrays was discussed. The procedure for finding the excitation currents of fixed-geometry arrays, which maximizes the directivity, termed as superdirectivity, for a given direction and polarization, was described. The procedure was based on the solution of an eig...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2020-06, Vol.19 (6), p.902-906
Main Authors: Lonsky, Tomas, Kracek, Jan, Hazdra, Pavel
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna radiation patterns
Conductors
Current density
Dipole antennas
Dipoles
Directivity
Eigenvalues
Eigenvalues and eigenfunctions
Electric conductors
Geometry
Ground plane
Linear antenna arrays
Linear dipole array
Optimization
superdirectivity
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Summary:The theory of superdirective antenna arrays was discussed. The procedure for finding the excitation currents of fixed-geometry arrays, which maximizes the directivity, termed as superdirectivity, for a given direction and polarization, was described. The procedure was based on the solution of an eigenvalue problem including the directivity and matrices of normalized self- and mutual radiation intensities and normalized self- and mutual radiated powers of array elements. For examples of a linear dipole array located above a perfect electric conductor ground plane, this procedure was also combined with the optimization of the parameters of geometry of the array as a spacing of dipoles, or their height above the ground, for various number of dipoles in the array.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2020.2981533