Characteristic Modes of Dipole Arrays

The theory of characteristic modes is used to analyze antenna arrays. In particular, to study arrays of thin-wire dipoles backed by an infinite electric ground plane. The proposed theory is based on an analytically prescribed current distribution on the dipoles where, when compared with the full met...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2018-06, Vol.17 (6), p.998-1001
Main Authors: Lonsky, Tomas, Hazdra, Pavel, Kracek, Jan
Format: Article
Language:English
Subjects:
Antenna arrays
Characteristic modes (CM)
Current distribution
Dipole antennas
dipole array
Eigenvalues and eigenfunctions
Impedance
Method of moments
mutual impedance
Resonant frequency
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Summary:The theory of characteristic modes is used to analyze antenna arrays. In particular, to study arrays of thin-wire dipoles backed by an infinite electric ground plane. The proposed theory is based on an analytically prescribed current distribution on the dipoles where, when compared with the full method of moments solution, only a self- and mutual impedance matrix relating excitation currents and voltages of array elements is the subject for modal decomposition. Therefore, the impedance matrix of interest has dimension \times , where N is number of the array elements resulting in an extremely fast approach. The results of the proposed method are validated by a full-wave simulator and show good agreement.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2828986