On Realized Gain-Optimal Feeding Coefficients of Antenna Arrays

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Conference article in proceedings
Date
2023
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en
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17th European Conference on Antennas and Propagation, EuCAP 2023, Proceedings of the European Conference on Antennas and Propagation
Abstract
The feeding coefficients maximizing the realized gain are often solved from an eigenvalue problem. We derive an alternative method for obtaining the optimal feed coefficients in this paper and show that it gives the same solution. The derived method obtains the coefficients from a direct equation. We compare the realized gain obtained with the optimal feeding coefficients to the case where the elements are progressively phased. The examples show that with optimal feeding coefficients the realized gain can be improved in cases where the mutual coupling is high, edge-element effect is strong, or the embedded element patterns are unequal. Also, an example demonstrates that circularly polarized realized gain can be improved in dual polarized array by feeding the elements with optimal coefficients.
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Funding Information: ACKNOWLEDGMENT This work was supported by the Business Finland through ENTRY100GHz CELTIC-NEXT project. Publisher Copyright: © 2023 European Association for Antennas and Propagation.
Keywords
antenna arrays, beam steering, beamforming, feeding coefficients
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Citation
Salmi , A , Lehtovuori , A & Viikari , V 2023 , On Realized Gain-Optimal Feeding Coefficients of Antenna Arrays . in 17th European Conference on Antennas and Propagation, EuCAP 2023 . IEEE , European Conference on Antennas and Propagation , Florence , Italy , 26/03/2023 . https://doi.org/10.23919/EuCAP57121.2023.10133706
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