On Realized Gain-Optimal Feeding Coefficients of Antenna Arrays

Albert Salmi*, Anu Lehtovuori, Ville Viikari

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)
82 Downloads (Pure)


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.

Original languageEnglish
Title of host publication17th European Conference on Antennas and Propagation, EuCAP 2023
ISBN (Electronic)978-8-8312-9907-7
ISBN (Print)978-1-6654-7541-9
Publication statusPublished - 2023
MoE publication typeA4 Conference publication
EventEuropean Conference on Antennas and Propagation - Florence, Italy
Duration: 26 Mar 202331 Mar 2023
Conference number: 17


ConferenceEuropean Conference on Antennas and Propagation
Abbreviated titleEuCAP
Internet address


  • antenna arrays
  • beam steering
  • beamforming
  • feeding coefficients


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