Broadband feeding networks based on directional filters for two-beam antenna arrays

Kamil Staszek, Slawomir Gruszczynski and Krzysztof Wincza

Journal of Electromagnetic Waves and Applications, 2020, vol. 34, issue 9, 1300-1307

Abstract: An alternative approach for the design of feeding networks designated for two-beam antenna arrays that ensure similar radiation patterns in a very broad frequency range has been proposed. The presented concept is based on directional filters that are utilized for smooth change of excitation signals of two broadband radiating elements and a broadband directional coupler used for ensuring quadrature excitations between two identical parts of the antenna arrays. The proposed concept has been confirmed by measurements of two-beams antenna arrays operating in frequency ratio fH/fL ≈ 2:1 and 3:1.

Date: 2020
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DOI: 10.1080/09205071.2019.1657964

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