Broadband matrix-type feeding networks for two-beam antennas with constant beamwidth and efficient aperture utilization

Kamil Staszek, Szczepan Odrobina, Krzysztof Wincza and Slawomir Gruszczynski

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 2, 236-248

Abstract: We report a novel approach for the design of a Butler matrix-type feeding network that allows for achieving two-beam antenna arrays in a very broad frequency range. The proposed solution is based on a 2 × 4 frequency-selective beamforming network which changes its frequency characteristics across the bandwidth. The utilized network features three different properties at three different frequencies. Therefore, such a network allows for achieving two-beam radiation pattern with similar beamwidths and beam directions over 3:1 bandwidth in conjunction with four broadband radiating elements. The presented concept has been verified by the design and measurements of a two-beam antenna array operating in 1–3 GHz frequency range.

Date: 2019
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DOI: 10.1080/09205071.2018.1536565

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