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.

中文翻译：

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基于定向滤波器的两波束天线阵列宽带馈电网络

摘要 已经提出了一种设计用于双波束天线阵列的馈电网络的替代方法，该方法可确保在非常宽的频率范围内确保类似的辐射方向图。所提出的概念基于用于平滑改变两个宽带辐射元件的激励信号的定向滤波器和用于确保天线阵列的两个相同部分之间的正交激励的宽带定向耦合器。所提出的概念已通过在频率比 fH /fL ≈ 2:1 和 3:1 下运行的两波束天线阵列的测量得到证实。