This letter presents a new microstrip line-phased array using $3 \times 3$ Nolen matrix – with three inputs and three output ports. For each input port excitation, the signal is divided into three equal magnitudes and unique progressive phase shifts at its output ports. The proposed microwave network is composed of three 180° couplers with two of them having identical coupling factors and two microstrip line-phase shifters. To verify the proposed design concept, a prototype of the feeding network working at 5.8 GHz is designed, fabricated, and measured. Both simulation and measurement results are in good agreement with the theoretical prediction.

中文翻译：

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使用 180° 耦合器由 Nolen 矩阵馈电的对称光束相控阵

这封信展示了一个使用 $3 \times 3$ Nolen 矩阵的新型微带线相控阵列 – 具有三个输入和三个输出端口。对于每个输入端口激励，信号在其输出端口被分成三个相等的幅度和独特的渐进相移。建议的微波网络由三个 180° 耦合器组成，其中两个具有相同的耦合因子和两个微带线移相器。为了验证所提出的设计概念，设计、制造和测量了一个工作在 5.8 GHz 的馈电网络原型。模拟和测量结果都与理论预测非常吻合。