In this article, a type of multiport power divider is proposed based on the concept of epsilon-near-zero (ENZ) metamaterials. An arbitrarily shaped ENZ metamaterial comprising a dielectric impurity is connected to $N$ waveguides, and the incident power can be efficiently delivered to output waveguides, with transmitted fields being exactly equal in both amplitude and phase for output branches. Hence, the proposed power divider allows a balanced power allocation independent on its geometrical symmetry. This design philosophy can further be extended to generic dividers with arbitrary power division ratios by modifying the widths of the output waveguides. The experimental verification is carried out in waveguide-emulated ENZ structures. The fabricated eight-way equal-split divider is measured with an average insertion loss of 0.6 dB, a transmission amplitude imbalance of 0.7 dB, and a phase imbalance of 10°, over the 10-dB return-loss bandwidth from 5.35 to 5.56 GHz. The ten-way unequal-split divider with two different groups of outputs is also prototyped, providing a custom-designed power division ratio.

中文翻译：

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ñ使用Epsilon-Near-Zero-零超材料的端口均等/不等分功率分配器

在本文中，基于epsilon-near-zero（ENZ）超材料的概念，提出了一种多端口功率分配器。将包含电介质杂质的任意形状的ENZ超材料连接到 $ N $ 波导，并且入射功率可以有效地传递到输出波导，并且传输场的幅度和相位在输出分支上都完全相等。因此，所提出的功率分配器允许独立于其几何对称性的平衡功率分配。通过修改输出波导的宽度，该设计原理可以进一步扩展到具有任意功率分配比的通用分频器。实验验证是在波导仿真的ENZ结构中进行的。在5.35至5.56 GHz的10 dB回波损耗带宽上，以平均插入损耗为0.6 dB，传输幅度不平衡为0.7 dB，相位不平衡为10°来测量制造的八路均分分频器。 。还对具有两组不同输出的十路不等分分频器进行了原型设计，