In this article, a novel topology is proposed to design a class of power dividers with the simultaneous realization of wideband power division and port-to-port isolation. On the one hand, in order to achieve a wideband power dividing response, two wideband filtering branches, including multimode resonators and parallel-coupled lines, are formed to replace the quarter-wavelength impedance transformers in the Wilkinson power divider. On the other hand, two output ports are at first electrically connected in shunt, stretched by quarter-wavelength transmission lines and then shunt-connected via one resistor, aiming to achieve the highly desired wideband port-to-port isolation. After the theoretical analysis on frequency responses of power division and port-to-port isolation is carried out, a prototype power divider on the microstrip-line structure is designed and fabricated. Good agreement between the simulated and measured results is obtained, exhibiting an extremely wide operating band of 78% fractional bandwidth, over which 3 ± 0.3-dB power division and 17.5-dB port-to-port isolation have been simultaneously achieved.

中文翻译：

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具有宽带功率分配和端口到端口隔离的功率分配器的提议和设计：一种新的拓扑结构

在本文中，提出了一种新颖的拓扑结构来设计一类同时实现宽带功率分配和端口到端口隔离的功率分配器。一方面，为了实现宽带功分响应，形成两个宽带滤波支路，包括多模谐振器和并联耦合线，以取代威尔金森功分器中的四分之一波长阻抗变换器。另一方面，两个输出端口首先并联电连接，由四分之一波长传输线拉伸，然后通过一个电阻并联，旨在实现非常需要的宽带端口到端口隔离。在对功率分配和端口到端口隔离的频率响应进行理论分析后，设计并制作了微带线结构上的原型功率分配器。模拟结果和测量结果之间获得了良好的一致性，表现出 78% 分数带宽的极宽工作频带，在该频带上同时实现了 3 ± 0.3-dB 功率分配和 17.5-dB 端口到端口隔离。