In this article, a balanced‐to‐balanced (BTB) ultra‐wide band (UWB) power divider (PD) is proposed, which can realize arbitrary power‐dividing ratio (PDR) with improved transmission bandwidth flatness. The proposed PD is primarily based on microstrip/slotline (MS) transition structures and parallel‐coupled three‐slotline structure. U‐type microstrip feed lines integrated with stepped‐impedance slotline resonators are adopted at the input and output ports, which make the differential‐mode (DM) responses independent of the common‐mode (CM) ones. Meanwhile, superior DM transmission and CM suppression are achieved intrinsically, thereby simplifying the design procedure significantly. By changing the distances between the coupled three slotlines, the PDR between the output ports is controllable. In order to verify the feasibility of the proposed design method, several prototype circuits of the proposed PDs with different PDRs are simulated and a prototype circuit with the 2:1 PDR is fabricated and measured. A good agreement between the simulation and measurement results is observed.

中文翻译：

---

基于三时隙线结构的具有任意功率分配比的BTB UWB功率分配器

本文提出了一种平衡至平衡（BTB）的超宽带（UWB）功率分配器（PD），它可以实现任意的功率分配比（PDR），并提高了传输带宽的平坦度。拟议的PD主要基于微带线/时隙线（MS）过渡结构和并行耦合的三时隙线结构。输入和输出端口采用与步进阻抗缝隙线谐振器集成的U型微带馈线，使差分模式（DM）响应独立于共模（CM）响应。同时，从本质上实现了出色的DM传输和CM抑制，从而大大简化了设计过程。通过改变耦合的三个时隙线之间的距离，输出端口之间的PDR是可控的。为了验证所提出设计方法的可行性，模拟了具有不同PDR的PD的几个原型电路，并制造和测量了具有2：1 PDR的原型电路。观察到仿真结果与测量结果之间的良好一致性。