This work presents a UWB balanced-to-unbalanced (BTU) power divider (PD) using coupled lines and an additional shunt TL in the middle. The even-mode and odd-mode ABCD parameters of BTU PD produce the required analytical design equations. Later, the use of stub-loaded coupled lines in the shunt transmission line enhanced the passband response. The structure is further optimised by varying the impedance and electrical length of the middle shunt transmission line. For verification, a prototype is simulated, fabricated and measured. The proposed BTU power divider occupies size of 0.36 × 0.52 $$\lambda_{g}^{2}$$ λ g 2 with 95.6% FBW. The measured results agree with the simulated results.

中文翻译：

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使用耦合线对 UWB 平衡到非平衡功率分配器建模

这项工作提出了一个 UWB 平衡到不平衡 (BTU) 功率分配器 (PD)，它使用耦合线和中间的附加分流器 TL。BTU PD 的偶模和奇模 ABCD 参数产生所需的分析设计方程。后来，在并联传输线中使用短线加载耦合线增强了通带响应。该结构通过改变中间分流传输线的阻抗和电气长度进一步优化。为了验证，原型被模拟、制造和测量。建议的 BTU 功率分配器占用 0.36 × 0.52 $$\lambda_{g}^{2}$$ λ g 2 的大小，FBW 为 95.6%。测量结果与模拟结果一致。