In this paper, a new structure of power divider (PD) employing zero-degree transmission line (TL) with arbitrary power dividing ratio is firstly proposed. Detailed analysis is performed according to the modified even- and odd-mode analytical method. This procedure shows that the resistor between the two output ports corresponds to the wide isolation band, while the other two grounded resistors can not only realize the two output ports matching, but also provide better power handling capability in comparison with the conventional Wilkinson PD. Specifically, a zero-degree composite right- and left-handed (CRLH) transmission line (TL) is used in the PD structure, which results in a smaller size, higher design flexibility, and wider operating band than the conventional Gysel PD with the reference of 10-dB return loss and 1-dB insertion loss. Closed-form design equations are derived, and the proposed design theory is verified by two PDs with the same centre frequency but different power dividing ratio (P₂/P₁) as 1:1 and 2:1, respectively. According to the experiment results, both PDs have a better out-of-band rejection than the conventional Wilkinson PD, more than 100% fractional operating bandwidth under full port matching, and more than 85% isolation bandwidth with the reference of 15-dB S₃₂.

本文首先提出了一种新的功率分配器（PD）结构，该结构采用具有任意功率分配比的零度传输线（TL）。根据修改后的偶模和奇模分析方法进行详细分析。该过程表明，两个输出端口之间的电阻器对应于较宽的隔离带，而其他两个接地电阻器不仅可以实现两个输出端口的匹配，而且与常规的Wilkinson PD相比，具有更好的功率处理能力。具体来说，PD结构中使用了零度右手和左手复合（CRLH）传输线（TL），与传统的Gysel PD相比，它具有较小的尺寸，更高的设计灵活性和更宽的工作频带。参考10 dB回波损耗和1 dB插入损耗。₂ / P ₁）分别为1：1和2：1。根据实验结果，两个PD的带外抑制均比常规的Wilkinson PD更好，在全端口匹配条件下，分数工作带宽大于100％，以15dB S为基准，隔离带宽大于85％₃₂。