功率比可重构平衡耦合器

本文提出了一种功率比可重构平衡正交耦合器,宽功率比调节范围由两个可调电容实现。所有调节状态下的差模响应、共模抑制和差模-共模转化抑制同时实现。为验证,设计并加工了一个中心频率2 GHz的功率比可重构平衡耦合器,采用ZNBT8矢量网络分析仪测试S参数,测试结果与仿真结果吻合良好。测试功率比范围为-11.3~10.2 d B,所有状态下差模回波损耗和隔离度均大于15 dB。

This paper presents a tunable balanced quadrature coupler. The wide obtained by using two tuning capacitors. The differential-mode operation, power-dividing tuning range is common-mode rejection and cross-mode conversion suppression are realized for all tuning states. For verification, a 2 GHz balanced quadra- ture coupler with tunable power-dividing ratio is designed, fabricated and measured by ZNBT8 vector network analyzer. The measured results are in good agreement with the simulated ones. The measured results show that the differential power-dividing ratio can be tuned in a range of -11.3 - 10.2 dB with better than 15dB return loss and isolation.