This article presents a radio frequency (RF) rectifier with a wide incident angle of incoming waves, based on a rat-race coupler (RRC). Two identical sub-rectifiers replace the two load circuits of the conventional RRC. When compared with the previous Wilkinson power combiner (WPC)-based rectifier, the proposed topology advances with a smaller variation in power conversion efficiency (PCE) over the incident angle. In addition, it simplifies the matching network (MN) design and enables a lower input return loss due to the fully symmetric circuitry between 0° and 180°. Furthermore, it allows a higher design flexibility on the rectifier topology. For validation, we designed and fabricated two wide-angle rectifiers, one working at single band (2.45 GHz) and the other at dual band (0.9 and 2.4 GHz). The single-band rectifier achieved a 67.3% peak PCE and 7.9% efficiency variation within the 0°–360° incident angle range. For the dual-band rectifier, the peak PCE is 78.4% and 70.2%, while the variation is 4% and 8.8%, for 0.9 and 2.4 GHz, respectively. The PCE variation is the smallest among previous works.

中文翻译：

---

使用调压变压器优化风力发电厂的无功功率能力


本文介绍了一种基于环形耦合器 (RRC) 的具有宽入射波入射角的射频 (RF) 整流器。两个相同的子整流器取代了传统RRC的两个负载电路。与之前基于威尔金森功率组合器 (WPC) 的整流器相比，所提出的拓扑在功率转换效率 (PCE) 随入射角变化较小方面取得了进步。此外，它还简化了匹配网络 (MN) 设计，并由于 0° 至 180° 之间的完全对称电路而实现了较低的输入回波损耗。此外，它还允许整流器拓扑具有更高的设计灵活性。为了进行验证，我们设计并制造了两个广角整流器，一个在单频段（2.45 GHz）工作，另一个在双频段（0.9 和 2.4 GHz）工作。单带整流器在 0°–360° 入射角范围内实现了 67.3% 的峰值 PCE 和 7.9% 的效率变化。对于双频整流器，0.9 GHz 和 2.4 GHz 的峰值 PCE 分别为 78.4% 和 70.2%，而变化分别为 4% 和 8.8%。 PCE 变化是之前作品中最小的。