This article presents the multiband asymmetric radio frequency (RF) to direct current (DC) converter circuit for the wireless power transfer (WPT) applications. The proposed circuit is composed of a power divider, novel asymmetric multiband matching circuit and RF Schottky diode quadrupler voltage rectifier circuit. Unlike the conventional narrow band quadrupler using two Greinacher cells with opposite polarities, the proposed circuit aims to cover the multifrequency bands, which are the cell phone 1.8–2.1 GHz, the industrial, scientific, and medical (ISM) bands 2.4–2.5 GHz and 5.725–5.875 GHz. The interested RF input power range of −10 to 20 dBm for the WPT application is focused. The measured RF‐to‐DC conversion efficiency (η) of 50–65% at 1.8–2.1 GHz, 65% at 2.45 GHz and 16% at 5.8 GHz are obtained at 10 dBm optimal input power.

中文翻译：

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用于无线电力传输的多频带非对称射频到直流转换器电路

本文介绍了用于无线功率传输（WPT）应用的多频带非对称射频（RF）到直流（DC）转换器电路。该电路由功率分配器，新颖的非对称多频带匹配电路和射频肖特基二极管四倍频电压整流器电路组成。与使用两个极性相反的Greinacher电池的常规窄带四倍频器不同，拟议的电路旨在覆盖多频段，即1.8-2.1 GHz的手机，2.4-2.5 GHz的工业，科学和医学（ISM）频段以及5.725–5.875 GHz。针对WPT应用的感兴趣的RF输入功率范围为-10至20 dBm。测得的RF到DC转换效率（η在10 dBm最佳输入功率下，在1.8-2.1 GHz时为50-65％，在2.45 GHz时为65％，在5.8 GHz时为16％）。