用于能量收集的低功率宽带宽输入整流器

本文提出了一种具有宽动态输入功率范围的宽带整流器,主要用于低输入功率条件。提出的整流器利用肖特基二极管的单向导电性和并联型电路拓扑结构进行整流。在提出的结构中,采用了由两级微带线和匹配电感组成的宽带阻抗匹配网络,以减少失配损耗,并在工作范围内实现高射频到直流的功率转换效率(PCE)。其中匹配电感是为了抵消二极管的电容。提出的整流器被设计、优化、仿真、制造和测试。测试结果与仿真结果非常吻合。在输入功率范围为-1～10 dBm,带宽为1.8～2.8 GHz(相对带宽为43.4%)的情况下,PCE大于50%。此外,在输入功率为10 dBm时,PCE峰值为76.4%。与以前的类似工作相比,本文提出的整流器工作于最低的功率水平,使其在射频能量收集的发展中具有重要的应用前景。

Low power broadband rectifier with wide dynamic input power range for RFEH

This paper proposes a broadband rectifier with wide dynamic input power range, which is mainly used in low input power condition. The proposed rectifier uses unidirectional conductivity of Schottky diodes and a parallel-type circuit topology for rectification. In the proposed structure, a broadband impedance matching network consisting of a two stage microstrip lines and a matching inductance are adopted to reduce the mismatch loss and achieve high radio frequency (RF) to DC power conversion efficiency (PCE) over the operating range, where the matching inductance is to offset the capacitance of the diode. The proposed rectifier is designed, optimized, simulated, fabricated and measured. The measured results agree well with the simulations. With an input power range of -1~10 dBm and a bandwidth of 1.8~2.8 GHz (fractional bandwidth of 43.4%), the PCE is greater than 50%. Besides, a peak PCE of 76.4% is obtained at an input power of 10 dBm. Comparing with previous similar work, this proposed rectifier operates at the lowest power level, making it amazing in the development of RF-harvesting.