一种低功耗射频能量采集系统的仿真与分析

doi:10.16180/j.cnki.issn1007-7820.2023.06.008

摘要/Abstract

摘要：

针对传统射频能量采集系统中RF-DC转换效率偏低的问题,文中设计了一种在入射功率为5~10 dBm范围内转换效率整体大于50%的低功耗射频能量采集系统。该方法在单阶Villard整流倍压电路结构的基础上将倍压阶数增加到七阶,有效提高了系统的输出电压和输出功率,从而提升了系统的转换效率。通过ADS射频软件对系统进行了总体设计与仿真,当回波损耗S₁₁参数满足设计要求后,将电路导入Altuim Designer中进行实物制作,在不同入射功率下测量系统负载电阻的输出电压,并计算得到对应功率下的整流转换效率。仿真结果与实验数据表明,系统在入射功率为5~10 dBm的范围内,整体整流转换效率可达50%以上,在10 dBm处得到最大转换效率为54.1%。与相同频点的射频能量采集系统相比,在设有同级别负载电阻和输入功率的条件下,文中所设计系统具有更高的输出电压,提升了RF-DC的转换效率。

关键词: 射频能量采集, 转换效率, 低功耗, Villard, ADS, 回波损耗, 入射功率, 输出电压

Abstract:

In view of the low conversion efficiency of RF-DC in traditional radio frequency energy acquisition system, a low power radio frequency energy acquisition system with an overall conversion efficiency greater than 50% in the range of 5~10 dBm incident power is designed in this study. Based on the single-stage Villard rectifier voltage doubling circuit structure, the doubling order is increased to seven, which effectively improves the output voltage and power of the system, thus improving the conversion efficiency of the system. The system is designed and simulated by ADS radio frequency software. When the parameters of echo loss S₁₁ meet the design requirements, the circuit is imported into Altuim Designer for physical production. The output voltage of the system load resistance at different incident powers is measured, and the rectifier conversion efficiency at corresponding powers is calculated. The simulation results and experimental data show that the overall conversion efficiency of the system can reach more than 50% when the incident power is 5~10 dBm, and the maximum conversion efficiency is 54.1% when the incident power is 10 dBm. Compared with the radio frequency energy acquisition system at the same frequency point,the system designed in this study has a higher output voltage under the condition of the same level of load resistance and input power, which improves the conversion efficiency of RF-DC.

Key words: RF energy acquisition, conversion efficiency, low power consumption, Villard, ADS, return loss, incident power, output voltage

中图分类号:

TN82

李帅,杨健,王涛,黄鑫,麻士峰. 一种低功耗射频能量采集系统的仿真与分析[J]. 电子科技, 2023, 36(6): 50-56.

LI Shuai,YANG Jian,WANG Tao,HUANG Xin,MA Shifeng. Simulation and Analysis of A Low Power RF Energy Acquisition System[J]. Electronic Science and Technology, 2023, 36(6): 50-56.

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