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RF-Powered Transceiver With an Energy- and Spectral-Efficient IF-Based Quadrature
本文介绍了一种5.8 GHz射频供电收发器,采用基于IF的正交反向散射技术,实现低功耗和高频谱效率。
2.5 Mb/s传输速率,113 µW功耗,0.6 V电源供电
射频供电收发器正交调制低功耗CMOS
▸创新点1:基于IF的正交反向散射技术(IFQB),通过中频信号实现正交调制,无需传统复杂的射频电路(如PLL和本地振荡器),显著降低功耗并支持高密度调制(如32-QAM)。
▸创新点2:完全无源射频电路设计,省略了传统收发器中的主动射频组件(如PLL、混频器和本地信号生成电路),仅依赖反向散射和能量采集技术,实现0.6V超低电压供电下的高效工作。
▸创新点3:集成化能量管理与通信系统,通过功率管理单元(PMU)实现射频能量采集与分配,支持收发器在极低功耗(113µW)下完成2.5Mb/s的高速数据传输,适用于物联网传感节点。
▸创新点4:实测验证的32-QAM调制能力,在5.8GHz频段下实现高谱效通信,并通过无线温度传感原型验证了技术的实用性与可靠性,为低功耗无线传感网络提供了新解决方案。
Abstract
This study introduces a 5.8 GHz RF-powered trans-
ceiver that includes a transmitte r using an IF-based quadrature
backscattering (IFQB) technique . The IFQB transmitter can pro-
duce a quadrature modulated signal without active RF circuits,
such as PLL, local generation, and local distribution circuits. Thus,
the IFQB technique can significantly reduce the power consump-
tion while achieving denser constellations by the quadrature mod-
ulation. The RF-powered transceiver consists of the IFQB tra