一种低功耗2.4 GHz超外差接收器架构，具有外部LO，用于无线供电的反向散射标签和传感器

2017 IEEE International Conference on RFID (RFID) Pub Date : 2017-05-01 DOI:10.1109/RFID.2017.7945601

Joshua F. Ensworth, A. T. Hoang, M. Reynolds

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引用次数: 19

摘要

我们提出了一种低功耗超外差接收器架构，用于无线供电的反向散射标签和传感器。这种接收机架构通过利用外部连续波(CW)载波作为电源和本振源，消除了接收机耗电的本振(LO)。超外差中频(IF)来自定制设计的无源双端口混频器的输出，该混频器同时用作能量采集器。我们已经在2.4 GHz的桌面概念验证测试中验证了所提出的架构，通过成功接收和解码蓝牙低功耗(BLE)广告数据包，该数据包使用1 Mbps的GFSK调制。

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A low power 2.4 GHz superheterodyne receiver architecture with external LO for wirelessly powered backscatter tags and sensors

We present a low power superheterodyne receiver architecture for wirelessly powered backscatter tags and sensors. This receiver architecture eliminates the power hungry local oscillator (LO) from the receiver by leveraging an external continuous wave (CW) carrier as both power source and LO source. The superheterodyne intermediate frequency (IF) is obtained from the output of a custom designed passive two-port mixer which simultaneously serves as an energy harvester. We have validated the proposed architecture at 2.4 GHz in benchtop proof-of-concept testing by successfully receiving and decoding Bluetooth Low Energy (BLE) advertising packets, which use GFSK modulation at 1 Mbps.

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2017 IEEE International Conference on RFID (RFID)

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