Long-Range FM Backscatter Tag With Tunnel Diode

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Abstract
In this letter, we design and implement a long-range FM band backscatter tag amplifier with the tunnel diode. This tag has not only low power consumption but also a longer backscatter distance compared with the traditional FM backscatter tag. Our designed amplifier achieved a 23-dB gain over bandwidth between 88 and 108 MHz with a power consumption of only $90~\mu \text{W}$ . According to our field test, our tunnel diode-based FM tag can achieve the 20-m communication range under FM signal strength of −50 dBm, which is much longer than the traditional FM backscatter tag.
Funding Information
  • Fundamental Research Funds for the Central Universities
  • National Nature Science Foundation of China (61303222)

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