A Proximity Wireless Sensor Based on Backscatter Communication

被引:0
|
作者
Servent, Angel [1 ]
Daskalakis, Spyros [2 ]
Collado, Ana [2 ]
Georgiadis, Apostolos [2 ]
机构
[1] Univ Politecn Cataluna, Sch Engn Telecommun & Aerosp Castelldefels, Castelldels 08860, Bsrcelona, Spain
[2] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland
基金
欧盟地平线“2020”;
关键词
RFID; power decteor; antenna based sensor; proximity sensor; IoT;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A proximity sensor is designed as an antenna-based sensor, operating at 2.4 GHz. The operating principle relies on the fact that when an object approaches an antenna, it affects its radiation properties and its input impedance. A diode power detector is used to sense the antenna input impedance variation as a reflected wave at the input terminals of the antenna. The detector output analog dc voltage is read using an analog-to-digital (ADC) of a low power microcontroller and subsequently it is conveyed back to a reader using UHF backscatter communication based on the WISP architecture.
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页数:2
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