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Electrically small UHF RFID tag antenna based on an inductively coupled resonant LC tank

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Original languageEnglish
Title of host publicationProceedings of the 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019
Number of pages3
ISBN (Electronic)9781728135175
Publication statusPublished - 10 Dec 2019
Publication typeA4 Article in a conference publication
EventIEEE Asia-Pacific Microwave Conference - Singapore, Singapore, Singapore
Duration: 10 Dec 201913 Dec 2019


ConferenceIEEE Asia-Pacific Microwave Conference
Abbreviated titleAPMC
Internet address


We introduce two LC tank based electrically small UHF RFID tag antennas with a stacked configuration (0.04 lambdatimes 0.04 lambdatimes 0.02lambda) and a coplanar configuration (0.08 lambdatimes 0.04lambda). The method of using a resonant LC tank to minimize the antenna footprint is analysed with the antenna equivalent circuit and the electromagnetic simulations. The performance of the proposed antennas are verified in the wireless measurement with a maximum read range of 3.2 m and 2.5 m of the stacked and coplanar ones, respectively. The influence of antenna size on its performance is analysed with a parametric studies. The results indicate that the antennas feature a readily scalable size-performance ratio that makes it easy to adapt the tag according to different application requirements.

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