Omnidirectional miniature RFID tag

Anna Mikhailovskaya*, Ildar Yusupov, Dmitry Dobrykh, Sergey Krasikov, Diana Shakirova, Andrey Bogdanov, Dmitry Filonov, Pavel Ginzburg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Radio frequency identification (RFID) is a widely used technology for contactless data readout. Numerous passive RFID tags are available on the market, and in a vast majority of cases, their designs are based on flat meandered dipole architectures. However, besides technological advantages, those realizations suffer from polarization mismatch issues and limited spatial sectors, from which flat tags can be interrogated. Here, we demonstrate and analyze a miniature omnidirectional tag accessible from all 4π stereo angles with a commercial RFID reader. Our design is based on exploring all three dimensions, which allows achieving close to perfect angular coverage by overlapping several multipole resonances of a structure. An optimized metal strip with a nontrivial geometry is wrapped on a high permittivity ceramic sphere for miniaturization purposes. As a result, a 3 cm device (tenths of an operational wavelength) is demonstrated to be readable from a 1.5 m distance without any dependence on the interrogation direction. Compact omnidirectional tags can remove hard restrictions on a mutual orientation between information holders and interrogating systems. Those capabilities are essential in many applications, including logistics, animal activity monitoring, and security, to name just a few.

Original languageEnglish
Article number033503
JournalApplied Physics Letters
Issue number3
StatePublished - 19 Jul 2021


FundersFunder number
European Research Council802279
Ministry of Science and Technology, Israel
Russian Science Foundation19-79-10232
PAZY Foundation


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