Abstract
This paper studies tag properties for optimized tag-to-reader backscatter communication. The latter is exploited in RF identification (RFID) systems and utilizes binary reflection coefficient change of the tag antenna-load circuit. It is shown that amplitude maximization of complex reflection coefficient difference between the two states is not sufficient for optimized tag-to-reader backscatter communication, contrary to what is commonly believed in the field. We provide a general tag load selection methodology that applies to any tag antenna, including minimum scattering antennas as a special case. The method is based on tag antenna structural mode closed-form calculation (given three values of tag radar cross section), employs simple antenna/communication theory, and applies to both passive, as well as semipassive RFID tags.
Original language | English |
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Article number | 5458048 |
Pages (from-to) | 1502-1509 |
Number of pages | 8 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 58 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2010 |
Keywords
- Minimum scattering
- Receiver sensitivity
- RF identification (RFID)
- Structural mode