منابع مشابه
Impedance Matching for RFID Tag Antennas
Passive UHF RFID tag consists of a microchip attached to an antenna. Proper impedance match between the antenna and the chip is crucial in RFID tag design. It directly influences RFID tag performance characteristics such as the read range. It is known that an RFID microchip is a nonlinear load whose complex impedance varies with the frequency and the input power. We investigate the effect of us...
متن کاملAntennas of RFID Tags
Radio Frequency Identification (RFID) is a rapidly developing technology which uses RF signals for automatic identification of objects. RFID system generally consists of three components: 1) A small electronic data carrying device called a transponder or tag that is attached to the item to be identified, 2) A reader that communicates with the tag using radio frequency signals, 3) A host data pr...
متن کاملMulti-tag RFID systems
Successful object identification is the primary objective of Radio Frequency Identification (RFID) technology. Yet, a recent major study by Wal-Mart has shown that object detection probability can be as low as 66%. We propose the tagging of objects with multiple tags to address the fundamental issue of object detectability. We show that this strategy dramatically improves the efficacy of RFID s...
متن کاملRFID Tag Ownership Transfer
In some applications, the bearer of a radio frequency identification (RFID) tag might change, with corresponding changes required in the RFID system infrastructure. We survey the security requirements for RFID tag ownership transfer, and propose novel authentication protocols for tag ownership and authorisation transfer. The proposed protocols satisfy most of the requirements that we present, a...
متن کاملRFID tag detector model
The objective of this paper is to derive the channel transition probabilities for the reader–to–tag link in RFID, considering the peculiar receiver structure in a RFID tag. The model is a first necessary step to derive Maximum Likelihood receivers and also the Shannon capacity of the link.
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ژورنال
عنوان ژورنال: IEICE Communications Society Magazine
سال: 2008
ISSN: 2186-0661
DOI: 10.1587/bplus.2008.7_51