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An overview of design requirements and novel approaches for improved performance UHF radio frequency identification (RFID) tags is presented. Two matching techniques, an inductively coupled structure and a serial stub structure are discussed. Different miniaturized antenna topologies are proposed, focusing on low-profile, high efficiency and high directivity in very compact (less than 3 in times 3...
In this paper, the design and development of a unique high read-range high-efficiency (95%) radio frequency identification (RFID) antenna for the 915 MHz UHF band is discussed. The RFID exceptional characteristics are investigated in terms of antenna-IC matching and radiation efficiency. This 915 MHz passive tag is a 3" times 3" omnidirectional tag and yielded a read range of 31 feet compared...
Inductively coupled RFID antennas in two different structures, namely arc-shape and dual-body configurations, are presented. High input resistance can be easily achieved with these structures to realize conjugate impedance matching with some tag chips. 1.99 dBi and 5.62 dBi directivities at 915 MHz are also observed
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