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In this paper, we present the extension of a recently published two-frequency continuous-wave (CW) ultra-high-frequency RF identification ranging technique to multiple carriers. The proposed system concept relies on exact phase information; hence, the passive tag cannot be accurately modeled as a frequency-flat linear device. A linearized model of the tag's(More)
UHF RF indentification systems integration into existing processes is a major challenge for trading companies and retailers. The installation of antennas and interrogators and the portal configuration for achieving a required read rate is difficult, and in most cases, sub-optimally implemented. Therefore, it is essential to understand the relationship(More)
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