RF ID tag device
作者： Kunio Sawaya , Hitoshi Kitayoshi
DOI:
关键词: Electrical engineering 、 Ask price 、 Electrical impedance 、 Rectification 、 Engineering 、 Qpsk modulation 、 Electronic engineering 、 Bpsk modulation 、 Radio frequency 、 Stub (electronics)
摘要: The present invention aims to overcome the drawback with conventional RFID tag devices having a short communication range, and expand range several times or more that in scheme. scheme is based on equilibrium feeding/equilibrium modulation (a two-terminal circuit for antenna operation), whereas disequilibrium three-terminal operation). simple rectification of received RF signals, employs combination stub resonance-based, impedance transformation boosting ladder ASK BPSK modulation, passive but can employ QPSK circuit.
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