Near-Field HF-RFID and CMA-Based Circularly Polarized Far-Field UHF-RFID Integrated Tag Antenna

<div>The simulated impedance of UHF-RFID tag antenna under varying (a) <i>W</i><sub>c</sub>, (b) <i>L</i><sub>c</sub>, and (c) <i>H</i><sub>c</sub>.</div>

International Journal of Antennas and Propagation

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Figure 9

Figure 9: Near-Field HF-RFID and CMA-Based Circularly Polarized Far-Field UHF-RFID Integrated Tag Antenna 