A Novel 3D PILA-Type UHF RFID Tag Antenna Mountable on Metallic Objects for IoT Indoor Localization

<div>Far-field measurement (<i>d</i> = 55 cm): minimum power versus frequency when the tag antenna is placed in the free space and on the metal plate.</div>

International Journal of Antennas and Propagation

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Figure 8

Figure 8: A Novel 3D PILA-Type UHF RFID Tag Antenna Mountable on Metallic Objects for IoT Indoor Localization 