Research Article
A Novel 3D PILA-Type UHF RFID Tag Antenna Mountable on Metallic Objects for IoT Indoor Localization
Table 2
Performance comparison of the difference in metal surface UHF RFID tags with published works.
| | This work | [28] | [26] | [29] | [14] | [30] | [31] |
| | Power (EIRP) | 1.4 W | 4 W | 1.4 W | 0.5 W | 4 W | 1.2 W | 3.3 W | | Covering the entire UHF RFID band | Yes | Yes | No | No | No | Yes | Yes | | Flexibility | No | No | No | No | Yes | No | No | | Tag size (mm3) | 45 × 82 × 4 | 104 × 31 × 7.6 | 204 × 100 × 22.4 | 98.8 × 25 × 30 | 42 × 50 × 1.7 | 56 × 45 × 0.8 | 88 × 32 × 3.2 | | Substrate | Air | FR4, air gap, parasitic elements | Rogers RO4003, air gap, AMC | 4003C rogers | PET, polyethylene (PP4) foam | Rogers/RT duroid 5880 | FR-4 | | Backing plate size (cm) | 30 × 30 | 30 × 25 | 31 × 25 | 9.8 × 3 | 20 × 20 (Kite) | N/A | N/A | | Bandwidth (MHz) | 843–927 (−3 dB) | 817–970 (−3 dB) | 865–875 (−3 dB) | 864.7–868.2 (−10 dB) | 920–923 (−10 dB) | 400–1400 (−10 dB) | 857–930 (−3 dB) | | Maximum gain (dB) on the metal plate | 4.08 | 2.1 | 6.39 | 3.55 | −2.46 | N/A | N/A | | Chip power sensitivity (dBm) | Alien Higgs-3 (−17) | Alien Higgs-4 (−18.5) | Alien Higgs-4 (−18.5) | Alien Higgs-4 −18.5) | Monza R6 (−20) | NSC MM9647 (−10) | Monza R6 (−20) | | Max. read range in the free space (m) | 3.6 (anechoic chamber) 6.3 (corridor) | N/A | 17 (anechoic chamber) 46.5 (corridor) 34 (outdoor) | N/A | ∼8–11.5 (anechoic cabinet) | 5 | N/A | | Max. read range on metal (m) | 18 (corridor) | 14.6 (outdoor) | 20.63 (anechoic chamber) 46.5 (corridor) 35 (outdoor) | 30.5 (corridor) | ∼5.2 (anechoic cabinet) | N/A | ∼9.6 (anechoic chamber) |
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