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

Table 3

Performance comparison of the proposed integrated HF-RFID and UHF-RFID tag antenna with current state of the art in RFID tag antennas.

Reference	Dimension (mm)	Frequency band operation	% fractional bandwidth in UHF band ( ≤ −10 dB)	Polarization type in UHF band	% fractional bandwidth of CP in UHF band (AR ≤ 3 dB)
Proposed	95 × 95 × 0.8	HF/UHF	4.44	Circular pol.	6.87
[4]	54 × 85 × 0.8	HF/UHF	4.01	Linear pol.	—
[5]	49 × 83 × 0.7	HF/UHF	0.12	Linear pol.	—
[6]	54 × 84 × 0.8	HF/UHF	3.36	Linear pol.	—
[7]	60 × 100 × 0.8	HF/UHF	0.58	Linear pol.	—
[8]	40 × 40 × 3.14	UHF	3.45	Circular pol.	1.08
[9]	74 × 74 × 1.6	UHF	25.98	Circular pol.	0.65
[10]	100 × 100 × 1.6	UHF	1.85	Circular pol.	0.86
[11]	60 × 60 × 1.6	UHF	3.55	Circular pol.	0.97
[12]	80 × 80 × 1.6	UHF	1.53	Circular pol.	1.76
[13]	85 × 85 × 0.4	UHF	3.61	Circular pol.	3.50
[14]	58.6 × 58.6 × 0.4	UHF	2.91	Circular pol.	0.86
[15]	35.6 × 35.6 × 0.508	UHF	4.06	Circular pol.	1.25
[16]	75 × 75 × 0.565	UHF	12.53	Circular pol.	2.92
[17]	56 × 56 × 0.4	UHF	14.41	Circular pol.	1.64
[18]	90 × 90 × 0.15	UHF	5.65	Circular pol.	5.45
[19]	127 × 127 × 0.15	UHF	7.58	Circular pol.	6.01
[20]	54 × 54 × 0.2	UHF	10.99	Circular pol.	3.91