Dual-Band Antenna/AMC Combination for RFID

Table 3

Measured gain, directivity, and radiation efficiency.

CPW-antenna	f = 2.20 GHz			f = 5.80 GHz
	G (dB)	D (dB)	𝜂 (%)	G (dB)	D (dB)	𝜂 (%)
Bow-tie	—	—	—	2.2	5.4	48
Bow-tie-AMC	3.1	6.5	46	2.4	5.9	45
Bow-tie-AMC metallic plate	2.9	6.9	40	2.1	6.4	37