Wirelessly Pattern Reconfigurable Yagi Antenna Based on Radio Frequency Identification

Table 1

Reconfiguration schemes comparison.

Ref.	Control mode	Control range (m)	Power consp.	Pattern stability	Cost
[10]	Diodes	>1	>100 mW	No	Middle
[8]	Bluetooth	<10	>10 mW	Yes	Middle
[7]	Laser	>1	>100 mW	Yes	Expensive
This work	RFID	25	12 μW	Yes	Cheap