– Read only
– Write once read many
– Read/write
? 以电源(Power)区分
– 主动(Active):equipped with battery
– 被动(Passive)
? 以读取频率(OP Frequency)区分
– 低频:125 kHz (10 cm)*
– 高频:13.56 MHz (0.3~1 m)*
– 超高频:433 ~915 MHz, 2.45 GHz (1~3 m)
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