Current Situation and Future Trend of RFID-1.4 overview of passive tags

The Passive Tag does not generate electricity itself, but uses the radio waves sent by the reader as the power of the IC circuit. This is divided into two types: the induction mode and the electric wave mode (Figure 3 ).

Electromagnetic Induction: receives the time-varying magnetic field from the reader through a ring antenna to provide power to the IC circuit. This is the same principle as a turbine generator (Tony Note: How is a turbine generator working? ).

Radio waves: In order to effectively receive the waves sent by the reader, RFID tags are composed of an antenna with a wavelength of 2 and a wavelength of 4, the received radio waves provide power to the IC circuit. This works the same way as the ore radio that does not require a battery (Tony Note: Sorry, I don't understand the ore radio either ).

(Figure 3) (Tony note: this picture is too difficult to draw and will be added later)

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