Review Article

A Review of Implementing ADC in RFID Sensor

Figure 8

Power induced onto a tag load by a typical HF RFID reader according to its distance from the reader. The reader antenna is a square coil, 10 × 10 cm, 6 turns, and 125 mA. The tag is equipped with a square spiral planar coil, 12 × 12 mm, 8 turns.