Typical Impedance And Phase Plot - Access OCR640 Operational Description

Z = 50 Ohm (+/- 3 Ohm)
Ф = +/- 10 degree
Z = 50 Ohm (+/- 3 Ohm)
Ф = +/- 10 degree
As said earlier, the RF energy is switched between the antennas one at a time, scanning for RFID
passports. The antenna switching and the polling sequence timing are shown in the following diagram.
Fig 5: OCR640 Antenna #1 – Typical Impedance and Phase plot
Fig 6: OCR640 Antenna #2 – Typical Impedance and Phase plot