Can't detect/discover type B (iso-14443 B) card using PN7150

[iwannugraha]

Hi,

Currently i'm using PN7150 with android board.
The NFC reader (PN7150) can be used to read type A cards, but cannot detect type B cards at all.

Below is the PCB antenna that I use :

NFC Antenna

Antenna dimension

The following is a schematic for the antenna matching circuit:

matching Circuit Schematic

I got the antenna matching values from the calculation results from the Antenna Calculator.

Antenna Calculator

I did the tuning process for the values C0, C1, and C2 and used the RFSim99 application. Below are the simulation results on the RFSim99 application:

RFSim99 schematicSmith chart simulation results from RFSim99:

RFSim99 Smith Chart

Below is the signal shape (Smith chart) of the measurement results on the PCB board using Nano VNA.

Measure the signal using nano vna

actual signal shape using nanovna

Please help me!!

[danielchen]

Hi

The matching looks good. Need more information to check it.

Regards

Daniel

[iwannugraha]

Hi @danielchen ,

What you need?

Best Regards,

iwan