I need to build an application to detect an NFC antenna without an NFC passively powered chip.
As we know, we can detect an NFC tag by powering the NFC chip inside this tag. It will then broadcast its ID to the mobile using an NFC data transmission field.
What if I build an antenna with some kind of load such as a resistor; with this I can detect that there is a power drain caused by the NFC adapter in the mobile. As result I will be able to detect that there is an NFC antenna in the back of the mobile. Any ideas?