Can i Increase the NFC range upto 50cm by making a bigger antenna? i only want to write data into a NFC enabled EEPROM?
Theoretically, yes. Practically, you'll have to design a complete NFC frontend to drive a coil that's ca 1m in diameter. NFC isn't really designed with that degree of impedance mismatch in mind, so chances are the tag itself would need to be modified, too. So, not really NFC compliant afterwards.
So, no. The N in NFC is for &quot;near&quot;.