What are the limitations of thick-film printed antenna RFID tags?
• Printing can be a fast process but is limited for the very fine features. Thus printed antenna traces work better in the 915 to 2450 MHz tags that typically require only one single loop. It is particularly difficult for the smaller area RFID tags for 13.56 MHz. • Conductive inks must be precious metals so that oxidation will not occur. This is intrinsically more expensive than copper films used in subtractive process.
