Potential of chipless authentication based on randomness inherent in fabrication process for RF and THz

Authentication anti-counterfeiting authentication technology Cavity resonators chipless authentication chipless authentication potential chipless RFID concept electromagnetic wave EM wave Fabrication fabrication process fabrication tolerance geometrical parameters Gratings manufactured product authentication microwave nondestructive authentication nondestructive testing noninvasive authentication radiofrequency identification Radiofrequency identification randomness Resonant frequency RF domain RFID Substrates terahertz terahertz wave THz domain THz wave