RF tagging system including RF tags with variable frequency resonant circuits

作者： Sanjar Ghaem , Eric L. Krenz , Scott N. Carney , George L. Lauro

DOI:

关键词: RLC circuit 、 Electronic circuit 、 Signal 、 Electrical engineering 、 Identification (information) 、 Tag system 、 Code (cryptography) 、 Detector 、 Computer science 、 Decoding methods

摘要: An RF tagging system which provides a large number of potential identification codes without increasing the physical size tags used therein includes plurality (20, 90, 140, 230, 250) and an external reader (200). Each tag at least one resonant circuit (22, 92, 142, 231, 251) is any different frequencies, receiver (34, 102, 152,244, 264) for receiving interrogation signal, control (36,104,154,246, 266) responsive to receipt signal causing its be selected ones frequencies in predetermined time sequence corresponding code. The detector (216, 218, 220, 222) detecting decoder (226) decoding recovering