Radio Frequency Transponder
Information is encoded in a resonator/antenna structure, which may be interrogated in order to retrieve the information via radio frequency (RF) excitation. The resonator/antenna structure comprises a multiresonator including a plurality of substructures, and exhibits a plurality of resonances in the RF domain. Characteristic frequencies of the resonances depend upon the substructures, which may be modified in accordance with information to be encoded within the resonator/antenna structure. The resonator/antenna may be formed as a conductive structure disposed upon a dielectric substrate, and may be useful for encoding information within chipless RFID tags, security documents, negotiable instruments, and so forth. A variety of suitable multiresonator structures are disclosed, including multi-stop-band filters comprising cascaded spiral resonators, a "wheel and spoke" structure, an interleaved resonant circuit, and a fractal resonator structure.
PRERADOVIC STEVAN [AU]; KARMAKAR NEMAI CHANDRA [AU]; BALBIN ISAAC [AU]; ROY SUSHIM MUKUL [AU]; SWIEGERS GERHARD FREDERICK [AU]
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