Staggered pattern energy harvesting and retro-directive backscatter communications for passive RFID tags and sensors

RFID;Passive;Energy harvesting;Passive RFID;Passive tags;Beam steering;Switched-beam;Passive beam steering;Retrodirective;Backscatter;Retrodirective backscatter;Hybrid;Multi-antenna tags;Tag range;RFID range;Microwave rfid;Microwaves;Optimizer;Orthogonal radiation patterns;5.8GHz RFID;Custom rfid structures

Marshall, Blake Ryan ; Durgin, Gregory D. Electrical and Computer Engineering Peterson, Andrew F. Steffes, Paul G. Tentzeris, Manos M. Rogers, Shawn Lee, Hoseon ; Durgin, Gregory D.

University:Georgia Institute of Technology

Department:Electrical and Computer Engineering

关键词: RFID;    Passive;    Energy harvesting;    Passive RFID;    Passive tags;    Beam steering;    Switched-beam;    Passive beam steering;    Retrodirective;    Backscatter;    Retrodirective backscatter;    Hybrid;    Multi-antenna tags;    Tag range;    RFID range;    Microwave rfid;    Microwaves;    Optimizer;    Orthogonal radiation patterns;    5.8GHz RFID;    Custom rfid structures;   

Others  :  https://smartech.gatech.edu/bitstream/1853/59826/1/MARSHALL-DISSERTATION-2018.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

This work introduces an optimal backscatter and energy harvesting solution for radio frequency identification (RFID) by using N antennas with N ports called a staggered patterned and retro-directive (SPAR) tag. By using multiple ports and a unitary scattering matrix on the SPAR tag, the structure is able to create multiple orthogonal radiation patterns to improve range of passive RFID tags. This is demonstrated on a 5.8 GHz RFID tag using a two-element patch antenna array fed by a 90˚ hybrid. In addition to canonical designs, new SPAR structures are hypothesized with optimized size, bandwidth, etc. A co-simulator is developed capable of searching a vast space of possible feed networks with N-by-N ports that meet the requirements of a unitary scattering matrix. A new structure that meets the 2-by-2 SPAR scattering matrix requirements is presented to demonstrate the capabilities of the software. The software can also be generalized to discover new physical structures of larger N−by−N SPAR tags or other microwave devices.