Wisconsin Alumni Research Foundation

Yaman Sangar

Bhuvana Krishnaswamy

Kai Pederson

A long-range radio tag uses radio energy harvesting and separates the functions of radiofrequency excitation and radio tag reading such that the reader may be displaced at a substantial distance from the radio tags. The ability of the radio tags to communicate with a distant reader is further enhanced by a query system which allows a highly simplified message to be transmitted by the radio tags, as flexibly defined by a received query. The use of addressing and frequency multiplexing system allows a large number of tags to be serviced by a single reader.

Long distance wireless radio tag with RF energy harvesting

A low-power transmission system for periodically transmitted data communicates the periodic data as an interval between two transmitted anchor symbols when the transmitter and associated circuitry are shut down. Meaningful power savings for short data words is obtained by use of a star topology allowing elimination of the receiver power consumption. Multi-bit anchor symbols provide improved error detection and the separation of simultaneous transmission from multiple transmitters by a single receiver.

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Madison, WI, United States of America

Yaman Sangar