Patent ID: 7385511

Claim:
A method for energizing remote transponders and communication, said method comprising the steps of: a) a reader generating and transmitting coded sequences of short high power pulses repeatedly through a reader antenna; b) at least one transponder matching with coded power pulse sequence and receiving the high power pulses via a transponder antenna, said transponder further comprising a power supply and a chip, said chip comprising a detector, a decoder, a data source, a modulator, a pseudo random generator and a pulse generator; c) said transponder antenna introducing the pulses to said power supply containing a delay line, a summator, a rectifier and an energy store; d) said energy store becoming charged and said energy store feeding said chip; e) said detector and decoder of said chip further processing the signals; f) said data source, modulator, pseudo random generator and pulse generator forming a response to the reader; g) said reader receiving the response and sending coded data pulse sequences to the transponder, said coded data pulse sequences being either separate from the coded power pulse sequences or being embedded into the coded power pulse sequences; and h) said power pulse sequences and data pulse sequences being modulated with pulse position modulation or bi-phase modulation.