Remote identification device
First Claim
1. A remote identification device, comprising an interrogator and a responder, the interrogator sending an interrogation microwave signal to the responder, wherein the interrogator has modulating means to modulate the interrogation microwave signal and wherein the responder has accumulation means for the accumulation, at each period of the signal that modulates the interrogation microwave signal, of the energy carrier by this microwave signal, said accumulation means being constituted by an inductor whose first terminal is connected to an anode of a detection diode of the interrogation microwave signal, the inductor being charged by a current at the frequency of the modulation signal, the responder furthermore having means to convert the energy received into voltage greater than the threshold voltages of semiconductors used by means for encoding and transmitting a response microwave signal to the interrogator.
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Accused Products
Abstract
In a remote identification device, an interrogator sends a microwave signal to a responder, the interrogation wave signal being modulated. At each period of the modulation signal of the interrogation wave signal, the responder accumulates the energy conveyed by this signal, the energy received being converted into supply voltage to be used to encode and transmit a response microwave signal to the interrogator. This may be used for the identification of objects by a radar signal.
24 Citations
10 Claims
- 1. A remote identification device, comprising an interrogator and a responder, the interrogator sending an interrogation microwave signal to the responder, wherein the interrogator has modulating means to modulate the interrogation microwave signal and wherein the responder has accumulation means for the accumulation, at each period of the signal that modulates the interrogation microwave signal, of the energy carrier by this microwave signal, said accumulation means being constituted by an inductor whose first terminal is connected to an anode of a detection diode of the interrogation microwave signal, the inductor being charged by a current at the frequency of the modulation signal, the responder furthermore having means to convert the energy received into voltage greater than the threshold voltages of semiconductors used by means for encoding and transmitting a response microwave signal to the interrogator.
Specification