US5563589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote identification device
Assignee: Thales SA
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Filing: 1994-12-09
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Granted: 1996-10-08
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Expires: 2014-12-09
Abstract
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.
Inventors
- 👤 Michel Blaimont
- 👤 Yves Canal
- 👤 Jean Chenu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S13/758; G07; G07C; G07C9/00; G07C9/00174; G07C9/00309; G07C2009/00388; G07C2009/00579; G07C2009/00603; G07C2009/00611; G07C2009/00753; G07C2009/00769; G07C2009/00793
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
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.
Claim 2
Dependent Claim
134 words
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.
Claim 3
Dependent Claim
17 words
A device according to claim 1, wherein the response microwave signal contains a code identifying the responder.
Claim 4
Dependent Claim
19 words
A device according to claim 1, wherein the inductor is the inductor of the primary winding of a transformer.
Claim 5
Independent Claim
85 words
A device according to any of the preceding claims, wherein the means to convert the received energy into voltage are constituted by at least the inductor of a second diode whose anode is connected to the first terminal of the inductor and a capacitor whose first terminal is connected to the cathode of the second diode, the second terminal of the inductor and the second terminal of the capacitor being connected to a reference potential, the voltage being given between the terminals of the capacitor.
Claim 6
Dependent Claim
19 words
A device according to claim 4, wherein the voltage regulation means are connected to the terminals of the capacitor.
Claim 7
Dependent Claim
47 words
A device according to claim 1, wherein the detection diode is also used for the transmission of the response microwave signal, and wherein the detection diode phase-shifts the received interrogation microwave signal by 0 or Π as a function of the command given by the encoding means.
Claim 8
Dependent Claim
14 words
A device according to claim 1, wherein the modulation signal is a square-wave signal.
Claim 9
Dependent Claim
14 words
A device according to claim 1, wherein the responder is fitted into a vehicle.
Claim 10
Dependent Claim
16 words
A device according to claim 1, wherein the responder takes the form of a chip card.
Claim 11
Dependent Claim
22 words
A device according to claim 1, wherein the response microwave signal is offset in frequency with respect to an interrogation microwave signal.
References Cited (Backward Citations)
US4001822A
Cited
US4104630A
Cited
US4114151A
Cited
US4388524A
Cited
US4631708A
Cited
US4912471A
Cited
US4656472A
Cited
US4786707A
Cited
EP0412884A1
Cited
EP0480413A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-08 | 2000-04-08 | 2000-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-08 | 2004-04-08 | 2004-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-08 | 2008-04-08 | 2008-10-08 | $7700.00 | Window Closed / Lapsed |