Backscattering different radio frequency protocols
First Claim
Patent Images
1. A Radio Frequency (RF) tag, comprising:
- an antenna configured to receive an RF signal from any of a plurality of readers, wherein each reader is associated with a different protocol having different time durations;
a voltage rail configured to supply voltage to circuitry included in the RF tag; and
a storage module coupled to the antenna and the voltage rail and configured to store energy associated with the RF signal in a plurality of different storage units and substantially maintain a voltage on the voltage rail during any of the different time durations independent of an internal power supply, the storage module substantially maintains the voltage on the voltage rail by selectively switching the voltage rail between the plurality of different storage units, wherein the selectively switching of the storage units corresponds to a particular time duration and protocol of the received signal.
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Abstract
The present disclosure is directed to a system and method for backscattering different radio frequency protocols. In some implementations, a radio Frequency (RF) tag includes an antenna and a storage module. The antenna is configured to receive an RF signal from any of a plurality of readers. Each reader is associated with a different protocol having different time durations. The storage module is coupled to the antenna and configured to store energy associated with the RF signal. In addition, the storage module substantially maintains a voltage in the tag during any of the different time durations independent of an internal power supply.
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Citations
22 Claims
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1. A Radio Frequency (RF) tag, comprising:
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an antenna configured to receive an RF signal from any of a plurality of readers, wherein each reader is associated with a different protocol having different time durations; a voltage rail configured to supply voltage to circuitry included in the RF tag; and a storage module coupled to the antenna and the voltage rail and configured to store energy associated with the RF signal in a plurality of different storage units and substantially maintain a voltage on the voltage rail during any of the different time durations independent of an internal power supply, the storage module substantially maintains the voltage on the voltage rail by selectively switching the voltage rail between the plurality of different storage units, wherein the selectively switching of the storage units corresponds to a particular time duration and protocol of the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A passive RFID tag, comprising:
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an antenna configured to receive an RF signal from any of a plurality of readers, wherein each reader is associated with a different communication protocol having different time durations; a voltage rail configured to supply voltage to circuitry included in the RF tag; and a storage module coupled to the antenna and the voltage rail and configured to store, in a plurality of storage units, energy from RF signals transmitted using any of the different communication protocols, the tag configured to backscatter responses using the stored energy and in accordance with any of the different communication protocols, the storage module substantially maintains the voltage on the voltage rail by selectively switching the voltage rail between the plurality of different storage units, wherein the selectively switching of the storage units corresponds to a particular time duration and protocol of the received signal. - View Dependent Claims (10, 11, 12)
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13. A method, comprising:
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receiving an RF signal from any of a plurality of readers, wherein each reader is associated with a different protocol having different time durations; storing energy associated with the received RF signal in a plurality of different storage units; and substantially maintaining a voltage on a voltage rail of an RFID tag during any of the different time durations by selectively switching the voltage rail between the plurality of different storage units independent of an internal power supply, wherein the selectively switching of the storage units corresponds to a particular time duration and protocol of the received signal. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method, comprising:
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receiving an RF signal from any of a plurality of readers, wherein each reader is associated with a different communication protocol having different time durations; storing energy from the RF signal in a plurality of different storage units, wherein the RF signal is transmitted using any of the different communication protocols; selectively switching a voltage rail of an RFID tag between the plurality of different storage units to maintain a voltage applied to circuitry of the RFID tag above a specified threshold, wherein the selectively switching of the storage units corresponds to a particular time duration and protocol of the received signal; and backscattering responses using the stored energy and in accordance with any of the different communication protocols. - View Dependent Claims (20, 21, 22)
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Specification