Battery-assisted backscatter RFID transponder
First Claim
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1. A radio frequency (RF) transponder, comprising:
- an antenna, which is arranged to receive interrogation radiation at a first power level from an interrogation device and to backscatter the interrogation radiation at a second power level that is greater than 75% of the first power level; and
an integrated circuit (IC), which is arranged to store a code comprising information and to vary a radiation characteristic of the antenna responsively to the code so as to modulate the information onto the backscattered radiation.
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Abstract
A radio frequency transponder includes at least one battery, which is coupled to provide electrical power for operating the transponder and at least one antenna, which is configured to receive and backscatter RF interrogation radiation from an interrogation device. An integrated circuit is arranged to store a code including information and, powered only with energy provided by the battery, to vary a radiation characteristic of the antenna responsively to the code so as to modulate the information onto the backscattered radiation.
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11 Claims
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1. A radio frequency (RF) transponder, comprising:
an antenna, which is arranged to receive interrogation radiation at a first power level from an interrogation device and to backscatter the interrogation radiation at a second power level that is greater than 75% of the first power level; and
an integrated circuit (IC), which is arranged to store a code comprising information and to vary a radiation characteristic of the antenna responsively to the code so as to modulate the information onto the backscattered radiation.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification