SYSTEM FOR AMBIENT ENERGY HARVESTING
First Claim
1. An energy harvester to convert incident radio frequency (RF) energy to direct current energy, the energy harvester comprising:
- a first RF rectifier to output a first voltage determined by rectified RF energy in response to received RF energy;
a first energy reservoir coupled to the first RF rectifier to store energy at the first voltage;
a DC/DC converter coupled to the first energy reservoir to convert the first voltage to a second voltage;
a second reservoir coupled to the DC/DC converter to store energy at the second voltage, the second voltage being greater than the first voltage; and
a third reservoir coupled to the second reservoir to receive energy transferred from the second reservoir periodically.
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Accused Products
Abstract
A method and apparatus is disclosed herein for harvesting ambient energy. In one embodiment, an energy harvester comprises: a first RF rectifier to output a first voltage determined by rectified RF energy in response to received RF energy; a first energy reservoir coupled to the first RF rectifier to store energy at the first voltage; a DC/DC converter coupled to the first energy reservoir to convert the first voltage to a second voltage; a second reservoir coupled to the DC/DC converter to store energy at the second voltage, the second voltage being greater than the first voltage; and a third reservoir coupled to the second reservoir to receive energy transferred from the second reservoir periodically.
123 Citations
19 Claims
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1. An energy harvester to convert incident radio frequency (RF) energy to direct current energy, the energy harvester comprising:
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a first RF rectifier to output a first voltage determined by rectified RF energy in response to received RF energy; a first energy reservoir coupled to the first RF rectifier to store energy at the first voltage; a DC/DC converter coupled to the first energy reservoir to convert the first voltage to a second voltage; a second reservoir coupled to the DC/DC converter to store energy at the second voltage, the second voltage being greater than the first voltage; and a third reservoir coupled to the second reservoir to receive energy transferred from the second reservoir periodically. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A device comprising:
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an antenna; a load; and an energy harvester coupled to the antenna and the load, wherein the energy harvester comprises a first RF rectifier to output a first voltage determined by rectified RF energy in response to received RF energy; a first energy reservoir coupled to the first RF rectifier to store energy at the first voltage; a DC/DC converter coupled to the first energy reservoir to convert the first voltage to a second voltage; a second reservoir coupled to the DC/DC converter to store energy at the second voltage, the second voltage being greater than the first voltage; and a third reservoir coupled to the second reservoir to receive energy transferred from the second reservoir periodically. - View Dependent Claims (17, 18, 19)
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Specification