Power harvesting circuit and method
First Claim
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1. A circuit for use in a power harvesting system, comprising:
- a first antenna having a first terminal coupled to a summing node through an input capacitor, and a second terminal, the second terminal coupled to the summing node through a first diode;
a second antenna having a first terminal coupled to the second terminal of the first antenna and a second terminal coupled to an interconnection between the input capacitor and the summing node through a second diode,wherein the summing node is coupled to an output node through an output diode, wherein an output capacitor is provided at the output node;
wherein said second terminal of the second antenna is adapted to provide a signal in opposite phase with a signal provided at the first terminal of the first antenna.
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Abstract
A circuit for use in a power harvesting system provides signals from at least first and second antennae to a summing node through respective diodes. The summing node is coupled to an output node through an output diode, and an output capacitor is provided at the output node. This implements combination of antenna signals within a rectification circuit.
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Citations
16 Claims
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1. A circuit for use in a power harvesting system, comprising:
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a first antenna having a first terminal coupled to a summing node through an input capacitor, and a second terminal, the second terminal coupled to the summing node through a first diode; a second antenna having a first terminal coupled to the second terminal of the first antenna and a second terminal coupled to an interconnection between the input capacitor and the summing node through a second diode, wherein the summing node is coupled to an output node through an output diode, wherein an output capacitor is provided at the output node; wherein said second terminal of the second antenna is adapted to provide a signal in opposite phase with a signal provided at the first terminal of the first antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power harvesting method, combining multiple antenna signals, comprising:
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coupling a first terminal of a first antenna to a summing node through an input capacitor; for each of the multiple antennae; coupling a first antenna terminal of each subsequent antenna with a second terminal of the respective previous antenna, and providing a signal from the second antenna terminal of each antenna to an interconnection between the input capacitor and the summing node of a voltage doubling circuit through a respective diode wherein said second terminal of the second antenna is adapted to provide a signal in opposite phase with a signal provided at the first terminal of the first antenna. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification