Rectifier for wireless power transfer
First Claim
1. A rectifier for wireless power transfer, the rectifier comprising:
- an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency;
a first tank circuit comprising a first inductor and a first capacitance in series;
a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series;
a third capacitance in parallel with the electromagnetic signal receiving element; and
a rectifying element in parallel with the first capacitance;
wherein;
the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit,the first capacitance is between the second tank circuit and the third capacitance, andthe second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is an integer multiple, greater than one, of the first frequency.
1 Assignment
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Accused Products
Abstract
A rectifier for wireless power transfer is disclosed. The rectifier comprises an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency; a first tank circuit comprising a first inductor and a first capacitance in series; a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series; a third capacitance in parallel with the electromagnetic signal receiving element; and a rectifying element in parallel with the first capacitance, wherein: the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit, the first capacitance is between the second tank circuit and the third capacitance, and the second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is an integer multiple, greater than one, of the first frequency.
10 Citations
20 Claims
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1. A rectifier for wireless power transfer, the rectifier comprising:
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an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency; a first tank circuit comprising a first inductor and a first capacitance in series; a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series; a third capacitance in parallel with the electromagnetic signal receiving element; and a rectifying element in parallel with the first capacitance; wherein; the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit, the first capacitance is between the second tank circuit and the third capacitance, and the second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is an integer multiple, greater than one, of the first frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for wireless power transfer, comprising:
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providing a rectifier comprising an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency;
a first tank circuit comprising a first inductor and a first capacitance in series;
a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series;
a third capacitance in parallel with the electromagnetic signal receiving element; and
a rectifying element in parallel with the first capacitance, wherein the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit, the first capacitance is between the second tank circuit and the third capacitance, the second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is double the first frequency and wherein the ratio of the first capacitance to the second capacitance is greater than or equal to 0.70 and less than or equal to 1.50;connecting a load with a resistance such that the ratio of the resistance of the load to the characteristic impedance of the first tank circuit is greater than or equal to 0.30 and less than or equal to 3.00; and driving the electromagnetic signal receiving element with an electromagnetic signal oscillating at the first frequency. - View Dependent Claims (15, 16, 17)
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18. A method for wireless power transfer, comprising:
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providing a rectifier comprising an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency;
a first tank circuit comprising a first inductor and a first capacitance in series;
a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series;
a third capacitance in parallel with the electromagnetic signal receiving element; and
a rectifying element in parallel with the first capacitance, wherein the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit, the first capacitance is between the second tank circuit and the third capacitance, the second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is double the first frequency and wherein the ratio of the first capacitance to the second capacitance is greater than or equal to 0.65 and less than or equal to 0.75;connecting a load with a resistance such that the ratio of the resistance of the load to the characteristic impedance of the first tank circuit is greater than or equal to 0.55 and less than or equal to 0.65; and driving the electromagnetic signal receiving element with an electromagnetic signal oscillating at the first frequency. - View Dependent Claims (19)
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20. A method for wireless power transfer, comprising:
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providing a rectifier comprising an electromagnetic signal receiving element operable to be driven with an electromagnetic signal oscillating at a first frequency;
a first tank circuit comprising a first inductor and a first capacitance in series;
a second tank circuit in parallel with the electromagnetic signal receiving element, the second tank circuit comprising a second inductor and a second capacitance in series;
a third capacitance in parallel with the electromagnetic signal receiving element; and
a rectifying element in parallel with the first capacitance, wherein the first inductor is in series with the electromagnetic signal receiving element between the electromagnetic signal receiving element and the second tank circuit, the first capacitance is between the second tank circuit and the third capacitance, the second inductor and the second capacitance are selected such that the resonant frequency of the second tank circuit is double the first frequency and wherein the ratio of the first capacitance to the second capacitance is greater than or equal to 20;connecting a load; and driving the electromagnetic signal receiving element with an electromagnetic signal oscillating at the first frequency.
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Specification