Near-field microwave wireless power system
First Claim
1. A wireless power transmitting device configured to transmit wireless power to a wireless power receiving device through a charging surface, comprising:
- a plurality of wireless power transmitting antennas having respective patch antenna resonating elements, wherein the charging surface is characterized by a longitudinal axis and wherein the patch antenna resonating elements are arranged in a staggered configuration along the longitudinal axis; and
a transmitter configured to supply alternating-current drive signals to the plurality of wireless power transmitting antennas to transmit the wireless power.
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Accused Products
Abstract
A wireless power system may use a wireless power transmitting device to transmit wireless power to a wireless power receiving device. The wireless power transmitting device may have microwave antennas that extend along an axis in a staggered arrangement. In the staggered arrangement, the microwave antennas are positioned on alternating sides of the axis. Each microwave antenna is elongated along a dimension that is perpendicular to the axis. Multiple antennas may overlap a wireless power receiving antenna in the wireless power receiving device. Control circuitry may use oscillator and amplifier circuitry to provide antennas that have been overlapped by the wireless power receiving antenna with drive signals. The drive signals may be adjusted based on feedback from the wireless power receiving device to enhance power transmission efficiency. The system may have a wireless power transmitting device with inductive wireless power transmitting coils.
12 Citations
20 Claims
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1. A wireless power transmitting device configured to transmit wireless power to a wireless power receiving device through a charging surface, comprising:
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a plurality of wireless power transmitting antennas having respective patch antenna resonating elements, wherein the charging surface is characterized by a longitudinal axis and wherein the patch antenna resonating elements are arranged in a staggered configuration along the longitudinal axis; and a transmitter configured to supply alternating-current drive signals to the plurality of wireless power transmitting antennas to transmit the wireless power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless power transmitting device configured to transmit wireless power to a wireless power receiving device through a charging surface, comprising:
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a row of microwave antennas extending along an axis that runs parallel to the charging surface, wherein each microwave antenna has a corresponding patch antenna resonating element with a center, and wherein the microwave antennas extending along the axis have the centers of their patch antenna resonating elements on alternating sides of the axis; and power transmitting circuitry coupled to the row of microwave antennas. - View Dependent Claims (15, 16, 17, 18)
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19. A wireless power transmitting device configured to transmit wireless power to a wireless power receiving antenna in a wireless power receiving device, comprising:
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a row of patch antenna resonating elements including first and second patch antenna resonating elements near-field-coupled to the wireless power receiving antenna; a first amplifier coupled to the first patch antenna resonating element and a second amplifier coupled to the second patch antenna resonating element; a first oscillator coupled to the first amplifier and a second oscillator coupled to the second amplifier; and control circuitry configured to use the first oscillator and the first amplifier to provide a first drive signal to the first patch antenna resonating element and configured to use the second oscillator and the second amplifier to provide a second drive signal to the second patch antenna resonating element with a different phase than the first drive signal. - View Dependent Claims (20)
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Specification