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Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system

A technology of wireless power transmission and wireless charging, applied in the direction of preventing/reducing unwanted electric/magnetic effects, loop antennas with ferromagnetic material cores, antennas, etc., can solve troublesome and inconvenient problems

Inactive Publication Date: 2019-02-05
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cables and similar connectors can sometimes be inconvenient or cumbersome and have other disadvantages

Method used

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  • Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system
  • Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system
  • Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system

Examples

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Embodiment Construction

[0026] The detailed description set forth below with reference to the accompanying drawings is intended as a description of exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The term "exemplary" is used throughout this description to mean "serving as an example, instance, or illustration" and should not necessarily be construed as preferred or advantageous over other exemplary embodiments. The detailed description includes specific details for the purpose of providing a thorough understanding of exemplary embodiments of the invention. In some instances, some devices are shown in block diagram form.

[0027] In this description, the term "application" may also include files with executable content, such as: object code, scripts, byte code, markup language files, and patches. In addition, the "application" referred to herein may also include files that are not executable in nature, such as docum...

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PUM

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Abstract

An apparatus for wireless power transfer includes a transmit antenna configured to generate a wireless field to power or charge a load, a wireless charging area configured to receive a device to be wirelessley charged via the wireless field, the transmit antenna located outside of a periphery of the wireless charging area, and at least one shielding element overlapping the transmit antenna on a side of the transmit antenna from which the device is configured to be positioned within the wireless charging area, the at least one shielding element configured to diminish at least a portion of the wireless field such that the wireless field in the wireless charging area is stronger than the wireless field where the at least one shielding element overlaps the transmit antenna.

Description

technical field [0001] This disclosure generally relates to wireless power. More specifically, the present disclosure is directed to mitigating electromagnetic interference (EMI) and radio frequency (RF) interference from wireless power transmitters. Background technique [0002] An increasing number and variety of electronic devices are powered via rechargeable batteries. Such devices include mobile phones, portable music players, laptop computers, tablet computers, computer peripherals, communication devices (eg, Bluetooth devices), digital cameras, hearing aids, and the like. While battery technology has improved, battery-powered electronic devices increasingly require and consume greater amounts of power, thereby often requiring recharging. Rechargeable devices are often charged via a wired connection requiring a cable or other similar connector to physically connect to a power supply. Cables and similar connectors can sometimes be inconvenient or cumbersome and have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/10H01Q1/52H02J50/70H01F38/14H01Q1/22
CPCH02J7/0044H02J50/10H02J50/70H01F38/14H01F27/36H01F27/361H01F27/363H01F27/366H02J50/12H01Q1/526H01Q7/06H01Q1/2208
Inventor 郑胜宪
Owner QUALCOMM INC