Electronic devices with parasitic antenna resonating elements that reduce near field radiation

A technology for resonant elements and electronic equipment, applied to antenna equipment with additional functions, structural forms of radiation elements, antenna components, etc., can solve problems such as difficult antennas

Active Publication Date: 2011-01-26
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes it difficult to implement antennas in electronic devices that contain

Method used

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  • Electronic devices with parasitic antenna resonating elements that reduce near field radiation
  • Electronic devices with parasitic antenna resonating elements that reduce near field radiation
  • Electronic devices with parasitic antenna resonating elements that reduce near field radiation

Examples

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Embodiment Construction

[0024] An electronic device may have wireless communication circuitry. Wireless communication circuitry may be used to support wireless communication in one or more wireless communication frequency bands. For example, wireless communication circuitry may transmit and receive signals in cellular telephone frequency bands.

[0025] To meet user demands for small form factor wireless devices, manufacturers are continually striving to reduce the size of the components used in these devices, while providing enhanced functionality. Especially in configurations where electronic devices are used to transmit and receive radio frequency signals in cellular telephone bands and other relatively wide bandwidth communication bands, meeting the required antenna performance standards within a compact device is a challenge. To ensure sufficient signal strength during communication, high transmission power and wide antenna bandwidth are required, but these properties can pose challenges for co...

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PUM

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Abstract

The invention relates to electronic devices with parasitic antenna resonating elements that reduce near field radiation. Antennas are provided for electronic devices such as portable computers. An electronic device may have a housing in which an antenna is mounted. The housing may be formed of conductive materials. A dielectric antenna window may be mounted in the housing to allow radio- frequency signals to be transmitted from the antenna and to allow the antenna to receive radio-frequency signals. Near-field radiation limits may be satisfied by reducing transmit power when an external object is detected in the vicinity of the dielectric antenna window and the antenna. A proximity sensor may be used in detecting external objects. A parasitic antenna resonating element may be interposed between the antenna resonating element and the dielectric antenna window to minimize near-field radiation hotspots. The parasitic antenna resonating element may be formed using a capacitor electrode for the proximity sensor. A ferrite layer may be interposed between the parasitic element and the antenna window.

Description

[0001] This application claims priority to U.S. Provisional Patent Application No. 61 / 226,684, filed July 17, 2009, and U.S. Patent Application No. 12 / 632,697, filed December 7, 2009, which are incorporated by reference in their entirety here. technical field [0002] The present invention relates to antennas, and more particularly, to antennas for electronic devices. Background technique [0003] Electronic devices such as portable computers and handheld electronic devices are becoming more and more popular. Devices such as these often have wireless communication capabilities. For example, some electronic devices may use long-range wireless communication circuitry, such as cellular telephone circuitry, to communicate using the 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz cellular telephone frequency bands (e.g., primary Global System for Mobile Communications or GSM cellular telephone frequency bands). It is also possible to handle the 2100MHZ frequency band and other frequen...

Claims

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Application Information

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IPC IPC(8): H01Q1/22H01Q1/36G06F1/16
CPCH01Q1/245H01Q1/243H01Q1/44H03K17/955H01Q5/378H04B1/38H01Q1/38
Inventor R·W·斯科卢巴D·T·安姆O·S·勒格B·M·金李青湘E·A·瓦兹奎兹R·A·G·安古鲁蒋奕R·卡巴勒罗
Owner APPLE INC
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