发明名称 |
Electronic devices with parasitic antenna resonating elements that reduce near field radiation |
摘要 |
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.
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申请公布号 |
US8466839(B2) |
申请公布日期 |
2013.06.18 |
申请号 |
US20090632697 |
申请日期 |
2009.12.07 |
申请人 |
SCHLUB ROBERT W.;AMM DAVID T.;LEUNG OMAR S.;KING BRIAN M.;LI QINGXIANG;AYALA VAZQUEZ ENRIQUE;GOMEZ ANGULO RODNEY ANDRES;JIANG YI;CABALLERO RUBEN;APPLE INC. |
发明人 |
SCHLUB ROBERT W.;AMM DAVID T.;LEUNG OMAR S.;KING BRIAN M.;LI QINGXIANG;AYALA VAZQUEZ ENRIQUE;GOMEZ ANGULO RODNEY ANDRES;JIANG YI;CABALLERO RUBEN |
分类号 |
H01Q1/24 |
主分类号 |
H01Q1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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