ELECTRONIC DEVICES WITH PARASITIC ANTENNA RESONATING ELEMENTS THAT REDUCE NEAR FIELD RADIATION
摘要
<p>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.</p>
申请公布号
CA2767800(C)
申请公布日期
2015.04.28
申请号
CA20102767800
申请日期
2010.06.22
申请人
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