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.

Claims

4 · 2 independent · depth 2

4 granted claims

›1.independentAn electronic device having front and rear surfaces, comprising:na conductive housing;a dielectric antenna window in the conductive housing;an antenna…+1

›3.independentA tablet computer comprising:na conductive housing;a dielectric antenna window in the conductive housing;radio-frequency transceiver circuitry;an ante…+1

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H01Q1/24

USPC · US Patent Classification

343/702343/872343/873

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Pendency

3.4 y

1,233 days filing → grant

Office actions

non-final + final

Responses

no RCE

Interviews

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Examiner

Dieu H Duong

art unit 2821 · TC 2800

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Citations: 87 back · 0 forward

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Priority chain

2 priority documents

Priority

17 Jul 2009

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61226684	17 Jul 2009
related publication	US 20110012794 A1	20 Jan 2011

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