Cavity-backed antenna for electronic devices

    公开(公告)号:GB2471753A

    公开(公告)日:2011-01-12

    申请号:GB201011050

    申请日:2010-07-01

    Applicant: APPLE INC

    Abstract: A cavity-backed antenna 26, or an electronic device, comprises a cavity-backed resonant antenna element 70 where the cavity 72 is formed from a dielectric support structure 112 covered with a layer of conductive material 74, 76. The dielectric material may be a moulded plastic support structure 112 covered by a conductive metal such as copper or aluminium via any suitable deposition technique. The resonant antenna element 70 may take any form including one or more open and/or closed slot arrangements in a conductive plate, planar inverted-F antenna arrangements, patch antennas or various monopole and/or dipole printed antenna arrangements. The antenna may be arranged to operate in one or more different frequency bands. The cavity backed antenna 26 may be used in a housing associated with an electronic device such as a computer or a mobile phone. An antenna window may be provided in the said housing where the window may be formed by a region of dielectric material or from antenna window slots formed in a conductive member such as a conductive wall of the electronic device housing.

    Antennas for handheld electronic devices

    公开(公告)号:AU2008205147B2

    公开(公告)日:2010-12-16

    申请号:AU2008205147

    申请日:2008-01-03

    Applicant: APPLE INC

    Abstract: Handheld electronic devices are provided that contain wireless communications circuitry having at least one antenna. The antenna may have a planar ground element and a planar resonating element. The planar ground element may have a rectangular shape that matches a rectangular housing shape for a handheld electronic device. A dielectric-filled slot may be formed in one end of the planar ground element. The planar resonating element may be located above the slot. The antenna may be a hybrid antenna that contains both a slot antenna structure formed from the slot and a planar inverted-F structure formed from the planar resonating element and the planar ground element. The antenna may be fed using a single transmission line or two transmission lines. With two transmission lines, one transmission line may be associated with the slot antenna structure and one transmission line may be associated with the planar inverted-F antenna structure.

    Antennas for handheld electronic devices with conductive bezels

    公开(公告)号:GB2463179A

    公开(公告)日:2010-03-10

    申请号:GB0920735

    申请日:2008-03-05

    Applicant: APPLE INC

    Abstract: A handheld electronic device may be provided that contains wireless communications circuitry. The handheld electronic device may have a housing and a display. The display may be attached to the housing using a conductive bezel. The handheld electronic device may have one or more antennas for supporting wireless communications. A ground plane in the handheld electronic device may serve as ground for one or more of the antennas. The ground plane and bezel may define a opening. A rectangtular slot antenna or other suitable slot antenna may be formed from or within the opening. One or more antenna resonating elements may be formed above the slot. An electrical switch that bridges the slot may be used to modify the perimeter of the slot so as to huge the communications bands of the handheld electronic device.

    Electronic device cavity antennas with slots and monopoles

    公开(公告)号:AU2015101429A4

    公开(公告)日:2015-11-12

    申请号:AU2015101429

    申请日:2015-10-01

    Applicant: APPLE INC

    Abstract: Abstract of the Disclosure An electronic device may be provided with wireless circuitry. The wireless circuitry may include cavity antennas. A cavity antenna may be formed from a metal antenna cavity and resonating element structures. The metal antenna cavity may be formed from metal traces on a dielectric carrier. The resonating element structures may include directly fed and indirectly fed slot antenna resonating elements and monopole antenna resonating elements. The metal antenna cavity may exhibit a resonance that is tuned using a transmission line tuning stub. Filters and duplexer circuits may be used in routing signals at different frequency bands among the antenna resonating elements. STORAGE AND PROCESSING CIRCUITRY 3 INPUT-OUTPUT CIRCUITRY 44 INPUT-OUTPUT DEVICES (E.G., SENSORS, DISPLAYS, 32 SPEAKERS, MICROPHONES, BUTTONS, ETC.) WIRELESS COMMUNICATIONS 90 34 GPS RECEIVER CIRCUITS 42 LOCAL WIRELESS TRANSCEIVER CIRCUITS (E.G., WIFI AND BLUETOOTH) 36 REMOTE WIRELESS TRANSCEIVER CIRCUITS (E.G., CELLULAR 38 TELEPHONE TRANSCEIVER CIRCUITRY)

    Electronic device antenna with interference mitigation circuitry

    公开(公告)号:AU2015101172A4

    公开(公告)日:2015-10-08

    申请号:AU2015101172

    申请日:2015-08-26

    Applicant: APPLE INC

    Abstract: Abstract of the Disclosure An electronic device may be provided with an antenna. The antenna may have an antenna resonating element and an antenna ground. The antenna resonating element may be formed from peripheral conductive housing structures. An audio jack or other connector may be mounted in an opening in the peripheral conductive housing structures. The audio jack may overlap the antenna ground. Contacts in the audio jack may be coupled to an interference mitigation circuit. The interference mitigation circuit may include capacitors coupled to the ground and inductors coupled between the contacts and the capacitors. Radio frequency signal blocking inductors may be coupled between the interference mitigation circuit and respective ports in an audio circuit. fa fb f(MHz)

    Cavity-backed antenna for tablet device

    公开(公告)号:AU2010290076B2

    公开(公告)日:2014-08-14

    申请号:AU2010290076

    申请日:2010-06-22

    Applicant: APPLE INC

    Abstract: An electronic device may have a cavity antenna. The cavity antenna may have a logo-shaped dielectric window. An antenna resonating element for the cavity antenna may be formed from conductive traces on a printed circuit board. An antenna resonating element may be formed from the traces. The antenna resonating element may be mounted on an antenna support structure. A conductive cavity structure for the cavity antenna may have a planar lip that is mounted flush with an interior surface of a conductive housing wall. The cavity structure may have more than one depth. Shallower planar portions of the cavity structure may lie in a plane. The antenna resonating element may be located between the plane of the shallow cavity walls and an external surface of the conductive housing wall.

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

    公开(公告)号:AU2010273847B2

    公开(公告)日:2014-06-12

    申请号:AU2010273847

    申请日:2010-06-22

    Applicant: APPLE INC

    Abstract: 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.

    Tunable loop antennas
    20.
    发明专利

    公开(公告)号:AU2012200977A1

    公开(公告)日:2012-09-27

    申请号:AU2012200977

    申请日:2012-02-20

    Applicant: APPLE INC

    Abstract: Abstract of the Disclosure Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. A parallel 5 fed loop antenna may be formed from portions of a conductive bezel and a ground plane. The antenna may operate in multiple communications bands. The bezel may surround a peripheral portion of a display that is mounted to the front of an electronic device. The bezel may 10 contain a gap. Antenna feed terminals for the antenna may be located on opposing sides of the gap. A variable capacitor may bridge the gap. An inductive element may bridge the gap and the antenna feed terminals. A switchable inductor may be coupled in parallel with the 15 inductive element. Tunable matching circuitry may be coupled between one of the antenna feed terminals and a conductor in a coaxial cable connecting the transceiver circuitry to the antenna.

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