Qingxiang Li from 10168 Amelia Ct, Cupertino, CA 95014, age 54

Lawyers & Attorneys

Qingxiang Li - Lawyer

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ISLN:

1000754264

Admitted:

2015

Resumes

Qingxiang Li

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Us Patents

Hybrid Antennas For Electronic Devices
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US Patent:

8102319, Jan 24, 2012
Filed:

May 13, 2008
Appl. No.:

12/120008
Inventors:

Robert W. Schlub - Campbell CA, US
Qingxiang Li - Mountain View CA, US
Juan Zavala - Watsonville CA, US
Robert J. Hill - Salinas CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H01Q 1/24
US Classification:

343702, 343767
Abstract:

A portable electronic device is provided that has a hybrid antenna. The hybrid antenna may include a slot antenna structure and a planar inverted-F antenna structure. The planar inverted-F antenna structure may be formed from traces on a flex circuit substrate. A backside trace may form a series capacitance for the planar inverted-F antenna structure. The antenna slot may have a perimeter that is defined by the location of conductive structures such as flex circuits, metal housing structures, a conductive bezel, printed circuit board ground conductors, and electrical components. Springs may be used in electrically connecting these conductive elements. A spring-loaded pin may be used as part of an antenna feed conductor. The pin may connect a transmission line path on a printed circuit board to the planar inverted-F antenna structure while allowing the planar inverted-F antenna structure to be removed from the device for rework or repair.

Hybrid Antennas For Electronic Devices
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US Patent:

8259017, Sep 4, 2012
Filed:

Dec 22, 2011
Appl. No.:

13/335714
Inventors:

Robert W. Schlub - Campbell CA, US
Qingxiang Li - Mountain View CA, US
Juan Zavala - Watsonville CA, US
Robert J. Hill - Salinas CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H01Q 1/24
US Classification:

343702, 343700 MS
Abstract:

A portable electronic device is provided that has a hybrid antenna. The hybrid antenna may include a slot antenna structure and a planar inverted-F antenna structure. The planar inverted-F antenna structure may be formed from traces on a flex circuit substrate. A backside trace may form a series capacitance for the planar inverted-F antenna structure. The antenna slot may have a perimeter that is defined by the location of conductive structures such as flex circuits, metal housing structures, a conductive bezel, printed circuit board ground conductors, and electrical components. Springs may be used in electrically connecting these conductive elements. A spring-loaded pin may be used as part of an antenna feed conductor. The pin may connect a transmission line path on a printed circuit board to the planar inverted-F antenna structure while allowing the planar inverted-F antenna structure to be removed from the device for rework or repair.

Bezel Gap Antennas
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US Patent:

8270914, Sep 18, 2012
Filed:

Dec 3, 2009
Appl. No.:

12/630756
Inventors:

Mattia Pascolini - Campbell CA, US
Robert J. Hill - Salinas CA, US
Juan Zavala - Watsonville CA, US
Qingxiang Li - Mountain View CA, US
Robert W. Schlub - Campbell CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H04B 1/38
US Classification:

455 902, 4555757, 455 903, 455107, 4555521, 4555621, 343702
Abstract:

Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. A parallel-fed loop antenna may be formed from portions of an electronic device bezel and a ground plane. The antenna may operate in multiple communications bands. An impedance matching circuit for the antenna may be formed from a parallel-connected inductive element and a series-connected capacitive element. The bezel may surround a peripheral portion of a display that is mounted to the front of an electronic device. The bezel may contain a gap. Antenna feed terminals for the antenna may be located on opposing sides of the gap. The inductive element may bridge the gap and the antenna feed terminals. The capacitive element may be connected in series between one of the antenna feed terminals and a conductor in a transmission line located between the transceiver circuitry and the antenna.

Electronic Devices With Parasitic Antenna Resonating Elements That Reduce Near Field Radiation
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US Patent:

8427376, Apr 23, 2013
Filed:

Dec 7, 2009
Appl. No.:

12/632697
Inventors:

Robert W. Schlub - Campbell CA, US
David T. Amm - Sunnyvale CA, US
Omar S. Leung - Palo Alto CA, US
Brian M. King - Santa Cruz CA, US
Qingxiang Li - Mountain View CA, US
Enrique Ayala Vazquez - Watsonville CA, US
Rodney Andres Gomez Angulo - Sunnyvale CA, US
Yi Jiang - Sunnyvale CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H01Q 1/24
US Classification:

343702, 343872, 343873
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.

Electronic Devices With Capacitive Proximity Sensors For Proximity-Based Radio-Frequency Power Control
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US Patent:

8432322, Apr 30, 2013
Filed:

Dec 7, 2009
Appl. No.:

12/632695
Inventors:

David T. Amm - Sunnyvale CA, US
Robert W. Schlub - Campbell CA, US
Omar S. Leung - Palo Alto CA, US
Brian M. King - Santa Cruz CA, US
Qingxiang Li - Mountain View CA, US
Enrique Ayala Vazquez - Watsonville CA, US
Rodney Andres Gomez Angulo - Sunnyvale CA, US
Yi Jiang - Sunnyvale CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H01Q 1/24
US Classification:

343702, 343872, 324658
Abstract:

An electronic device may have a housing in which an antenna is mounted. An 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 capacitive proximity sensor may be used in detecting external objects in the vicinity of the antenna. The proximity sensor may have conductive layers separated by a dielectric. A capacitance-to-digital converter may be coupled to the proximity sensor by inductors. The capacitive proximity sensor may be interposed between an antenna resonating element and the antenna window. The capacitive proximity sensor may serve as a parasitic antenna resonating element and may be coupled to the housing by a capacitor.

Electronic Devices With Parasitic Antenna Resonating Elements That Reduce Near Field Radiation
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US Patent:

8466839, Jun 18, 2013
Filed:

Dec 7, 2009
Appl. No.:

12/632697
Inventors:

Robert W. Schlub - Campbell CA, US
David T. Amm - Sunnyvale CA, US
Omar S. Leung - Palo Alto CA, US
Brian M. King - Santa Cruz CA, US
Qingxiang Li - Mountain View CA, US
Enrique Ayala Vazquez - Watsonville CA, US
Rodney Andres Gomez Angulo - Sunnyvale CA, US
Yi Jiang - Sunnyvale CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H01Q 1/24
US Classification:

343702, 343872, 343873
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.

Methods For Manufacturing Devices With Flex Circuits And Radio-Frequency Cables
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US Patent:

8560262, Oct 15, 2013
Filed:

Dec 16, 2010
Appl. No.:

12/969957
Inventors:

Mattia Pascolini - Campbell CA, US
Qingxiang Li - Mountain View CA, US
Dean Darnell - San Jose CA, US
Robert W. Schlub - Cupertino CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

G06F 19/00
US Classification:

702117
Abstract:

A flex circuit may have test structures and antenna structures. The test structures may include test capacitors and transmission lines. The performance of the test structures may be measured using test equipment. Pass/fail criteria may be applied to the flex circuit based on the measured values. If the flex circuit is a failing circuit, flex circuit manufacturing settings may be adjusted. The performance of a radio-frequency (RF) cable may also be measured using the test equipment. Sample portions of the RF cable may be obtained and measured. Pass/fail criteria may be applied to the RF cable based on measured cable loss values. If the RF cable is a failing cable, RF cable manufacturing settings may be adjusted. Antenna structures associated with passing flex circuits and RF cable segments associated with passing sample RF cable segments may be incorporated into a wireless device during production device assembly.

Antenna With Integrated Proximity Sensor For Proximity-Based Radio-Frequency Power Control
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US Patent:

8577289, Nov 5, 2013
Filed:

Feb 17, 2011
Appl. No.:

13/029581
Inventors:

Robert W. Schlub - Cupertino CA, US
Yi Jiang - Sunnyvale CA, US
Qingxiang Li - Mountain View CA, US
Jiang Zhu - Sunnyvale CA, US
Ruben Caballero - San Jose CA, US
Assignee:

Apple Inc. - Cupertino CA
International Classification:

H04B 5/00
US Classification:

455 411, 343702, 343872, 379 44, 379388
Abstract:

An electronic device may have a housing in which an antenna is mounted. An 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 capacitive proximity sensor may be used in detecting external objects in the vicinity of the antenna. The proximity sensor and the antenna may be formed using integral antenna resonating element and proximity sensor capacitor electrode structures. These structures may be formed from identical first and second patterned conductive layers on opposing sides of a dielectric substrate. A transceiver and proximity sensor may be coupled to the structures through respective high-pass and low-pass circuits.