Qingxiang Li

US Patent:

20130154897, Jun 20, 2013

Filed:

Dec 20, 2011

Appl. No.:

13/332193

Inventors:

Robert S. Sorensen - Fremont CA, US
Qingxiang Li - Mountain View CA, US
Matthew A. Mow - Los Altos CA, US
Jinku Kim - Cupertino CA, US

International Classification:

H01Q 1/50

US Classification:

343861

Abstract:

An electronic device may include an adjustable power supply, at least one antenna, and associated antenna tuning circuitry. The antenna tuning circuitry may be an integral part of the antenna and may include a control circuit and at least one tunable element. The tunable element may include radio-frequency switches, continuously/semi-continuously adjustable components such as tunable resistors, inductors, and capacitors, and other load circuits that provide desired impedance characteristics. The power supply may provide power supply voltage signals to the antenna tuning circuitry via inductive coupling. The power supply voltage signals may be modulated according to a predetermined lookup table during device startup so that the control circuit is configured to generate desired control signals. These control signals adjust the tunable element so that the antenna can support wireless operation in desired frequency bands.

US Patent:

20130335275, Dec 19, 2013

Filed:

Jun 15, 2012

Appl. No.:

13/524997

Inventors:

Emery A. Sanford - San Francisco CA, US
Qingxiang Li - Mountain View CA, US
Lijun Zhang - San Jose CA, US
Anthony S. Montevirgen - San Francisco CA, US
Teodor Dabov - San Francisco CA, US
Erik G.P. de Jong - San Francisco CA, US
Wey-Jiun Lin - Los Altos Hills CA, US

International Classification:

H01Q 1/52
H01P 11/00
H05K 9/00
H01Q 1/24
H01Q 1/12

US Classification:

343702, 343841, 343878, 174350, 29600

Abstract:

An electronic device may be provided with a conductive housing. An antenna window structure may be formed in an opening in the housing. The antenna window structure may have an antenna support structure that is attached to the conductive housing and that supports antenna structures. An antenna window cap may be mounted in the opening and attached to the antenna support structure with liquid adhesive. Alignment structures may be provided in the antenna support structure. An antenna support plate with mating alignment structures may be used in attaching the antenna structures to the antenna support structures. Metal shielding structures may be used to provide electromagnetic shielding. A shielding wall may be formed from a sheet metal structure supported by a plastic support structure. A flexible metal shielding foil layer may be welded to the shielding wall using a sacrificial plate.

US Patent:

20170010697, Jan 12, 2017

Filed:

Jul 6, 2015

Appl. No.:

14/792516

Inventors:

- Cupertino CA, US
Huan-Chu Huang - Luzhu City, TW
Mattia Pascolini - San Francisco CA, US
Qingxiang Li - Mountain View CA, US

International Classification:

G06F 3/0354

Abstract:

A computer stylus may have an elongated body with a tip and an opposing end having components such as a connector and an antenna. Metal structures for the antenna may be supported using a molded plastic support with metal traces or may be formed using flexible printed circuits or other structures. Metal and plastic tubes may be used in forming the body of the stylus. A metal tube may have an opening in which an antenna is mounted. A plastic tube may serve as an outer housing for the stylus and may cover the metal tube and the opening in which the antenna is mounted. A transmission line such as a cable may be coupled to an antenna feed. The cable may pass through an opening in the metal tube and may be covered using a strip of conductive foam.

US Patent:

20140185857, Jul 3, 2014

Filed:

Mar 4, 2014

Appl. No.:

14/195974

Inventors:

- Cupertino CA, US
Jeremy C. Franklin - San Franciso CA, US
Stephen C. McClure - San Francisco CA, US
Sean S. Corbin - San Jose CA, US
Qingxiang Li - Mountain View CA, US
Rodney A. Gomez Angulo - Sunnyvale CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H01Q 1/24
H04R 1/02

US Classification:

381388, 381394, 29600

Abstract:

A portable computing device is disclosed. The portable computing device can take many forms such as a laptop computer, a tablet computer, and so on. The portable computing device can include a single piece housing formed from a radio opaque material with a cover formed from a radio transparent material. To implement a wireless interface, an antenna stack-up can be provided that allows an antenna to be mounted to a bottom of the cover. Methods and apparatus are provided for improving wireless performance. For instance, in one embodiment, a metal housing can be thinned to improve antenna performance. As another example, a faraday cage can be formed around speaker drivers to improve antenna performance.