Marshall J Katz

US Patent:

20120211656, Aug 23, 2012

Filed:

Feb 22, 2011

Appl. No.:

13/032104

Inventors:

Marshall Joseph Katz - Palatine IL, US
Ian Peter Lewis - Grayslake IL, US

Assignee:

RESEARCH IN MOTION LIMITED - Waterloo

International Classification:

H03K 17/78
G01J 1/42
G01J 5/10

US Classification:

2503381, 250215, 250214 DC, 250372

Abstract:

A mobile device including a source for emitting electromagnetic radiation, an enclosure having a side wall, and a detector for detecting electromagnetic radiation emitted by the source is described. At least a portion of the sidewall is adapted to transmit electromagnetic radiation from the source. The source and detector are positioned inside the enclosure. The detector is spaced from the source, and is arranged to detect electromagnetic radiation from the source that is reflected from an object outside the enclosure and passes through the portion of the side wall.

US Patent:

20130342403, Dec 26, 2013

Filed:

Jun 22, 2012

Appl. No.:

13/530440

Inventors:

Marshall Joseph KATZ - Palatine IL, US

Assignee:

RESEARCH IN MOTION LIMITED - Waterloo

International Classification:

G01R 29/08

US Classification:

343703

Abstract:

A method and apparatus for testing antennas are provided. A given power level is transmitted on a first antenna of a device, via a processor. It is determined, at the processor, that the first antenna and a second antenna of the device are properly installed when received power at the second antenna is about greater than or equal to a threshold power level.

US Patent:

20130342421, Dec 26, 2013

Filed:

Jun 22, 2012

Appl. No.:

13/530394

Inventors:

Marshall Joseph KATZ - Palatine IL, US
Randy Alan WIESSNER - Palatine IL, US

International Classification:

H01Q 1/50

US Classification:

343852

Abstract:

A method and apparatus for controlling an antenna is provided. A load on a second antenna of a device is determined, the device comprising at least one processor, a first antenna, a variable tuning circuit connected to the first antenna, and the second antenna, wherein the processor determines the load. The processor controls the variable tuning circuit based on the load on the second antenna to change a match of the first antenna.

US Patent:

20140022132, Jan 23, 2014

Filed:

Jul 17, 2012

Appl. No.:

13/551248

Inventors:

Firass Mirza Badaruzzaman - Forest Park IL, US
Randy Alan Wiessner - Palatine IL, US
Marshall Joseph Katz - Palatine IL, US

Assignee:

Research In Motion Limited - Waterloo

International Classification:

H01Q 9/04

US Classification:

343745

Abstract:

A system and process that incorporates teachings of the subject disclosure may include, for example, a multiband antenna as may be used in mobile communications devices. The multiband antenna includes a feed port coupled to each of a first radiating portion and a second radiating portion. Each of the first and second radiating portions defines a respective resonant bandwidth. The multiband antenna also includes at least one adjustable tuning circuit disposed between physically isolated radiating segments of a respective one of the first and second radiating portions. Adjustment of the tuning circuit alters a corresponding resonant bandwidth allowing the corresponding resonant bandwidth to be tuned independently of the other resonant bandwidth and without affecting performance of the other resonant bandwidth. In at least some embodiments, the tuning circuit can include a tunable phase shifter having one or more components, each having a variable reactance. Other embodiments are disclosed.