Yiu K. Chan - Woodinville WA Dale Schwent - Schaumburg IL Michael Landherr - Cary IL Armin Klomsdorf - Spring Grove IL Michael Hand - Boca Raton FL
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
H04B 138
US Classification:
455553, 455115, 455127, 333109, 330126
Abstract:
A radio frequency (RF) coupler apparatus ( ) suited for use in a multi-band wireless communication device ( ), has a termination device ( ) and couplers ( and ). Each of the couplers ( and ) has through-path coupling elements ( and ) and coupled-path coupling elements ( and ). Through-path coupling elements ( and ) pass a RF signal that is to be transmitted respective frequency bands (TX BAND , TX BAND ) within which the device ( ) operates. Coupled-path coupling elements ( and ) couple the RF signals passed by respective through-path coupling elements ( and ). The coupled-path coupling elements ( and ) and the termination device ( ) are coupled in series, thereby permitting compatibilty with a RF power detector ( ) that uses a single detection diode ( ).
An antenna system () comprising a first electromagnetic radiator () and a second electromagnetic radiator () is provided. The first electromagnetic radiator incorporates an off-center series feed () at a pre-defined distance from a first end () of the antenna system. The second electromagnetic radiator incorporates a shunt feed () at a second pre-defined distance from a second end () of the antenna system. The first electromagnetic radiator is used primarily for plural band transmission-reception and the second electromagnetic radiator for antenna diversity band reception.
Portable Device And Method Employing Beam Selection To Obtain Satellite Network Positioning Signals
Minh H. Duong - Lake Bluff IL, US Alan Boorom - Mundelein IL, US Yiu K. Chan - Vernon Hills IL, US
International Classification:
H01Q 3/12
US Classification:
342374, 34235715, 342419
Abstract:
A portable device, such as a handheld device (), laptop device or other suitable portable device, employs an antenna beam selection structure that is coupled to a plurality of built-in antennas ( and ) of the portable device that have different beam angles with respect to each other. The plurality of built-in antennas are coupled to a satellite network positioning signal processing circuit () so that device positioning signals from a satellite network can be received and processed by the device. The plurality of built in antennas may be stationary or movable with respect to each other. A control circuit () is operative to control switching between each of the plurality of built in antennas based on detected signal strength, signal quality measurements, the number of positioning satellites detected by a satellite network positioning signal processing circuit or other suitable criteria.
Yiu K. Chan - Vernon Hills IL, US Antonio Faraone - Plantation FL, US Carlo DiNallo - Plantation FL, US Istvan J. Szini - Grayslake IL, US
Assignee:
Motorola Inc. - Schaumburg IL
International Classification:
H01Q 1/24
US Classification:
343702
Abstract:
A wireless communication device () with an antenna system () is disclosed. The antenna system () is an internal antenna with broadband characteristics which provides coverage over multiple frequency bands. The antenna system () has a finite ground surface (), an elongated conductor () supported by a dielectric spacer (), and at least one series signal feed ().
Wireless Communication Device Having Electromagnetic Compatibility For Hearing Aid Devices
Yiu K. Chan - Vernon Hills IL, US Joselito C. Gavilan - Elk Grove Village IL, US Jin D. Kim - Pleasant Prairie WI, US
Assignee:
Motorola Inc. - Schaumburg IL
International Classification:
H04B 1/38
US Classification:
4555753, 455 903, 379 52
Abstract:
A wireless communication device for minimizing electromagnetic interference with hearing aid devices. The wireless communication device comprises a lower housing () and an upper housing () adjacent to the lower housing. The lower housing () supports a wireless transceiver () capable of producing an electromagnetic field, and the upper housing includes an ear piece (). For one embodiment the upper housing () and all components supported by the upper housing consist of non-electromagnetic conductive material. For other embodiments, all electromagnetic conductive components of the upper housing () are restricted to an area adjacent to an ear piece () of the upper housing.
Aviv Shachar - Ramat-Gan, IL Yiu K. Chan - Vernon Hills IL, US Motti Elkobi - Natanya, IL
Assignee:
Motorola Solutions, Inc. - Schaumburg IL
International Classification:
H01Q 21/30
US Classification:
343848, 343893, 343702
Abstract:
A dual-band antenna includes a first antenna element having a generally “J” shaped element, and a second antenna element having a generally “h” shaped element. The first antenna element and the second antenna element share a common feed point and each antenna element is oriented substantially perpendicular to the other. The first antenna element and the second antenna element, in one implementation, are adapted to efficiently operate the dual-band antenna at approximately 1575 MHz and approximately 850 MHz, respectively.
An antenna () is provided, which can be used in a wireless communication device or a base transceiver station forming part of the infrastructure of a wireless communication system. The antenna includes a first plate conductor () and a second plate conductor (), which are substantially symmetric. The first plate conductor and the second plate conductor are separated by a central slot () and include respective primary feed points proximate the central slot, which are adapted for receiving a differential signal from a differential signal source (). The first plate conductor and the second plate conductor exhibit at least a first frequency response (F) and a second frequency response (F) dependent on various dimensions of both the first plate conductor and the second plate conductor, relative to their respective primary feed point.
Aviv Shachar - Ramat-Gan, IL Yiu Kwong Chan - Vernon Hills IL, US Motti Elkobi - Natanya, IL
International Classification:
H01Q 13/10
US Classification:
343767
Abstract:
An antenna including a main span extending in a first direction, a first arm extending from the main span in a second direction substantially perpendicular to the first direction, a second arm extending from the main span in a third direction substantially opposite the second direction, a disc portion with a center substantially disposed at an intersection of the main span and the second arm, and a slot having a plurality of portions.
Name / Title
Company / Classification
Phones & Addresses
Yiu Chan Principal
Chan Yiu Fu Business Services at Non-Commercial Site
Amazon Web Services
Sde
Amazon Jan 2017 - Apr 2018
Sde, Nexus
Amazon Sep 2013 - Jan 2017
Sde, Shoppngcart
Education:
The Hong Kong University of Science and Technology 2011 - 2013
Masters, Computer Science, Engineering, Computer Science and Engineering, Philosophy
The Hong Kong University of Science and Technology 2008 - 2011
Bachelors, Bachelor of Science, Computer Science and Mathematics, Mathematics, Computer Science
Skills:
Mathematics Html Programming Java Computer Science Software Development Computational Geometry Linux Algorithms Software Engineering Javascript C++ Jquery Object Oriented Design Underscore.js Perl Css
Interests:
Snow Board Taekwondo Table Tennis Gym
Languages:
Cantonese Mandarin English
Certifications:
Code School Anatomy of Backbone.js Anatomy of Backbone.js Part 2 Shaping-Up-With-Angular-Js Staying-Sharp-With-Angular-Js Real-Time-Web-With-Node-Js Building-Blocks-Of-Express-Js Blasting-Off-With-Bootstrap Css Cross-Country
Controller At Stroum Jewish Community Center Of Greater Seattle
Additional study authors include Laura Riva, Lars Pache, Naoko Matsunaga and Yuan Pu of Sanford Burnham Prebys; Chris Chun-Yiu Chan, Pok-Man Lai, Chris Chung-Sing Chan, Vincent Kwok-Man Poon, Andrew Chak-Yiu Lee, Chun-Kit Yuen, Jianli Cao, Ronghui Liang, Kaiming Tang, Wan Xu, Chit-Ying Lau, Ko-Yung