Patents by Inventor Philip Pak-Lin Kwan

Philip Pak-Lin Kwan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8692732
    Abstract: An example antenna includes a first end portion, a second end portion, and an intermediate portion between the first end portion and the second end portion. The intermediate portion includes multiple folds. The second end portion includes a first conductor to couple with a communication interface of a communication module, and a second conductor to couple with a ground.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: April 8, 2014
    Assignee: Purlieu Wireless Ltd. LLC
    Inventors: Philip Pak-Lin Kwan, Paul Beard
  • Publication number: 20110316756
    Abstract: An example antenna includes a first end portion, a second end portion, and an intermediate portion between the first end portion and the second end portion. The intermediate portion includes multiple folds. The second end portion includes a first conductor to couple with a communication interface of a communication module, and a second conductor to couple with a ground.
    Type: Application
    Filed: May 3, 2011
    Publication date: December 29, 2011
    Applicant: Cypress Semiconductor Corporation
    Inventors: Philip Pak-Lin Kwan, Paul Beard
  • Patent number: 7936318
    Abstract: A wireless device has a module with a communications port and an antenna electrically coupled to the communications port, the antenna having multiple folds. The antenna has a shunt stub connected to a ground plane and a radiating portion that has multiple folds, or wiggles, allowing good electrical performance to be achieved with a minimal size.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: May 3, 2011
    Assignee: Cypress Semiconductor Corporation
    Inventors: Philip Pak-Lin Kwan, Paul Beard
  • Publication number: 20060170598
    Abstract: A wireless device has a module with a communications port and an antenna electrically coupled to the communications port, the antenna having multiple folds. The antenna has a shunt stub connected to a ground plane and a radiating portion that has multiple folds, or wiggles, allowing good electrical performance to be achieved with a minimal size.
    Type: Application
    Filed: February 1, 2005
    Publication date: August 3, 2006
    Inventors: Philip Pak-Lin Kwan, Paul Beard
  • Patent number: 5726610
    Abstract: A full duplex radio (10) having improved properties is obtained by using asymmetric surface acoustic wave (SAW) filters (70, 92, 100, 100', 112). The filters (70, 92, 100, 100', 112) are composed of series (50.sub.1, 50.sub.1 ') and parallel (50.sub.2, 50.sub.2 ') coupled SAW resonators. Asymmetry is obtained by covering either of the series (50.sub.1, 50.sub.1 ') or parallel (50.sub.2, 50.sub.2 ') resonators of each filter (70, 92, 100, 100', 112) with a dielectric layer (96) to increase the SAW coupling coefficient (Cs, Cp) of the covered resonators (50.sub.1 ', 50.sub.2 ') relative to the uncovered resonators (50.sub.1, 50.sub.2). The filters (70, 92, 100, 100', 112) are desirably in pairs arranged with mirror image frequency asymmetry such that the steeper skirts (87, 79) of the frequency response (91', 91") are adjacent. Greater pass-band bandwidths (77, 77', 77") can be obtained without adverse affect on transmitter and receiver isolation.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: March 10, 1998
    Assignee: Motorola Inc.
    Inventors: Donald Eugene Allen, Philip Pak-Lin Kwan, David Patrick Stumbo
  • Patent number: 5654680
    Abstract: A full duplex radio (10) having improved properties obtained by using surface acoustic wave (SAW) filters (92, 100, 100') having asymmetric frequency responses (76', 76", 140). The filters (92, 100, 100') are composed of series (50.sub.1, 50.sub.1 ') and parallel (50.sub.2, 50.sub.2 ') coupled SAW resonators. Asymmetry is obtained by altering the metallization thickness of either of the series (50.sub.1, 50.sub.1 ') or parallel (50.sub.2, 50.sub.2 ') resonators of each filter (92, 100, 100') to increase or decrease the SAW coupling coefficient of some of the resonators (50.sub.1, 50.sub.1 ', 50.sub.2, 50.sub.2 ') relative to the remainder of the resonators (50.sub.1, 50.sub.1 ', 50.sub.2, 50.sub.2 '). The filters (92, 100, 100') are desirably in pairs arranged with mirror image frequency asymmetry such that the steeper skirts (93, 95) of the frequency responses (76', 76", 140) are adjacent. Greater passband bandwidths (91', 91") can be obtained without adverse affect on transmitter and receiver isolation.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: August 5, 1997
    Assignee: Motorola, Inc.
    Inventors: Philip Pak-Lin Kwan, Ali-Reza Baghai-Wadji, David Penunuri