Patents by Inventor Anhtuan Trandai

Anhtuan Trandai 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: 6127979
    Abstract: The present disclosure is related to an antenna (129) adapted to receive signals in multiple frequency bands, and comprises a fixed whip antenna (406) and a helical coil antenna (408) coupled to a single feedpoint. The antenna may also include a monopole common to the fixed whip antenna and the helical coil antenna. A single matching circuit (130) is adapted to provide matching for both the whip antenna and the helical coil antenna. According to one embodiment, the antenna can also be reduced in size by attaching a disc (704) to the end of the whip portion of the antenna, while decreasing the pitch of the helical coil. Finally, a clip (210) can be used below a threaded nut of a housing to provide a feed point for the antenna to further reduce the electrical lengths of the fixed whip antenna and a helical coil antenna.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: October 3, 2000
    Assignee: Motorola, Inc.
    Inventors: Guangping Zhou, Robert Kenoun, Zhengping Ding, Wayne Huang, Anhtuan Trandai, Daniel P. Groebe
  • Patent number: 5893036
    Abstract: A transmission power control method subdivides one or more transmission power steps as defined in a system specification into multiple sub-steps. A base station (290) instructs a mobile station (280) to use a defined power step, and the mobile station (280) initially selects a maximum power sub-step within the requested power step during an initial RACH (225) transmission. During the duration of the call, the mobile station (280) dynamically adjusts the power sub-step based on measured signal reception quality and channel conditions. The result is an improvement in call completion rates with only a minor reduction in battery life.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: April 6, 1999
    Assignee: Motorola, Inc.
    Inventors: Anhtuan Trandai, Hugh Wang, Wayne Huang, Gang Sun, Gregory R. Black, James G. Haerle