Patents by Inventor Stuart Dean

Stuart Dean 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).

  • Frequency reuse scheme for point to multipoint radio communication
    Patent number: 6542746
    Abstract: The invention provides frequency reuse techniques to enable fractional frequency reuse to be achieved for various cellular radio deployment grids, even for high order modulation such as 16 QAM and 64 QAM by the use of controlled and coordinated notched antenna patterns. The technique allows all frequencies to be used in all cells, thus maximizing system capacity while minimizing and controlling adjacent cell interference by the use of notched antenna patterns.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 1, 2003
    Assignee: Nortel Networks Limited
    Inventor: Stuart Dean
  • Frequency reuse in millimeter-wave point-to-multipoint radio systems
    Patent number: 6421542
    Abstract: A millimeter-wave point-to-multipoint LMDS radio system for broadband wireless access having frequency reuse that includes a cell area divided into an integer number k sub-sectors of equal angular arc 360/k degrees each; a hub having antennas each configured to generate an antenna beam that covers an integer number j sub-sectors, an angular gap i being defined between edges of coverage of one of the antennas where i is an integer number of sub-sectors; a total integer number of n channel sets each of at least one radio channel and each configured independent and free of interference from other ones of the channels in other ones of the channel sets, each of the channel sets having a number of uses defined by a quantity k/(i+j) that is an integer equal or greater than two, each channel set being deployed with a common re-use pattern with an angular stagger between antennas of (i+j)/n sub-sectors.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: July 16, 2002
    Assignee: Nortel Networks Limited
    Inventors: Howard M. Sandler, Stuart Dean, Paul Astell
  • Antenna assembly
    Patent number: 5990835
    Abstract: The present invention relates to integral antenna assemblies and in particular relates to an integral antenna assembly for microcellular base stations and fixed wireless access base stations. In accordance with one aspect of the invention, there is provided an integral antenna comprising a radome, a layered antenna and a reflector back plane, wherein the layered antenna has an outer surface and a rear surface; wherein the radome is attached directly to an outer surface of the antenna; and wherein the back plane provides a reflective cavity and encloses the feed network for the antenna and is attached to the rear surface of the antenna.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: November 23, 1999
    Assignee: Northern Telecom Limited
    Inventors: Tilmann Kuntzsch, Stuart Dean, Michael Leonard Purdy