Patents by Inventor Dirk J. Braak

Dirk J. Braak 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: 4352110
    Abstract: A method for optimally siting cosine-squared antennas in an array is taught, along with the array which is produced by use of the array. The array in question utilizes a dense hexagonal cellular grid, and each individual antenna is assigned a frequency group on which the antenna operates. The cells are ordered in such a fashion as to keep co-channel interference to a minimum.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 28, 1982
    Assignee: Te Ka De Felton & Guilleaume Fernmeldeanlagen GmbH
    Inventor: Dirk J. Braak
  • Patent number: 4148038
    Abstract: A non-directional transmitting system non-directionally and simultaneously transmits four signals of different but closely spaced frequency. The system comprises four directional antennas, each oriented to face in a different respective direction, each direction being spaced from the next one. Each directional antenna simultaneously transmits one fourth of the power of each one of the four signals, making for an overall non-directional effect. The four signal sources are coupled to the four directional antennas by way of four 3-dB couplers in such a way that substantially all the power of each signal is transmitted equally to the four directional antennas, avoiding the power loss customary when plural signal sources are coupled to a common non-directional antenna using 3-dB couplers.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: April 3, 1979
    Assignee: Tekade Felten & Guilleaume Fernmeldeanlagen GmbH
    Inventor: Dirk J. Braak