Patents by Inventor David Roy Hill

David Roy Hill 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).

  • Wide bandwidth antenna arrays
    Patent number: 5900844
    Abstract: A skewed Log Periodic Dipole Array (LPDA) used as the element in a linear or planar array, serves to remove the element spacing restriction and hence eliminates the grating lobe problem. The skewed form of the device has all dipoles greater in length than the shortest one, i.e. the highest frequency one, skewed such that they are "Z" shaped. When the angle between the end and center segments of the Z dipole is 90 degrees, the skewed LPDA has a constant width equal to the length of the highest frequency dipole.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 4, 1999
    Assignee: British Aerospace Defence Systems, Ltd.
    Inventor: David Roy Hill