Patents by Inventor Derek A. McNamara

Derek A. McNamara 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).

  • Phase element comprising a stack of alternating conductive patterns and dielectric layers providing phase shift through capacitive and inductive couplings
    Patent number: 8743000
    Abstract: A thin electromagnetic phase shifting element, named phase and amplitude shifting surface (PASS), is disclosed. The PASS is capable of independently altering both the phase and the amplitude distribution of the electromagnetic fields propagating through the structure. The element comprises a few patterned metallic layers separated by dielectric layers. The patterns of the metallic layers are tuned to locally alter the phase and/or the amplitude of an incoming electromagnetic wave to a prescribed set of desired values for the outgoing electromagnetic wave. The PASS can be applied to design components such as gratings, lenses, holograms, and various types of antennas in the microwave, millimeter wave and sub-millimeter wave.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: June 3, 2014
    Assignee: Her Majesty the Queen in Right of Canada, as Represented by the Minister of Industry, through the Communications Research Centre Canada
    Inventors: Nicolas Gagnon, Aldo Petosa, Derek A. McNamara
  • Phase element for introducing a phase shift pattern into an electromagnetic wave
    Publication number: 20110025432
    Abstract: A thin electromagnetic phase shifting element, named phase and amplitude shifting surface (PASS), is disclosed. The PASS is capable of independently altering both the phase and the amplitude distribution of the electromagnetic fields propagating through the structure. The element comprises a few patterned metallic layers separated by dielectric layers. The patterns of the metallic layers are tuned to locally alter the phase and/or the amplitude of an incoming electromagnetic wave to a prescribed set of desired values for the outgoing electromagnetic wave. The PASS can be applied to design components such as gratings, lenses, holograms, and various types of antennas in the microwave, millimetre wave and sub-millimetre wave.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 3, 2011
    Inventors: Nicolas Gagnon, Aldo Petosa, Derek A. McNamara