Patents by Inventor Keith G. Balmain

Keith G. Balmain 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: 6859114
    Abstract: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave, having a wavelength greater than the linear dimension and traveling along the axis of the transmission line, the effective permeability and permittivity of the metamaterial are simultaneously negative. Applications for the metameterial are also disclosed.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: February 22, 2005
    Inventors: George V. Eleftheriades, Keith G. Balmain
  • Patent number: 6844714
    Abstract: The present invention provides a charge monitor for satellites for monitoring build up of electric charge due to charge particle fluxes impinging on the satellite. In one aspect of the invention the charge monitor includes an electrically conducting housing including at least two compartments with each compartment including a dielectric slab contained therein. An electrically conducting electrode is embedded in each dielectric slab a pre-selected distance below a top surface of the dielectric slab, the housing being mountable on a satellite with the top surface of the dielectric slab facing outwardly into space away from the satellite whereby charged particles emitted from sources external to the satellite penetrate the dielectric slab resulting in charge accumulation in each electrically conducting electrode, each electrically conducting electrode being electrically isolated from all other electrically conducting electrodes in the electrically conducting housing.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: January 18, 2005
    Inventors: Keith G. Balmain, Peter C. Kremer, Gerald R. Dubois
  • Publication number: 20040166814
    Abstract: The present invention provides a charge monitor for satellites for monitoring build up of electric charge due to charge particle fluxes impinging on the satellite. In one aspect of the invention the charge monitor includes an electrically conducting housing including at least two compartments with each compartment including a dielectric slab contained therein. An electrically conducting electrode is embedded in each dielectric slab a pre-selected distance below a top surface of the dielectric slab, the housing being mountable on a satellite with the top surface of the dielectric slab facing outwardly into space away from the satellite whereby charged particles emitted from sources external to the satellite penetrate the dielectric slab resulting in charge accumulation in each electrically conducting electrode, each electrically conducting electrode being electrically isolated from all other electrically conducting electrodes in the electrically conducting housing.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Inventors: Keith G. Balmain, Peter C. Kremer, Gerald R. Dubois
  • Publication number: 20040066251
    Abstract: A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave, having a wavelength greater than the linear dimension and traveling along the axis of the transmission line, the effective permeability and permittivity of the metamaterial are simultaneously negative. Applications for the metameterial are also disclosed.
    Type: Application
    Filed: June 2, 2003
    Publication date: April 8, 2004
    Inventors: George V. Eleftheriades, Keith G. Balmain
  • Patent number: 6361869
    Abstract: The present invention provides a method and materials for reducing or limiting charge accumulation and the resulting arc discharges in components used in space vehicles such as satellites prone to charge buildup due to exposure to a charge flux. The material is found in the poly(metallocene) family. In each member of this family, a metal atom is an integral part of the polymer chain, the whole structure being held together (and the interactions provided) by chemical bonds rather than by the proximity of the components in a heterogeneous mechanical mixture. In a homogeneous dielectric, the needed conductivity may be radiation-induced or it may be achieved as the result of doping. The components may be coated with, or alternatively fabricated from, a material including the poly(metallocene) as a constituent.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: March 26, 2002
    Inventors: Ian Manners, Keith G. Balmain, Charles H. Hersom