Patents by Inventor David Gerald Blair

David Gerald Blair 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).

  • Dielectrically loaded cavity resonator
    Patent number: 5990767
    Abstract: A method of producing a microwave resonator comprising a cavity (50) defined, at least in part, by a generally cylindrical wall (64) having an electrically conductive inner surface and containing a generally cylindrical piece of low loss dielectric material (22), characterised by forming a generally cylindrical piece of low loss dielectric material of predetermined size and placing same in a cavity to produce a microwave resonator which operates in a particular mode at a specific frequency at a particular temperature. Microwave radiation corresponding to a further operating mode is then passed into the cavity and then the frequency corresponding to the further operating mode is searched for and measured. A further generally cylindrical piece of dielectric material is produced by scaling from the first piece of dielectric material according to the ratio between the first and second frequencies.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: November 23, 1999
    Assignees: Poseidon Scientific Instruments Pty Ltd, University of Western Australia
    Inventors: Eugene Nikolay Ivanov, David Gerald Blair, Michael Edmund Tobar, Jesse Hyuck Searls, Simon John Edwards
  • Dielectrically loaded cavity resonator
    Patent number: 5714920
    Abstract: A method of producing a microwave resonator comprising a cavity (50) defined, at least in part, by a generally cylindrical wall (64) having an electrically conductive inner surface and containing a generally cylindrical piece of low loss dielectric material (22), characterized by forming a generally cylindrical piece of low loss dielectric material of predetermined size and placing same in a cavity to produce a microwave resonator which operates in a particular mode at a specific frequency at a particular temperature. Microwave radiation corresponding to a further operating mode is then passed into the cavity and then the frequency corresponding to the further operating mode is searched for and measured. A further generally cylindrical piece of dielectric material is produced by scaling from the first piece of dielectric material according to the ratio between the first and second frequencies.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: February 3, 1998
    Assignees: Poseidon Scientific Instruments Pty Ltd., The University of Western Australia
    Inventors: Eugene Nikolay Ivanov, David Gerald Blair, Michael Edmund Tobar, Jesse Hyuck Searls, Simon John Edwards