Patents by Inventor Barsur Rama Rao

Barsur Rama Rao 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).

  • Spatial null steering microstrip antenna array
    Patent number: 6597316
    Abstract: A spatial null steering microstrip antenna array comprising two concentric microstrip patch antenna elements. An inner circular antenna is used as an auxiliary element in nulling interference received by an outer annular ring antenna disposed around the inner antenna. The outer annular antenna is resonant in a higher order mode but forced to generate a right hand circularly polarized lower order (TM11) far field radiation pattern, thereby allowing co-modal phase tracking between the two antenna elements for adaptive cancellation. Each antenna element is appropriately excited by symmetrically spaced probes. Other applications of the antenna array include GPS multipath suppression, simultaneous satellite and terrestrial communications, and co-site interference suppression. Dual frequency band applications are achieved by stacked array configurations.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: July 22, 2003
    Assignee: The Mitre Corporation
    Inventors: Barsur Rama Rao, Edward N. Rosario
  • Spatial null steering microstrip antenna array
    Publication number: 20030052825
    Abstract: A spatial null steering microstrip antenna array comprising two concentric microstrip patch antenna elements. An inner circular antenna is used as an auxiliary element in nulling interference received by an outer annular ring antenna disposed around the inner antenna. The outer annular antenna is resonant in a higher order mode but forced to generate a right hand circularly polarized lower order (TM11) far field radiation pattern, thereby allowing co-modal phase tracking between the two antenna elements for adaptive cancellation. Each antenna element is appropriately excited by symmetrically spaced probes. Other applications of the antenna array include GPS multipath suppression, simultaneous satellite and terrestrial communications, and co-site interference suppression. Dual frequency band applications are achieved by stacked array configurations.
    Type: Application
    Filed: September 17, 2001
    Publication date: March 20, 2003
    Inventors: Barsur Rama Rao, Edward N. Rosario