Patents by Inventor Mallavalli L. Subramanya

Mallavalli L. Subramanya 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).

  • Multiband antenna system for operating at L-band, S-band and UHF-band
    Patent number: 5572227
    Abstract: A multiband antenna system for operating at L-band, S-band and UHF-band. The antenna includes L-band antenna elements and S-band antenna elements provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator. UHF band antenna elements are provided in the form of a cage dipole on the surface of the hollow cylindrical insulator. The L-band antenna input is connected to a first connector through an L-band feed network card. The S-band antenna input is connected to a second connector through an S-band feed network card and the UHF-band antenna input is connected to a third connector through a split sheath balun provided along the axis of the hollow cylindrical insulator.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: November 5, 1996
    Assignee: Indian Space Research Organisation
    Inventors: Surendra Pal, Vodralli K. Lakshmeesha, Vaidyanathan Mahadevan, Lourdnathan Nicholas, Kunhambu Sadanandan, Subramaniam Aswathnarayan, Manickam Kumar, Mallavalli L. Subramanya, Venkatagiri Subrahmanya, Changantidurga V. Subramanyam, Thammaiahappa Mallikarjunaiah