Patents by Inventor Mohammed N. Afsar

Mohammed N. Afsar 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).

  • System method and apparatus including hybrid spiral antenna
    Patent number: 10381719
    Abstract: A spiral antenna device includes a plurality of generally polygonal loops. The polygonal loops have respective side counts that decrease progressively as a function of the loop's radial distance from a center of the antenna device. The side count may vary between loops as a multiple of a power of two.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: August 13, 2019
    Assignee: Trustees of Tufts College
    Inventors: Nahid Rahman, Mohammed N. Afsar
  • SYSTEM METHOD AND APPARATUS INCLUDING HYBRID SPIRAL ANTENNA
    Publication number: 20170338551
    Abstract: A spiral antenna device includes a plurality of generally polygonal loops. The polygonal loops have respective side counts that decrease progressively as a function of the loop's radial distance from a center of the antenna device. The side count may vary between loops as a multiple of a power of two.
    Type: Application
    Filed: March 6, 2017
    Publication date: November 23, 2017
    Inventors: Nahid RAHMAN, Mohammed N. AFSAR
  • System, method and apparatus including hybrid spiral antenna
    Patent number: 9608317
    Abstract: A spiral antenna device includes a plurality of generally polygonal loops. The polygonal loops have respective side counts that decrease progressively as a function of the loop's radial distance from a center of the antenna device. The side count may vary between loops as a multiple of a power of two.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: March 28, 2017
    Assignee: Trustees of Tufts College
    Inventors: Nahid Rahman, Mohammed N. Afsar
  • Millimeter wave 3-D breast imaging
    Patent number: 8948847
    Abstract: A system for imaging tissue includes a millimeter wave Quasi-optical backward wave oscillator. Tumorous tissue is detected in a reconstructed image using solvable inverse image reconstruction techniques. In one embodiment, three-dimensional breast imaging is enabled by providing radiation as a focused energy beam over a wide frequency range and at power levels to penetrate breast tissue disposed within dielectric compression plates.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: February 3, 2015
    Assignee: Tufts University
    Inventors: Mohammed N. Afsar, Liu Chao
  • SYSTEM, METHOD AND APPARATUS INCLUDING HYBRID SPIRAL ANTENNA
    Publication number: 20140300526
    Abstract: A spiral antenna device includes a plurality of generally polygonal loops. The polygonal loops have respective side counts that decrease progressively as a function of the loop's radial distance from a center of the antenna device. The side count may vary between loops as a multiple of a power of two.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Inventors: Nahid RAHMAN, Mohammed N. Afsar
  • Millimeter Wave 3-D Breast Imaging
    Publication number: 20130303901
    Abstract: A system for imaging tissue includes a millimeter wave Quasi-optical backward wave oscillator. Tumorous tissue is detected in a reconstructed image using solvable inverse image reconstruction techniques. In one embodiment, three-dimensional breast imaging is enabled by providing radiation as a focused energy beam over a wide frequency range and at power levels to penetrate breast tissue disposed within dielectric compression plates.
    Type: Application
    Filed: May 9, 2013
    Publication date: November 14, 2013
    Inventors: Mohammed N. Afsar, Liu Chao