Patents by Inventor Eun Chi

Eun Chi 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).

  • Publication number: 20230275352
    Abstract: A liquid crystal-based microstrip patch antenna for widening a frequency tuning range and miniaturizing a radiating unit are provided. The microstrip patch antenna includes at least one feeding unit, at least one radiating unit, a plurality of dielectric substrates including the feeding unit and the radiating unit and formed in a stack structure, a liquid crystal cavity interposed between the plurality of dielectric substrates stacked on each other, and at least one DC bias line to receive power from a power supply and to apply an electric field to the liquid crystal cavity through the radiating unit.
    Type: Application
    Filed: October 25, 2022
    Publication date: August 31, 2023
    Inventors: Seong Ook PARK, Jinki PARK, Ye-Eun CHI
  • Publication number: 20060169945
    Abstract: The present invention relates to the macroporous manganese oxide material having ferromagnetic property and a method of preparing the same, more particularly to the macroporous ferromagnetic manganese oxide having three-dimensionally ordered nanopores, which is prepared by aligning colloidal polymer particles with an average diameter of a few hundred nanometers in 3D, infiltrating a solution of the precursor compound capable of forming manganese oxide represented by the following Chemical Formula 1 into interstices of the colloidal template and heating in an oxygen atmosphere to decompose and remove the polymer template, and a method for preparing the same: La1-xCax-ySryMnO3??(1) wherein 0.25<x<0.35 and 0<y?0.35.
    Type: Application
    Filed: April 16, 2004
    Publication date: August 3, 2006
    Inventors: Nam Hur, Young Kim, Eun Chi, Jin Kim, Eun Lee