Patents by Inventor Yeong-Joo Loon

Yeong-Joo Loon 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).

  • Thin-film monolithic coupled spiral balun transformer
    Patent number: 6097273
    Abstract: A balanced/unbalanced (balun) transformer has at least one pair of stacked coupled spiral lines. The spiral lines are formed on different levels of the device with the upper spiral line nested between the lower spiral line. This structure allows the width W and spacing S of the lines to be independently varied. Analysis of devices made with this configuration shows an optimum ratio of W to W+S of from 0.4 to 0.6.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: August 1, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Robert Charles Frye, Yeong-Joo Loon