Patents by Inventor Seung Hyun Ra

Seung Hyun Ra 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).

  • Triplexer and multilayered structure thereof
    Patent number: 6876840
    Abstract: A triplexer and a multilayered structure thereof. The triplexer comprises a first filter circuit and a low pass filter circuit connected in parallel to an input terminal, and a second filter circuit and a third filter circuit connected in parallel to an output terminal of the low pass filter circuit. The first filter circuit passes a signal of a first frequency band, and the low pass filter circuit passes a signal of a predetermined frequency band which is lower than the first frequency band. The second filter circuit extracts a signal of a second frequency band from the predetermined frequency band signal, and the third filter circuit extracts a signal of a third frequency band from the predetermined frequency band signal, which third frequency band is lower than the second frequency band. The low pass filter circuit includes a notch circuit for extending a portion of the predetermined frequency band, neighboring the first frequency band.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: April 5, 2005
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Yu Seon Shin, Seung Hyun Ra, Chang Yong Lee
  • Triplexer and multilayered structure thereof
    Publication number: 20030124984
    Abstract: A triplexer and a multilayered structure thereof. The triplexer comprises a first filter circuit and a low pass filter circuit connected in parallel to an input terminal, and a second filter circuit and a third filter circuit connected in parallel to an output terminal of the low pass filter circuit. The first filter circuit passes a signal of a first frequency band, and the low pass filter circuit passes a signal of a predetermined frequency band which is lower than the first frequency band. The second filter circuit extracts a signal of a second frequency band from the predetermined frequency band signal, and the third filter circuit extracts a signal of a third frequency band from the predetermined frequency band signal, which third frequency band is lower than the second frequency band. The low pass filter circuit includes a notch circuit for extending a portion of the predetermined frequency band, neighboring the first frequency band.
    Type: Application
    Filed: July 17, 2002
    Publication date: July 3, 2003
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Yu Seon Shin, Seung Hyun Ra, Chang Yong Lee