Patents by Inventor Hideaki Sunayama

Hideaki Sunayama 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).

  • Transmission circuit, antenna duplexer, and radio-frequency switch circuit
    Patent number: 7579929
    Abstract: A small-sized, high-performance transmission circuit is provided which avoids degradation in transmission line characteristics caused by coupling, due to a transmission line and a leader electrode to an external electrode which are oppositely facing, of the electromagnetic field induced by the transmission line and the electromagnetic field induced by the leader electrode. In order to attain the aforementioned object, the present invention comprises a first shield layer which is a first ground electrode, a second shield layer which is a second ground electrode, and a spiral-shaped transmission line facing the first shield layer and the second shield layer which is disposed between the first shield layer and the second shield layer. The spiral portion of the transmission line, when viewed from the top face or the bottom face of the transmission line, is disposed on the inside of the first shield layer and the second shield layer.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: August 25, 2009
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Osamu Hikino, Masashi Ohki, Hideaki Sunayama
  • Transmission circuit, antenna duplexer, and radio-frequency switch circuit
    Publication number: 20060290447
    Abstract: A small-sized, high-performance transmission circuit is provided which avoids degradation in transmission line characteristics caused by coupling, due to a transmission line and a leader electrode to an external electrode which are oppositely facing, of the electromagnetic field induced by the transmission line and the electromagnetic field induced by the leader electrode. In order to attain the aforementioned object, the present invention comprises a first shield layer which is a first ground electrode, a second shield layer which is a second ground electrode, and a spiral-shaped transmission line facing the first shield layer and the second shield layer which is disposed between the first shield layer and the second shield layer. The spiral portion of the transmission line, when viewed from the top face or the bottom face of the transmission line, is disposed on the inside of the first shield layer and the second shield layer.
    Type: Application
    Filed: February 27, 2006
    Publication date: December 28, 2006
    Inventors: Osamu Hikino, Masashi Ohki, Hideaki Sunayama