Patents by Inventor Lih-Tynh Hwang

Lih-Tynh Hwang 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).

  • Active phase switchable array
    Patent number: 10601132
    Abstract: An active phase switchable array includes a plurality of antenna elements and a bias circuit. Each of the radar elements includes an antenna, a power coupling network and an injection-locked oscillator (ILO), and each of the antenna elements is coupled with each other through the power coupling networks for operating the ILO of each of the antenna elements in self- and mutual-injection-locked states. The antenna elements in self-injection-locked state are utilized to detect the vital signs of subjects, and the antenna elements in mutual-injection-locked state are utilized to produce phase difference between the radiating signals of the antenna elements for forming a beam. As a result, the active phase switchable array can simultaneously detect the vital signs of multiple subjects.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: March 24, 2020
    Assignee: NATIONAL SUN YAT-SEN UNIVERSITY
    Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Lih-Tynh Hwang, Chung-Yi Hsu, Cho-Ying Chuang
  • ACTIVE PHASE SWITCHABLE ARRAY
    Publication number: 20180083358
    Abstract: An active phase switchable array includes a plurality of antenna elements and a bias circuit. Each of the radar elements includes an antenna, a power coupling network and an injection-locked oscillator (ILO), and each of the antenna elements is coupled with each other through the power coupling networks for operating the ILO of each of the antenna elements in self- and mutual-injection-locked states. The antenna elements in self-injection-locked state are utilized to detect the vital signs of subjects, and the antenna elements in mutual-injection-locked state are utilized to produce phase difference between the radiating signals of the antenna elements for forming a beam. As a result, the active phase switchable array can simultaneously detect the vital signs of multiple subjects.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 22, 2018
    Inventors: Fu-Kang Wang, Tzyy-Sheng Horng, Lih-Tynh Hwang, Chung-Yi Hsu, Cho-Ying Chuang