Patents by Inventor Nai-Chen LIU

Nai-Chen LIU 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: 20210384618
    Abstract: A waveguide structure includes a dielectric layer, a plurality of circuit layers, a plurality of insulation layers, and a conductor connection layer. The dielectric layer has an opening. The circuit layers are disposed on the dielectric layer. The insulation layers and the circuit layers are alternately stacked. The conductor connection layer covers an outer wall of the opening in a direction perpendicular to the circuit layers and connects at least two circuit layers on two opposite sides of the opening. At least the conductor connection layer and a part of the circuit layers define an air cavity for transmitting signals at a position corresponding to the opening.
    Type: Application
    Filed: January 20, 2021
    Publication date: December 9, 2021
    Applicant: Subtron Technology Co., Ltd.
    Inventors: Jenn-Hwan Tarng, Nai-Chen Liu, Yin-Kai Lin, Tsung-Han Lee, Chao-Wei Chang
  • Patent number: 11145983
    Abstract: A dual-polarized patch antenna includes a first insulating substrate; conductive connections, each of which passes through the first insulating substrate, and which are arranged to form a resonant cavity and two feeding ports; first and second metal layers respectively disposed on two opposite surfaces of the first insulating substrate, the second metal layer being formed with a cross-shaped slot that corresponds in position to the resonant cavity; a second insulating substrate disposed on the second metal layer; and four radiation patch units disposed on the second insulating substrate, and corresponding in position to four regions that are on the second metal layer and that are spaced apart by the cross-shaped slot.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: October 12, 2021
    Assignee: National Chiao Tung University
    Inventors: Jenn-Hwan Tarng, Chih-Wei Chiu, Nai-Chen Liu
  • Patent number: 10916860
    Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: February 9, 2021
    Assignee: National Chaio Tung University Quanta Computer Inc.
    Inventors: Jenn-Hwan Tarng, Yu-Chen Lo, Sung-Jung Wu, Nai-Chen Liu
  • Publication number: 20200203848
    Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.
    Type: Application
    Filed: May 24, 2019
    Publication date: June 25, 2020
    Inventors: Jenn-Hwan TARNG, Yu-Chen LO, Sung-Jung WU, Nai-Chen LIU