Patents by Inventor Lidong Chi

Lidong Chi 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: 20250102655
    Abstract: An antenna unit in the field of radar antenna technology research is disclosed. The antenna unit includes a PCB dielectric substrate, a metal ground, a feed structure, radiation walls and impedance adjustment structures. The metal ground is on the PCB dielectric substrate. The feed structure, the radiation walls and the impedance adjustment structures are on the metal ground; a plurality of metal via holes of the radiation walls surround the periphery of the feed structure, and a plurality of metal via holes of a radiation wall in an electric polarization direction are connected to each other by a metal sheet. Each impedance adjustment structure is between the feed structure and a radiation wall, and causes a parallel impedance of a radiation resistance and a conduction impedance of the antenna unit to be far less than a coupling impedance between the antenna unit and an external adjacent antenna.
    Type: Application
    Filed: March 17, 2022
    Publication date: March 27, 2025
    Inventors: Lidong CHI, Yunlong LUO, Yang YANG, Alex QI, Yihong QIAN
  • Patent number: 12230874
    Abstract: Disclosed is a substrate-integrated circularly polarized electromagnetic radiation structure. A plurality of connection points are provided between an upper metal radiation structure and a lower metal backplane; the upper metal radiation structure consists of a metal ring and two metal branches disposed within the metal ring; the metal branches are bent structures; the metal ring is a rectangular ring structure; the two metal branches are rotational symmetric by 180 degrees relative to a feeder center, and a serpentine structure composed of the two metal branches enables same to achieve circular polarization (comprising left-hand circular polarization and right-hand circular polarization) within broadband and to achieve beam directivity.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: February 18, 2025
    Assignee: PONTOSENSE INC.
    Inventors: Lidong Chi, Alex Qi, Yunlong Luo, Ge Shi, Yihong Qi, Ruini Xue, Ronghao Jin, Zhanghua Cai
  • Publication number: 20230411839
    Abstract: Disclosed is a substrate-integrated circularly polarized electromagnetic radiation structure. A plurality of connection points are provided between an upper metal radiation structure and a lower metal backplane; the upper metal radiation structure consists of a metal ring and two metal branches disposed within the metal ring; the metal branches are bent structures; the metal ring is a rectangular ring structure; the two metal branches are rotational symmetric by 180 degrees relative to a feeder center, and a serpentine structure composed of the two metal branches enables same to achieve circular polarization (comprising left-hand circular polarization and right-hand circular polarization) within broadband and to achieve beam directivity.
    Type: Application
    Filed: November 3, 2021
    Publication date: December 21, 2023
    Inventors: Lidong CHI, Alex Qi, Yunlong LUO, Ge SHI, Yihong QI, Ruini XUE, Ronghao JIN, Zhanghua CAI
  • Patent number: 7362267
    Abstract: A beam forming method for a smart antenna and smart antennas configured to employ the method, in which pre-multibeam processing and time delay aligning are implemented to array signals, and then a suboptimum weight is calculated by means of a pilot frequency symbol, and an optimum weight is iteratively calculated with the suboptimum weight as an initial value, and finally the beams are formed by means of the optimum weight.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: April 22, 2008
    Assignee: ZTE Corporation
    Inventors: Lidong Chi, Yanwen Wang, Yunkuan Wang
  • Publication number: 20060114154
    Abstract: The present invention discloses a beam forming method for a smart antenna and a beam forming apparatus for a smart antenna. Said method comprises: implementing pre-multibeam processing and time delay aligning to array signals; calculating a suboptimum weight by means of a pilot frequency symbol; iteratively calculating an optimum weight with said suboptimum weight as an initial value; forming beams by means of said optimum weight. To use the beam forming method and apparatus of the present invention, it can reduce the bit error ratio for receiving and outputting greatly and avoid the multiplication between large matrixes and matrix inversion and then replace them by simple addition and multiplication, so as to reduce the difficulty for hardware implement and make it easier to be performed.
    Type: Application
    Filed: December 31, 2002
    Publication date: June 1, 2006
    Inventors: Lidong Chi, Yanwen Wang, Yunkuan Wang