Patents by Inventor Yujian LI

Yujian LI 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: 20250001153
    Abstract: Disclosed in the present disclosure is a method for preparing an electro-responsive silk fibroin material, which method comprises the following steps: (1) activation of silk fibroin, which involves: diluting an aqueous solution of silk fibroin, then stabilizing the temperature to 0° C.-4° C., adjusting a pH value to 5-6, adding 1-10 wt % of N-hydroxysuccinimide relative to the mass of silk fibroin, then adding 2-20 wt % of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride relative to the mass of silk fibroin, mixing the resulting mixture uniformly, and performing a reaction to obtain an activated silk fibroin solution; (2) thiolation of silk fibroin, which involves: adding a cysteamine hydrochloride solution dropwise to the activated silk fibroin solution, adjusting the pH value of the final solution to 5-6, performing a reaction under stirring at 0° C.-4° C., taking out the resulting product, and then leaving the resulting product to stand for a reacting at 2° C.-8° C.
    Type: Application
    Filed: September 16, 2024
    Publication date: January 2, 2025
    Inventors: Shenzhou Lu, Zhenzhen Qi, Xiaosheng Tao, Shijie Guo, Zheng Yan, Yujian Li
  • Publication number: 20240088571
    Abstract: Embodiments of the present disclosure provide an array antenna bandwidth enhancement method based on phase regulation and control, an apparatus and an array antenna, a reflection coefficient of the array is calculated utilizing a one-time-reflection model calculation formula determined based on a small reflection theory, thus saving a full-wave simulation time of a large-scale array, and greatly improving a design efficiency. Enhancement of a bandwidth of the array using the array bandwidth enhancement method based on phase regulation and control may save a time for stepwise increased and matching adjustment of the large-scale array, and reduce design complexity. The provided method is simple and efficient, and is beneficial to realization of a wideband design of the large-scale array antenna.
    Type: Application
    Filed: June 20, 2023
    Publication date: March 14, 2024
    Inventors: Yujian Li, Xiaojuan Wang, Fanqi Sun, Junhong Wang
  • Publication number: 20240045999
    Abstract: The present disclosure provides a method and apparatus for determining an antenna array and an electronic device; the method includes: determining a first target reflection coefficient of each radiation element forming the antenna array based on a pre-acquired antenna array design index; determining a model structure of each radiation element based on the first target reflection coefficient; extracting an amplitude and a phase of a first reflection coefficient from a simulation result of the model structure of a specified radiation element; determining a second target reflection coefficient of each power divider forming the antenna array in a preset calculation mode; determining a model structure of each power divider based on the second target reflection coefficient; and determining the antenna array based on each radiation element with the determined structure and each power divider with the determined structure.
    Type: Application
    Filed: June 20, 2023
    Publication date: February 8, 2024
    Inventors: Yujian Li, Fanqi Sun, Junhong Wang, Xiaojuan Wang
  • Patent number: 9960493
    Abstract: A patch antenna is presented herein. The patch antenna can include a substrate layer, a dielectric layer and a conductive layer. The substrate layer can include a hollow thermoplastic structure. The dielectric layer can be attached to a surface of the substrate layer. Furthermore, the dielectric layer can include a thermoplastic structure filled with a fluid. The conductive layer can be associated with another surface of the substrate layer.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 1, 2018
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Kwai-Man Luk, Yujian Li
  • Patent number: 9954288
    Abstract: A complementary antenna (e.g., wideband complementary antenna) is presented herein. A complementary antenna can include a first dipole portion, a second dipole portion, a first electrically conductive surface, and a second electrically conductive surface. The first dipole portion can include a first patch antenna portion and a second patch antenna portion. The second dipole portion can include a third patch antenna portion and a fourth patch antenna portion electrically coupled to the second patch antenna portion via a strip antenna portion. The first electrically conductive surface can be coupled to the first dipole portion and the second dipole portion via a first set of electrically conductive pins. The second electrically conductive surface can be coupled to the first electrically conductive surface via a second set of electrically conductive pins.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: April 24, 2018
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Kwai-Man Luk, Yujian Li
  • Publication number: 20170250473
    Abstract: A complementary antenna (e.g., wideband complementary antenna) is presented herein. A complementary antenna can include a first dipole portion, a second dipole portion, a first electrically conductive surface, and a second electrically conductive surface. The first dipole portion can include a first patch antenna portion and a second patch antenna portion. The second dipole portion can include a third patch antenna portion and a fourth patch antenna portion electrically coupled to the second patch antenna portion via a strip antenna portion. The first electrically conductive surface can be coupled to the first dipole portion and the second dipole portion via a first set of electrically conductive pins. The second electrically conductive surface can be coupled to the first electrically conductive surface via a second set of electrically conductive pins.
    Type: Application
    Filed: May 15, 2017
    Publication date: August 31, 2017
    Inventors: Kwai-Man LUK, Yujian LI
  • Patent number: 9653810
    Abstract: A complementary antenna (e.g., wideband complementary antenna) is presented herein. A complementary antenna can include a first dipole portion, a second dipole portion, a first electrically conductive surface, and a second electrically conductive surface. The first dipole portion can include a first patch antenna portion and a second patch antenna portion. The second dipole portion can include a third patch antenna portion and a fourth patch antenna portion electrically coupled to the second patch antenna portion via a strip antenna portion. The first electrically conductive surface can be coupled to the first dipole portion and the second dipole portion via a first set of electrically conductive pins. The second electrically conductive surface can be coupled to the first electrically conductive surface via a second set of electrically conductive pins.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: May 16, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Kwai-Man Luk, Yujian Li
  • Publication number: 20170025760
    Abstract: A patch antenna is presented herein. The patch antenna can include a substrate layer, a dielectric layer and a conductive layer. The substrate layer can include a hollow thermoplastic structure. The dielectric layer can be attached to a surface of the substrate layer. Furthermore, the dielectric layer can include a thermoplastic structure filled with a fluid. The conductive layer can be associated with another surface of the substrate layer.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Kwai-Man LUK, Yujian LI
  • Publication number: 20160365638
    Abstract: A complementary antenna (e.g., wideband complementary antenna) is presented herein. A complementary antenna can include a first dipole portion, a second dipole portion, a first electrically conductive surface, and a second electrically conductive surface. The first dipole portion can include a first patch antenna portion and a second patch antenna portion. The second dipole portion can include a third patch antenna portion and a fourth patch antenna portion electrically coupled to the second patch antenna portion via a strip antenna portion. The first electrically conductive surface can be coupled to the first dipole portion and the second dipole portion via a first set of electrically conductive pins. The second electrically conductive surface can be coupled to the first electrically conductive surface via a second set of electrically conductive pins.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 15, 2016
    Inventors: Kwai-Man LUK, Yujian LI