Patents by Inventor Namjo Ahn

Namjo Ahn 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).

  • Method and device for performing communication based on backscatter in wireless communication system
    Patent number: 12664383
    Abstract: A communication device includes an interrogator configured to output interrogation signals including consecutive unit chirp signals that change from a first frequency to a second frequency, and a backscatter tag configured to receive the interrogation signals and frequency-modulate the interrogation signals to generate and provide tag signals, wherein the interrogator is further configured to receive the tag signals and demodulate the tag signals.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: June 23, 2026
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Song Min Kim, Kangmin Bae, Namjo Ahn
  • NEXTG-RECONFIGURABLE LOW-POWER MMWAVE METASURFACE
    Publication number: 20260163249
    Abstract: Provided is a 5G mobile communication-based low-power millimeter wave (mmWave) metasurface. The low-power mmWave metasurface may include a plurality of unit cells that operate in the mmWave band, and each of the unit cells may include a substrate; a reflector on the substrate; and a phase shifter connected to the reflector on the substrate, and configured to shift a phase of a mmWave signal incident to the reflector, including a plurality of varactor diodes.
    Type: Application
    Filed: November 20, 2025
    Publication date: June 11, 2026
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Song Min KIM, Namjo AHN, MinSeok KIM
  • METHOD AND DEVICE FOR PERFORMING COMMUNICATION BASED ON BACKSCATTER IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20230177291
    Abstract: A communication device includes an interrogator configured to output interrogation signals including consecutive unit chirp signals that change from a first frequency to a second frequency, and a backscatter tag configured to receive the interrogation signals and frequency-modulate the interrogation signals to generate and provide tag signals, wherein the interrogator is further configured to receive the tag signals and demodulate the tag signals.
    Type: Application
    Filed: December 1, 2022
    Publication date: June 8, 2023
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Song Min KIM, Kangmin Bae, Namjo Ahn