{
  "patent_number": "US 11115136",
  "country": "US",
  "title": "How to Tune Multi-Antenna Systems for Better Wireless Signals",
  "original_title": "Method for calibrating an array antenna in a wireless communication system and apparatus thereof",
  "summary": "This patent describes a step-by-step method for fine-tuning the many small antennas in an array to make sure they work together perfectly, improving signal quality in wireless communication systems.",
  "what_it_does": "This patent outlines a method for calibrating an array antenna, which is a group of individual antennas working together. The process starts by transmitting a radio signal using two antennas from the array: a \"first antenna\" (which is already calibrated or a reference) and a \"second antenna\" (an adjacent one that needs calibration). A separate \"specific coupling antenna,\" located nearby, then measures this transmitted radio signal. Based on this measurement, the system calculates an \"error\" for the second antenna and then adjusts, or \"calibrates,\" it. This sequence of transmitting, measuring, estimating error, and calibrating is repeated until all antennas in the array have been fine-tuned. For example, in a 5G base station with many antennas, this method could calibrate one antenna, then use it as a reference to calibrate the next one in a row or column, and so on, ensuring each antenna contributes correctly to the overall signal.",
  "what_it_does_not_cover": [
    "Does not cover calibration methods that do not use a separate \"coupling antenna\" for measuring the radio signal.",
    "Does not cover calibration where antennas are not processed iteratively, one by one or in adjacent pairs, until all are calibrated.",
    "Does not cover systems that do not adjust at least one of the \"phase\" or \"gain\" of the radio signal during calibration.",
    "Does not cover calibration that is not performed by transmitting a signal through a \"first antenna\" and a \"second antenna\" simultaneously.",
    "Does not cover calibration methods that do not involve repeatedly transmitting a radio signal with a changing \"pre-configured adjustment value\" (claims 3-4)."
  ],
  "filed": "2020-07-10",
  "granted": "2021-09-07",
  "expires": "2040-07-10",
  "status": "active",
  "holder": "LG Electronics",
  "holder_url": "https://patentbrief.org/company/lg-electronics",
  "inventors": [
    {
      "name": "Dongho Cho",
      "url": "https://patentbrief.org/inventor/dongho-cho"
    },
    {
      "name": "Seongjae KIM",
      "url": "https://patentbrief.org/inventor/seongjae-kim"
    },
    {
      "name": "Dangoh Kim",
      "url": "https://patentbrief.org/inventor/dangoh-kim"
    },
    {
      "name": "Sangrim LEE",
      "url": "https://patentbrief.org/inventor/sangrim-lee"
    },
    {
      "name": "Juyong Lee",
      "url": "https://patentbrief.org/inventor/juyong-lee"
    },
    {
      "name": "Jaehoon Chung",
      "url": "https://patentbrief.org/inventor/jaehoon-chung"
    },
    {
      "name": "Sangmi NOH",
      "url": "https://patentbrief.org/inventor/sangmi-noh"
    },
    {
      "name": "Seungwon Keum",
      "url": "https://patentbrief.org/inventor/seungwon-keum"
    }
  ],
  "times_cited": 14,
  "tags": [
    "telecommunications",
    "consumer_electronics",
    "semiconductors"
  ],
  "abstract": "A method of calibrating an array antenna in a wireless communication system includes a first step of transmitting a radio signal through a first antenna and a second antenna determined among a plurality of antennas included in the array antenna, a second step of measuring the radio signal through a specific coupling antenna of a plurality of coupling antennas adjacent to the plurality of antennas, a third step of estimating an error of the second antenna based on a result of the measurement of the radio signal, and a fourth step of calibrating the second antenna based on the error.",
  "url": "https://patentbrief.org/patent/us/11115136/method-for-calibrating-an-array-antenna-in-a-wireless-communication-system-and-a",
  "markdown_url": "https://patentbrief.org/patent/us/11115136/method-for-calibrating-an-array-antenna-in-a-wireless-communication-system-and-a/md",
  "google_patents_url": "https://patents.google.com/patent/US11115136",
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