{
  "patent_number": "US 6552634",
  "country": "US",
  "title": "Designing Electronic Networks for Efficient Power Amplification",
  "original_title": "Wideband, minimum-rating filters and multicouplers for power amplifiers",
  "summary": "This patent describes how to design electronic networks that allow power amplifiers to work efficiently over a wide range of frequencies without overheating or failing.",
  "what_it_does": "This patent details a method and circuit design for power amplification systems. The core idea is to select the components of an electronic network (like filters or matching networks) so that the input side of the network has a 'minimum-rating characteristic.' This means the network is designed to handle the input voltage and current without exceeding specific limits, even when delivering a set amount of signal power to a load across a range of frequencies. It also covers systems where multiple amplifiers, each optimized for different frequency bands, combine their outputs into a single load, presenting a stable, resistive load to each amplifier and avoiding power loss in the combining network. An example would be a radio transmitter needing to operate across many channels; this patent's method helps ensure the power amplifiers don't get overloaded.",
  "what_it_does_not_cover": [
    "Electronic networks that are not designed to minimize input voltage and current ratings.",
    "Systems that do not deliver a specified amount of signal power to a load.",
    "Methods that do not operate across a specified frequency band.",
    "Amplification systems that do not use an electronic network between the amplifier and the load.",
    "Combining networks where the passbands of individual networks significantly overlap and load each other."
  ],
  "filed": "2000-10-02",
  "granted": "2003-04-22",
  "expires": "2020-10-02",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Frederick Herbert Raab",
      "url": "https://patentbrief.org/inventor/frederick-herbert-raab"
    }
  ],
  "times_cited": 57,
  "tags": [
    "telecommunications",
    "consumer_electronics",
    "semiconductors"
  ],
  "abstract": "A method and a circuit for power amplification over a wide frequency range based upon the use of minimum-rating filters or matching networks, negative-component signal processing, and single or multiple amplifiers. The filters and matching networks are preferably designed to minimize the required ratings of the amplifier(s) driving them. The signal processor or generator preferably uses negative components to produces a driving signal that is compensated for the ripple in the filter, matching network, and load. The outputs of multiple amplifiers optimized for different frequency ranges can be combined into a single load with flat frequency response, resistive loads presented to the amplifiers, and no inherent power loss in the combining network.",
  "url": "https://patentbrief.org/patent/us/6552634/wideband-minimum-rating-filters-and-multicouplers-for-power-amplifiers",
  "markdown_url": "https://patentbrief.org/patent/us/6552634/wideband-minimum-rating-filters-and-multicouplers-for-power-amplifiers/md",
  "google_patents_url": "https://patents.google.com/patent/US6552634",
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}