{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10498174","patent":{"patent_number":"US-10498174","title":"Exciting large waveguide modes using supergain antennas","assignee":null,"inventors":[],"filing_date":"2017-12-11T00:00:00.000Z","publication_date":"2019-12-03T00:00:00.000Z","cpc_codes":["H02J","H04B"],"num_claims":20,"abstract":"Systems and methods for efficient coupling to low-loss eigenmodes of a spherical waveguide bounded by the Earth's surface and its ionosphere are disclosed. One or more eigenmodes of the Earth-ionosphere waveguide may be computed based on a mathematical model incorporating electrical properties of the terrestrial surface and plasma physics of the ionospheric layer. An array of electrically-connected waveguide-coupling elements may be configured for coupling to the one or more eigenmodes. By adjusting relative phases and/or amplitudes of the waveguide-coupler elements, as well as frequencies, the electrical size of the array may be made much larger than its physical size, and substantial electromagnetic energy may be targeted to preferentially excite the one or more eigenmodes. The adjustments may also account or compensate for non-homogeneous propagation properties of the ionosphere, and help reduce ohmic losses in the ionosphere."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Exciting large waveguide modes using supergain antennas","description":"Systems and methods for efficient coupling to low-loss eigenmodes of a spherical waveguide bounded by the Earth's surface and its ionosphere are disclosed. One or more eigenmodes of the Earth-ionosphe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10498174","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-10498174","citation_suggestion":"Patentable. \"Exciting large waveguide modes using supergain antennas\" (US-10498174). https://patentable.app/patents/US-10498174","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10498174","json":"https://patentable.app/api/llm-context/US-10498174","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T07:41:58.542Z"}