{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11280746","patent":{"patent_number":"US-11280746","title":"Background suppression for doppler-free mm-wave spectroscopy","assignee":null,"inventors":[],"filing_date":"2019-12-30T00:00:00.000Z","publication_date":"2022-03-22T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N","G01N","G01N","A61B","A61B"],"num_claims":20,"abstract":"A system includes first and second gas cells each comprising a respective sealed interior waveguide; first transmit antenna coupled to the first gas cell to provide a first electromagnetic wave to the first gas cell along a first direction; second transmit antenna coupled to the first gas cell to provide a second electromagnetic wave to the first gas cell along a second direction opposite the first direction; third transmit antenna coupled to the second gas cell to provide a third electromagnetic wave to the second gas cell; first receive antenna coupled to the first gas cell to generate a first signal indicative of an amount of energy in first electromagnetic wave; second receive antenna coupled to the second gas cell to generate a second signal indicative of an amount of energy in second electromagnetic wave; and processor to calculate a background-free signal based on a difference between first and second signals."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Background suppression for doppler-free mm-wave spectroscopy","description":"A system includes first and second gas cells each comprising a respective sealed interior waveguide; first transmit antenna coupled to the first gas cell to provide a first electromagnetic wave to the","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11280746","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-11280746","citation_suggestion":"Patentable. \"Background suppression for doppler-free mm-wave spectroscopy\" (US-11280746). https://patentable.app/patents/US-11280746","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11280746","json":"https://patentable.app/api/llm-context/US-11280746","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:56:39.532Z"}