{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9825611","patent":{"patent_number":"US-9825611","title":"Dual passband radio frequency filter and communications device","assignee":null,"inventors":[],"filing_date":"2017-04-12T00:00:00.000Z","publication_date":"2017-11-21T00:00:00.000Z","cpc_codes":["H04B","H04B"],"num_claims":7,"abstract":"Multi-band filters and communications devices are disclosed. A multi-band filter has a lower pass-band and an upper pass-band separated by an intervening stop-band. The multi-band filter includes a first ladder network and a second ladder network coupled in series. The first ladder network is configured to provide transmission zeros at frequencies below a lower edge of the lower pass-band and transmission zeros at frequencies above an upper edge of the upper pass-band. The second ladder network is configured to provide transmission zeros at frequencies within the intervening stop-band."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Dual passband radio frequency filter and communications device","description":"Multi-band filters and communications devices are disclosed. A multi-band filter has a lower pass-band and an upper pass-band separated by an intervening stop-band. The multi-band filter includes a fi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9825611","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-9825611","citation_suggestion":"Patentable. \"Dual passband radio frequency filter and communications device\" (US-9825611). https://patentable.app/patents/US-9825611","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9825611","json":"https://patentable.app/api/llm-context/US-9825611","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:10:51.723Z"}