{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9665821","patent":{"patent_number":"US-9665821","title":"Long-range surface-insensitive passive RFID tag","assignee":null,"inventors":[],"filing_date":"2016-12-19T00:00:00.000Z","publication_date":"2017-05-30T00:00:00.000Z","cpc_codes":["G06K","G06K","G06K"],"num_claims":30,"abstract":"A passive RFID tag that provides long-range reception, even when mounted on a conductive material or a human body. The antenna of the RFID tag is a loop antenna perpendicular to the mounting surface; it may be formed from a tubular sheet of conductive material to reduce conductive losses. An illustrative rectangular loop 1 inch wide by 0.15 inches high by 0.625 inches deep provides a high effective antenna aperture in a compact RFID tag. Multiple mounting positions may be provided for an RFID chip and for a resonating capacitor. Selection of different mounting positions for these components may allow tuning of impedance and resonant frequency without changing components, providing for simpler and more cost-effective manufacturing. The loop antenna may be formed for example from a stamped metal part with a hollow air core, from a double-sided thick PCB, or from an overlay of conductive ink onto a flexible material."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Long-range surface-insensitive passive RFID tag","description":"A passive RFID tag that provides long-range reception, even when mounted on a conductive material or a human body. The antenna of the RFID tag is a loop antenna perpendicular to the mounting surface; ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9665821","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-9665821","citation_suggestion":"Patentable. \"Long-range surface-insensitive passive RFID tag\" (US-9665821). https://patentable.app/patents/US-9665821","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9665821","json":"https://patentable.app/api/llm-context/US-9665821","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:44:50.958Z"}