{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11239707","patent":{"patent_number":"US-11239707","title":"Tunable resonant inductive coil systems for wireless power transfer and near field communications","assignee":null,"inventors":[],"filing_date":"2018-11-15T00:00:00.000Z","publication_date":"2022-02-01T00:00:00.000Z","cpc_codes":["H02J","H02J","H04B","H04B","H04B"],"num_claims":19,"abstract":"A tunable resonant inductive coil system includes an electrical circuit having an alternating current (AC) voltage source, a barium strontium titanate (BST) variable capacitor coupled in series with a first terminal of the AC voltage source, a coil coupled in series with the BST variable capacitor, and a return line coupling the coil with a second terminal of the AC voltage source and/or a ground. The electrical circuit forms an LC circuit (resonant circuit). The electrical circuit adjusts between two configurations. In the first configuration the resonant circuit has a first resonant frequency configured for wireless power transfer and in the second configuration it has a second resonant frequency configured for near field communication (NFC). An entire length of the coil is used for both resonant frequencies. Adjusting between the first and second configurations includes varying a capacitance of the BST variable capacitor in response to receiving a control signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Tunable resonant inductive coil systems for wireless power transfer and near field communications","description":"A tunable resonant inductive coil system includes an electrical circuit having an alternating current (AC) voltage source, a barium strontium titanate (BST) variable capacitor coupled in series with a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11239707","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-11239707","citation_suggestion":"Patentable. \"Tunable resonant inductive coil systems for wireless power transfer and near field communications\" (US-11239707). https://patentable.app/patents/US-11239707","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11239707","json":"https://patentable.app/api/llm-context/US-11239707","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:24:22.425Z"}