{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9652645","patent":{"patent_number":"US-9652645","title":"Systems and methods to selectively connect antennas to receive and backscatter radio frequency signals","assignee":null,"inventors":[],"filing_date":"2015-02-10T00:00:00.000Z","publication_date":"2017-05-16T00:00:00.000Z","cpc_codes":["G06K","G06K","G06K","G06K","G06K"],"num_claims":14,"abstract":"Systems and methods to selectively attach and control antennas via diodes. In one embodiment, a system includes: a reader having a plurality of reader antennas of different polarizations to transmit radio frequency signals; and at least one radio frequency device. The radio frequency device includes: a plurality of tag antennas of different polarizations; a plurality of diodes coupled to the plurality of tag antennas respectively; a receiver coupled to the plurality of diodes to receive the radio frequency signals from the tag antennas when the diodes are forward biased; and a set of one or more current controllers coupled to the plurality of diodes. In a receiving mode the controllers selectively forward bias the diodes to receive the signals from the reader. In a transmitting mode the controllers selectively change the state of the tag antennas to transmit data via backscattering the radio frequency signals."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Systems and methods to selectively connect antennas to receive and backscatter radio frequency signals","description":"Systems and methods to selectively attach and control antennas via diodes. In one embodiment, a system includes: a reader having a plurality of reader antennas of different polarizations to transmit r","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9652645","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-9652645","citation_suggestion":"Patentable. \"Systems and methods to selectively connect antennas to receive and backscatter radio frequency signals\" (US-9652645). https://patentable.app/patents/US-9652645","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9652645","json":"https://patentable.app/api/llm-context/US-9652645","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:20:49.314Z"}