Inductively coupled wireless system and method
April 2, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPreselector cavity arrangement and RF selectivity assembly Apparatus for wireless transmission of a teaching program in a classroom System transmitting and receiving digital and analog information for use in locating concealed conductors Combination head-protective helmet & communications system Wireless communications using near field coupling Very low power cordless headset system Integrated sound/telephone headset system Short-range magnetic communication system Small, battery operated RF transmitter for portable audio devices for use with headphones with RF receiver System for assigning multichannel audio signals to independent wireless audio output devices InventorsApplicationNo. 285511 filed on 04/02/1999US Classes:455/41.1, Near field (i.e., inductive or capacitive coupling)455/132, Plural receivers455/151.2Wireless link (sonic, RF, or infrared)ExaminersPrimary: Trost, WilliamAssistant: Nguyen, Simon Attorney, Agent or FirmInternational ClassH04B 005/00AbstractA short range inductively coupled wireless communication system employs analog frequency modulation of a high frequency carrier and magnetic coupling between a transmitting antenna and a receiving antenna. A transmitter coupled to the transmitting antenna modulates multiple high-fidelity analog audio signals and digital control messages onto separate high frequency ("HF") carriers. The electric field portion of the transmitted electromagnetic field is substantially eliminated during transmission, while the magnetic field portion is substantially unaffected. The receiving antenna is coupled to a demodulator which reproduces the audio frequency signals and decodes control messages sent by the transmitter. | |
