Long-range, full-duplex, modulated-reflector cell phone for voice/data transmission
January 12, 2021. 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 ReferencesInterrogation, and detection system Multichannel homodyne receiver Helical antenna for small portable wireless devices Full duplex modulated backscatter system Modulated backscatter microstrip patch antenna Modulated backscatter wireless communication system having an extended range Extremely high frequency multipoint fixed-access wireless communication system Antenna for a portable radio communication device Antenna system for an RF data communications device Flip open antenna for a communication device InventorsApplicationNo. 760193 filed on 01/12/2001US Classes:455/106, Modulation by absorption, shielding, or reflecting340/10.4, Response signal detail455/63.1, Distortion, noise, or other interference prevention, reduction, or compensation455/107With variation of antenna impedance or dimension for modulationExaminersPrimary: Maung, NayAssistant: Trinh, Sonny Attorney, Agent or FirmInternational ClassH03C 001/52AbstractA long-range communications apparatus utilizing modulated-reflector technology is described. The apparatus includes an energy-transmitting base station and remote units that do not emit radiation in order to communicate with the base station since modulated-reflector technology is used whereby information is attached to an RF carrier wave originating from the base station which is reflected by the remote unit back to the base station. Since the remote unit does not emit radiation, only a low-power power source is required for its operation. Information from the base station is transmitted to the remote unit using a transmitter and receiver, respectively. The range of such a communications system is determined by the properties of a modulated-reflector half-duplex link.Other References
Field of SearchSingle antenna switched between transmitter and receiverTRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) Modulation by absorption, shielding, or reflecting With variation of antenna impedance or dimension for modulation Frequency or phase modulation With coupled antenna Power conservation Microstrip Plural separate diverse type Plural diverse-type antennas using same active element With reflector Reflector and antenna relatively movable With reflector With reflector With means reducing re-radiation into active antenna Plural reflectors Plural reflectors Response signal detail Specified antenna structure COMMUNICATION OVER FREE SPACE | |
