Patent
Full duplex modulated backscatter system
John Austin Maclellan,R. Anthony Shober,Giovanni Vannucci,Gregory Alan Wright +3 more
- 27 May 1996
295
TL;DR: In this article, a duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal, and a Backscatter Modulator uses a second information signal to modulate the reflection of the first modulating signal from the Antenna, the reflected signal being a second modulated message.
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Abstract: A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of the system. The remote Tag receives and processes the first modulated signal received at its Antenna. A Backscatter Modulator uses a second information signal to modulate the reflection of the first modulated signal from the Antenna, the reflected signal being a second modulated signal. The Interrogator receives and demodulates the second modulated signal to obtain the second information signal.
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Citations
Patent
Radio frequency data communications device
James E. O'Toole,John R. Tuttle,Mark E. Tuttle,Tyler A. Lowrey,Kevin M. Devereaux,George E. Pax,Brian P. Higgins,David K. Ovard,Shu-Sun Yu,Robert R. Rotzoll +9 more
- 28 Sep 1998
TL;DR: A radio frequency identification device comprises an integrated circuit including a receiver, a transmitter, and a microprocessor as discussed by the authors, where the receiver and transmitter together define an active transponder.
720
Patent
RFID system in communication with vehicle on-board computer
John R. Tuttle
- 05 Dec 1997
TL;DR: In this paper, a system comprising a vehicle on-board computer and a wireless transponder device coupled to the vehicle onboard computer is described, which performs a variety of functions because of its ability to transmit and receive data from other transponders.
502
Patent
Method of manufacturing an enclosed transceiver
Mark E. Tuttle,John R. Tuttle,Rickie C. Lake +2 more
- 09 Jan 1997
TL;DR: In this paper, a method of manufacturing an enclosed transceiver, such as a radio frequency identification (RFID) tag, is presented, where the tag comprises an integrated circuit (IC) chip, and an RF antenna mounted on a thin film substrate powered by a thin-film battery.
454
Patent
Method and system for communicating with and tracking RFID transponders
John T. Armstrong,John D. Richert,John P Palmer +2 more
- 15 Oct 2001
TL;DR: In this paper, an RFID system and method for communicating between a host computer, one or more interrogators connected to the host computer and a large body of transponders distributed within an area covered by the interrogators is presented.
410
Patent
System and method for locating individuals and equipment, airline reservation system, communication system
John R. Tuttle
- 10 Feb 1998
TL;DR: In this paper, a system for locating an individual in a facility, the system comprising a portable wireless transponder device borne by the individual; an interrogator; and a plurality of antennas distributed in the facility was described.
353
References
Patent
Interrogation, and detection system
Howard A. Baldwin,Steven W. Depp,Alfred R. Koelle,Robert W. Freyman +3 more
- 24 May 1976
TL;DR: In this article, the specification relates to a telemetering apparatus comprising a generator which generates at least a single frequency rf signal, a transponder for receiving that signal and for amplitude modulating it in accordance with information selected for transmission, an antenna on the transponders for reflecting the amplitude modulated signal, and a receiver which is preferably located at the generator.
419
Patent
Dual mode electronic identification system
Leonard C. Vercellotti,Alan F. Mandel,Richard J. Ravas,John C. Schlotterer,James A. Neuner +4 more
- 06 Nov 1991
TL;DR: In this paper, a dual-mode electronic identification system using a tag which has a RF receiver and transmitter contained therein is described, where the tag periodically transmits an identification beacon signal to a directional sensing antenna which uses the signal to compute the position of the tag.
244
Patent
Transponding tag and method
Robert Henry Bickley,Theodore Woolley Keller,John E. Bjornholt +2 more
- 12 Oct 1993
TL;DR: A transponding tag with two antennae formed on opposing sides of a dielectric planar substrate is shown in this article, where an electrical circuit, decoupling capacitor and inductive pickup coil are embedded within the substrate.
221
Patent
Programmable object identification transponder system
Eric Malmberg,Hien Tran,Zbigniew Siemiatkowski +2 more
- 11 Dec 1991
TL;DR: In this paper, the transponder responds to different RF signal strengths and commands from the transceiver to select whether it will store or transmit data, which is exchanged between the two devices using Manchester encoding.
102
Patent
Multichannel homodyne receiver
Jeremy A. Landt
- 19 Jan 1981
TL;DR: In this paper, a homodyne radar transmitter/receiver device which produces a single combined output which contains modulated backscatter information for all phase conditions of both modulated and unmodulated signals was proposed.
70
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