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FreshPatents.com Range extension and multiple access in modulated backscatter systems
One or more readers transmit radio frequency (RF) beacons to be electronically reflected by tags. Data transmitted via modulated backscatter from radio frequency identification (RFID) tags is encoded so as to permit reliable demodulation of simultaneous transmissions from multiple tags. This includes the use of spreading sequences as in direct...

FreshPatents.com Battery assisted rfid command set and interference control
Specialized battery assisted command set design methods are disclosed that provide for interference rejection using highly sensitive but relatively broadband RFID tags. The command set design also supports RFID system RF power control for further interference control. The command set design also allows for convenient expansion to active transmitters and...

FreshPatents.com Enhanced rfid output control
A method, system, and an apparatus are provided for enhanced RFID system output control. A carrier field of an RFID reader is switched on in a controlled manner. A response signal from a passive RFID transponder located in the carrier field is received at the RFID reader. The response signal...

FreshPatents.com Battery assisted tag and rfid system
Embodiments of the present invention provide for RFID systems that employ a plurality of battery assisted semi-passive and semi-active RFID tags with optimized system operation. The RFID tags feature receivers operating with multiple dynamic range states with square law mode for improved sensitivity, and part time active transmit in the...

FreshPatents.com Method and system for controlling read range of a portable rfid reader
A method and system for controlling the read range of a portable RFID reader is provided. The system includes a trigger system including a mechanical actuator manually positionable by a user and a sensor for sensing the position of the actuator. The read range of the RFID reader is changed...

FreshPatents.com Rfid tag with a semi-enclosed coupler
A RFID tag with a semi-enclosed coupler, wherein the coupler of the antenna layer is designed to be a semi-enclosed linear structure, and the open end of the coupler is connected to the antenna portion. One end of the antenna portion is inserted into the range of the coupler and...

FreshPatents.com Rfid enhanced operating system (eos) framework
A radio frequency identification (“RFID”) reader includes a hardware platform having a transceiver, an input/output interface, a controller, and a memory. The transceiver receives communication signals from at least one RFID tag. The controller is communicatively coupled to the transceiver and the input/output interface and controls the operation of the...

FreshPatents.com Rfid device and methods for controlling power supply according to connection with host and operation mode
A radio frequency identification (RFID) device and method for controlling power supply are provided. The RFID device controls power supply to its elements based on its connection with a host and its operation mode, thereby reducing power consumption....

FreshPatents.com Miniature hermetically sealed rfid microelectronic chip connected to a biocompatible rfid antenna for use in conjunction with an aimd
A non-hermetically sealed and biocompatible multi-turn RFID loop antenna is electrically connected to a RFID chip which is enclosed within its own hermetically sealed miniature container. The hermetic seal can be very small and the loop antenna can be relatively large, wherein the entire package is both highly reliable, resistant...

FreshPatents.com Radio frequency identification (rfid) reader with multiple receive channels
A radio-frequency identification (RFID) system includes an RFID tag, an RFID reader, and a controller. The RFID reader employs a plurality of phase-offset or phase-diverse channels to improve detection of data transmitted from the RFID tag to the RFID reader. A controller selects the channel that provides the best signal-to-noise...

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