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8174363 |
Multi-transceiver RFID reader system with centralized control and frequency source
Embodiments of the present invention provide RFID systems having a centralized frequency source and controller. The centralized frequency source generates a reference signal, having a frequency...
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8131239 |
Method and apparatus for remote detection of radio-frequency devices
Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is...
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8098190 |
Apparatus and method for testing emergency locator beacons
An emergency locator beacon testing and communication system is described. The system uses privately-owned Local User Terminals which provide direct feeds to a privately-operated beacon information...
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8049625 |
High-performance mobile power antennas
An RFID tag's mobility can be increased and cost can be decreased by using high-performance mobile power antennas instead of battery powered tags. Disclosed are some power antennas that include a...
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8049624 |
Wireless communication method
To provide a wireless communication method in the case where communication of a wireless signal from a communication device to a semiconductor device can be ensured, communication of a wireless...
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8044824 |
Electronic barrier and enforcement system and method
Disclosed are systems and methods for implementing an electronic tollway barrier system. Exemplary systems and methods use positive vehicle identification at progressive monitoring locations to...
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8018340 |
System and method to track articles at a point of origin and at a point of destination using RFID
A system is provided, which may alternatively be implemented as a method. According to one embodiment, the system comprises an article to be tracked; a flexible radio frequency identification...
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7994918 |
Method and system for monitoring one or more objects by electronic device
A method and system for monitoring one or more objects by an electronic device are provided. The method includes defining a distance threshold between the electronic device and an object having a...
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7961077 |
Authenticity determination system of responder, identification system, and interrogation unit
A responder authenticity determination system, comprising: a responder that sends a response signal in response to a received signal; an interrogation signal generator that generates an...
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7952512 |
Mobile device enabled radar tags
A method is provided for mobile device enabled radar tags. A signal is transmitted to a radar tag. The radar tag detects the signal. The radar tag provides information. The information is received...
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7920071 |
Augmented reality-based system and method providing status and control of unmanned vehicles
An augmented reality system identifies and controls a vehicle located within an environment. A tracking system obtains viewpoint information corresponding to a real-time view of the environment. A...
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7917088 |
Adaptable detection threshold for RFID tags and chips
RFID tags, tag circuits, and methods are provided that reduce at least in part the distortion to received wireless signals, which is caused by interference in the environment. Two or more...
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7884753 |
Apparatus and method for ranging of a wireless transceiver with a switching antenna
A sensor includes a transceiver configured to receive a wireless signal from an interrogator and to reflect the wireless signal back. The sensor also includes an antenna-switching modulator...
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7859387 |
Backscatter transponder
A backscatter transponder for an HF communication system with modulated reradiation, is provided that includes an antenna for receiving high-frequency carrier signals, wherein the antenna has...
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7847722 |
Secondary surveillance radar and method of analyzing replies for secondary surveillance radar
Provided is a secondary surveillance radar with an improved capability of eliminating an unnecessary Mode A/C target report, which includes a transmission unit transmitting interrogations, a...
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7825802 |
Identification system and method of determining motion information
An identification system which may be employed in a transport or monitoring system has at least one stationary and at least one mobile transmission unit which are each provided with an antenna,...
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7786922 |
Systems and methods employing active TCAS to enhance situational awareness
A method according to the present invention includes transmitting a Mode S interrogation and receiving a response from an aircraft that has received the Mode S interrogation. A range to the...
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7746230 |
Radio frequency identification device and method
The present invention teaches a method of manufacturing an enclosed transceiver, such as a radio frequency identification (“RFID”) tag. Structurally, in one embodiment, the tag comprises an int...
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7667618 |
System and method for tracking and billing vehicle users based on when and in which road lanes their vehicles have been driven
A system includes one or more transponders, a number of sensors, a tracking sub-system, and a billing sub-system. Each transponder is located in a vehicle capable of being driven on a road having...
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7646330 |
System and method for locating objects and communicating with the same
Communication between a remote locator and a transponder is used to determine the relative position of the transponder. The transponder and locator each include a transmitter and a receiver. The...
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7602274 |
Dynamic configuration of a radio frequency transponder
A multi-channel remote keyless entry (RKE) transponder having dynamically re-configurable input channel selection, channel disable, settable sensitivity for each channel, wake-up filter timing...
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7583937 |
Digital interface and related event manager for integrated circuits
In one embodiment, the present invention includes a method for receiving at a transceiver from a baseband processor digital control information that includes both event and schedule information,...
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7536169 |
Method of and apparatus for utilizing geographically spread cellular radio networks to supplement more geographically limited stolen vehicle recovery radio networks in activation of radio tracking and recovery of such vehicles
Extending the activation and tracking capability of stolen vehicle recovery dedicated radio-frequency networks by the supplementary use of widely geographically provided cellular...
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7501978 |
Short-distance ranging system
A system for ascertaining the range from an interrogator to one or more transponders comprises an interrogator that transmits an RF carrier that is received by each transponder, the energy in the...
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7489240 |
System and method for 3-D position determination using RFID
Determining the location of wireless devices is improved by storing location information in RFID devices. As RFID devices come within range of each other they examine a confidence level associated...
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7479884 |
System and method for monitoring objects, people, animals or places
An improved system and method for monitoring objects, people, animals, or places uses a passive Modulating Reflector (MR) tag where an antenna is alternately short and open circuited according to a...
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7447480 |
Wireless, especially mobile, communication device for communicating with communication devices in vehicles
A wireless, in particular mobile, communication device (8) for communicating with communication units (9) in vehicles (5, 6, 7), comprising a transmitter (26) and a receiver (29) for...
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7414517 |
Radio frequency identification transponder
A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is...
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7405692 |
Detecting concealed objects at a checkpoint
Disclosed are systems, methods, devices, and apparatus to interrogate a clothed individual with electromagnetic radiation to determine if a concealed object is being carried. This determination...
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7362258 |
Transponder detection system using radio and light wave signals
A target object detection system for detecting a target object using a detector and a tag on the target object; the tag includes a radio wave receiver receiving radio wave from the detector; a...
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7324040 |
Method of automatically setting the gain of an interrogator receiver within a non-contacting identification system
An attack is activated in a receiver amplifier of an interrogator whenever an amplified input signal exceeds an attack threshold voltage value Vatt, and the receiver amplifier at least during a...
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7319368 |
Method and circuit arrangement for load modulation in a combination comprised of a transmitting and a receiving oscillator circuit
A method and circuit arrangement is provided for load modulation in a receiving oscillator circuit, which can be mutually coupled with a transmitting oscillator circuit, having at least one...
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7315274 |
Method and system for determining the position of marine vessels and similar objects
A method for determining the relative position between two or more objects in a marine environment, including waterways, of which at least one object can be maneuvered relative to one or more other...
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7295115 |
Radio-frequency identification (RFID) tag employing unique reception window and method therefor
A radio-frequency identification (RFID) tag employing a unique reception window and method for operating the tag system provides low-power operation for enhanced tag battery life, while providing...
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7277681 |
Interrogator of moving body identification device
To reduce the size, weight and cost of an interrogator which is included in an RFID system and required to have a high output power, the interrogator for transmitting a signal shares a radio wave...
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7245252 |
Method for determining the distance between two transmitting and receiving stations
In a method for determining the distance between two transmitting and receiving stations, a transmission signal is generated in each station and is transmitted as a series of microwave pulses...
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7245220 |
Radio frequency identification (RFID) controller
A radio frequency identification (RFID) controller within an RFID system includes an RFID interrogator interface configured to receive signals from an RFID interrogator. The RFID interrogator...
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7239264 |
Radar transponder
Transponders, receivers and position determining systems are described. In one embodiment, a transponder includes (i) an on-board receiver and associated receiving antenna for receiving incoming...
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7224291 |
Electronic vehicle toll collection system and method
A system for automatic collection of tolls includes an in-vehicle toll processor having memory for storing a toll-money-available quantity purchased by the user, and a toll-facility-identification...
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7221308 |
Joint stars embedded data link
A system comprises a radar for producing a radar interrogation signal, a transponder for receiving the radar interrogation signal and producing a transponder signal including a first linear...
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7209706 |
Communication apparatus and communication method
A communication apparatus and a communication method prevent responses from being simultaneously received from two or more communicating parties. A first NFC apparatus transmits data for requesting...
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7164380 |
Interrogator and goods management system adopting the same
An interrogator with an antenna that allows information exchanges with multiple transponders in a shorter distance of communication, by securing an intensified and uniform electromagnetic energy...
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7158031 |
Thin, flexible, RFID label and system for use
A radio frequency indentification (RFID) label includes an integrated circuit and an antenna. The label may also include two flexible films directly sealed to each other. The label may be affixed...
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7106245 |
Digital RF tag
An RF tag is provided to communicate with an interrogating source in which the tag has programmability and flexibility to uplink data to multiple platforms. As such the RF tag functions as a...
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7091860 |
Multi-frequency identification device
The present invention comprises a radio frequency identification device that utilizes multiple operating frequencies. In one embodiment of the present invention, one frequency (e.g., an ultra-high...
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7084768 |
Anti-collision interrogation pulse focusing system for use with multiple surface acoustic wave identification tags and method of operation thereof
The present invention provides a system for avoiding code collisions from multiple SAW identification tags and a method of operating such system. In one embodiment the invention provides for (1)...
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7046957 |
Reflecting modulator circuit comprising a negative impedance amplifier
A modulator circuit comprises a negative impedance amplifier which is operable such that a signal applied to the amplifier is reflected and amplified. Switching circuitry is provided for switching...
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7034741 |
Apparatus for detecting position information of a moving object
An apparatus for detecting position information of a moving object. The apparatus includes a transponder, a communication module, and a reader. The transponder is installed on a predetermined...
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7023342 |
Continuous wave (CW)—fixed multiple frequency triggered, radio frequency identification (RFID) tag and system and method employing same
A far field radio frequency identification (RFID) tagging and tracking system employing a plurality of continuous wave (CW), unmodulated signals selected from frequencies including a predetermined...
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6946952 |
Data carrier for transmitting data with different transmission parameters
A data carrier (1) for contactless communication with the communication station comprises firstly a reception stage (3) for receiving an interrogation signal (IS), secondly a generation stage (17)...
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