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7612708 |
RF system for tracking objects
A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder...
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7609197 |
Method for measuring distance and position using spread spectrum signal, and an equipment using the method
By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation 105, the first threshold value...
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7598905 |
Systems and methods for monitoring transponder performance
There are presented various approaches to monitor performance of RF systems and circuitry such as those used in aircraft transponders. Such monitoring may be designed to verify operational...
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7573418 |
Tag communication apparatus, control method for tag communication apparatus, computer readable medium for tag communication control and tag communication control system
A direction estimating section estimates the incoming direction of a radio wave from an RFID tag in each of antennas. A position calculating section calculates the position of the RFID tag on the...
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7573369 |
System and method for interrogating and locating a transponder relative to a zone-of-interest
A directional warning system and a method of warning of friendly forces. In one embodiment, the system includes: (1) a conductive shield having an opening at an end thereof and a radio frequency...
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7535360 |
Homodyne RFID receiver and method
An RFID circuit comprises an RF carrier signal source, a hybrid coupled to the RF carrier signal source operable to generate an in-phase and a quadrature phase component of the RF carrier signal, a...
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7522878 |
Adaptive inductive power supply with communication
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
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7519332 |
Radio-frequency radiocommunication apparatus
A radiocommunication apparatus includes a transmitting device and a receiving device. The transmitting device includes a first local oscillation section for selecting a frequency for a first local...
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7515097 |
Pulse transmitters having multiple outputs in phase relationship and methods of operation
A transmitter provides a plurality of output signals. The transmitter includes a processor, a modulator, a first circuit, and a second circuit. The modulator provides a modulated signal responsive...
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7509217 |
Vehicle detector and vehicle detecting method
A vehicle detector includes a detecting apparatus and a determining apparatus. If a plurality of detection points detected by the detecting apparatus forms a group of detection points, the...
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7504992 |
Wireless system using continuous wave phase measurement for high-precision distance measurement
A system and method for monitoring topological changes in a defined area. A grid of sensors is arranged in the area, with known distances between them. The sensors communicate wirelessly with a...
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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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7492280 |
Wireless remote control systems
Wireless remote control system for engine piston with in-piston circuit ( 50 ) and an external processing unit mounted on the exterior of the crank case ( 51 ). A carrier signal generated 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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7486226 |
Device and a method for accurate radar level gauging
The invention relates to a system, device, and method for using radar signals to measure the distance (h) to a surface from said device, the device comprising a transmitter and a transmitting...
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7486189 |
RFID systems and methods employing infrared localization
A series of radio frequency identification (RFID) systems are delineated. One such RFID system comprises an RFID signpost, and a plurality of infrared transmitters, wherein each infrared...
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7479919 |
Surface vehicle transponder
Systems and methods for alerting surrounding aircraft if a ground-based unit is a threat. One example system is located on a ground-based unit. The system includes a position sensor that senses...
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7474211 |
System and method for killing a RFID tag
System and method for disabling a RFID tag. A preferred embodiment comprises attenuating a signal received at an antenna of the RFID tag based upon a status of the RFID tag and responding to an...
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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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7436350 |
Combined aircraft TCAS/transponder with common antenna system
The present invention is a combined aircraft TCAS/Transponder with common antenna system and transmitter. Common TCAS/Transponder multi-monopole top and bottom antennas may be connected to a top...
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7414567 |
ADS-B radar system
A system and method of using a standard ADS-B transmitter and encoder to identify targets to provide a collision avoidance system, wherein the method includes the steps of providing a standard...
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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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7408497 |
Method and device for determining a reference value of a response, in particular of a mode S response received by a secondary radar
The present invention applies to the surveillance of, in particular civil, air traffic, and more particularly, to cooperative aircraft ground systems which make it possible to pinpoint in radial...
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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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7391359 |
Mode S transponder transmission signal decoder and Mode S transponder transmission signal decoding method
There are provided a differential processing unit which performs differential processing for a Mode S transponder transmission signal, an auto correlation arithmetic operation unit which performs...
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7372398 |
Electronic target position control at millimeter wave for hardware-in-the-loop applications
An apparatus for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes a pair of horns and a conditioning circuit. The conditioning circuit is...
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7369941 |
Collision detection system and method of estimating target crossing location
A collision detection system and method of estimating a crossing location are provided. The system includes a first sensor for sensing an object in a field of view and sensing a first range defined...
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7342500 |
Compact microstrip transponder antenna
A transponder formed on a circuit substrate having a longitudinal axis and a transverse axis. An antenna is disposed on one side of a transverse axis, extending in a longitudinal direction, and the...
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7342481 |
Method and circuit arrangement for wireless data transmission
A method and circuit for wireless data transmission between a base station and one or more transponders is provided in which the base station modulates a carrier signal with a modulation signal and...
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7333017 |
Wireless tag reader and writer
A read and write box of a wireless tag reader and writer according to and embodiment of the invention has an open end and a closed end. Multiple envelopes each having a wireless tag at the end are...
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7327306 |
RF system for tracking objects
A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder...
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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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7323977 |
Tunable RFID tag for global applications
An RF transponder comprises a transponder integrated circuit, an antenna connected to the transponder integrated circuit, and at least one parasitic element adapted to interact electrically with...
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7315908 |
Computer and RFID-based input devices
A computer has at least one input device. The input device includes at least one RF transponder that is configured as part of an RFID device, the at least one RF transponder being controllable by a...
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7292822 |
Wireless communication system using surface acoustic wave (SAW) second harmonic techniques
An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends...
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7246237 |
Method and device for the generation of several channels in an IFF type system
A method of interrogation/response in an IFF type Mode 5 communications system comprises at least the following steps: modulating the header of an interrogation message by using an orthogonal or...
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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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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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7218273 |
Method and device for boresighting an antenna on a moving platform using a moving target
A technique for boresighting an antenna mounted on a moving platform is described. The technique uses a concurrently moving calibration target. Target navigation data and platform navigation data...
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7212123 |
Detector
A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected...
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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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7209071 |
System and method for distance measurement
A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a...
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7196654 |
Vehicle positioning and tracking radar system
A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated...
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7170412 |
Angle of position object location system and method
An object location system and method is provided for locating objects. The system includes an RFID reader, an angle calculator, and a distance calculator to determine which of a plurality of zones...
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7164886 |
Bluetooth transparent bridge
System and method for transparently attaching wireless peripherals to a computer using a Bluetooth wireless network. A preferred embodiment comprises an interface (for example, interface 630 ), a...
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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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7161528 |
Device and method for the suppression of pulsed wireless signals
The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that...
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7158763 |
Multi-IDT SAW hybrid communication system
A SAW communication device has a main IDT mounted on an SAW substrate to receive an RF signal received by an antenna and convert the RF signal to an acoustic wave which travels along the SAW...
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