Abstract: The invention relates to a monitoring system for the air-traffic control of flight objects (5, 6), which have transmitting units for emitting air-traffic control radio signals (ADS-B), wherein the air-traffic control radio signals (ADS-B) containing flight data concerning the respective aircraft (5, 6), the monitoring system comprising a plurality of receiving units (4a to 4c), which are designed to receive the emitted air-traffic control radio signals, wherein a plurality of satellites (1a to 1c) are provided, which each have communication means for forming a common satellite communication network and on each of which at least one of the receiving units (4a to 4c) is arranged, wherein the receiving units (4a to 4c) are connected to the communication means of the respective satellite (1a to 1c) and are designed to transmit the flight data contained in the air-traffic control radio signals to at least one ground station (3, 7) having a communication connection to the satellite communication network using a com

Abstract: A multiple input multiple output (MIMO) antenna for a radar system that includes a receive antenna, a first transmit antenna, and a second transmit antenna. The receive antenna is configured to detect radar signals reflected by a target toward the receive antenna. The first transmit antenna is formed of a first vertical array of radiator elements. The second transmit antenna is formed of a second vertical array of radiator elements distinct from the first vertical array. The second transmit antenna is vertically offset from the first transmit antenna by a vertical offset distance selected so an elevation angle to the target can be determined.

Abstract: A system and method for an arrayed sensor to resolve ambiguity in received signals, improve direction of arrival accuracy and estimate a location of one or more targets in an environment including signal interference.

Abstract: An altimeter system is provided. The altimeter system includes a receiver mixer including an antenna-input and a local-oscillator-input; a transceiver circulator communicatively coupled to an antenna via a transmission line having a selected length and communicatively coupled to the antenna-input of the receiver mixer; and a transmitter configured to output a transmitter signal to the antenna via the transceiver circulator. The transmitter signal is frequency modulated with a linear ramp. The transmitter is communicatively coupled to the receiver mixer to input a local oscillator signal at the local-oscillator-input of the receiver mixer. The receiver mixer is communicatively coupled to input a target-reflected signal from the antenna at the antenna-input of the receiver mixer. The selected length of the transmission line is set so that a composite-leakage signal at the antenna-input of the receiver mixer has a linear phase across a sweep bandwidth.

Abstract: A radar sensor having multiple antenna elements for transmitting and receiving radar signals, an associated transmitting and receiving element and an evaluation device for determining the azimuth angle of located objects on the basis of a relationship between the signals received from different antenna elements, wherein the transmitting and receiving element is designed to supply to the antenna elements transmission signals in parallel, the frequencies of which are offset with respect to one another, and the evaluation device is designed to distinguish between signals that were transmitted by different antenna elements on the basis of the frequency offset.

Abstract: Weather radar for measuring radar signals in the GHz range with a receiver containing at least one signal path, the receiver comprising a receiving facility for an incoming radar signal, on which a test signal generated by a test signal generator is superimposed in a coupler, and a processing device to amplify, filter and convert both signals to lower frequencies, wherein for filtering a matched filter is provided, and with an evaluation device in which calibration parameters of the signal path are derived from the test signal for the frequency of the test signal in order to determine the signal strength of the received radar signal, wherein the test signal is superimposed with at least one frequency differing from the frequency of the radar signal, so that the radar signal and the test signal are processed separately from one another by the evaluation device, and the calibration parameters of the signal path for the frequency of the radar signal are determinable from the test signal through a modeling of the

Abstract: A radar transceiver is disclosed. The radar transceiver includes a computing unit, a sweep control unit, a set of transmitters for transmitting radar chirps to targets, a set of receivers for receiving reflected chirps from the targets, and a timing engine processor coupled to the set of transmitters and to the set of receivers and configured to transmit a first set of control signals. The timing engine processor receives a second set of control signals generated by the computing unit. The sweep control unit receives a first control signal and a second control signal from the timing engine processor. The first control signal indicating a start time of a chirp and the second control signal indicating a reset time for resetting the chirp. A controlled phased lock loop (PLL) generates a local oscillator signal which is inputted to transmitters and receivers.

Abstract: Embodiments of the present invention are directed to monopulse radar antenna synthesis and methods thereof. An antenna array includes a number of sub-arrays operatively arranged in a first direction (e.g., azimuth), and each of the sub-arrays includes a number of antenna elements grouped as a first group and a second group adjacent to each other in a second direction substantially perpendicular to the first direction. The antenna array can perform monopulse processing in the elevation direction by synthesizing two monopulse antennas by to form monopulse antennas with phase centers that differ in elevation.

Abstract: A multiple input multiple output (MIMO) antenna for a radar system includes a receive antenna, a first transmit-antenna-arrangement, and a second transmit-antenna-arrangement. The receive-antenna is configured to detect radar-signals reflected by a target toward the receive-antenna. The first transmit-antenna-arrangement includes a first vertical-array of radiator elements and a second vertical-array of radiator elements. The first transmit-antenna-arrangement is configured so the first vertical-array can be selectively coupled to a transmitter independent of the second vertical-array. The second transmit-antenna-arrangement includes a third vertical-array of radiator elements and a fourth vertical-array of radiator elements. The second transmit-antenna-arrangement is configured so the third vertical-array can be selectively coupled to a transmitter independent of the fourth vertical-array.

Abstract: A GWR level gauge system for determining a filling level in a tank. The system comprises a tank, a transceiver, a surface waveguide comprising a single conductor transmission line probe, connected to the transceiver, arranged extending vertically into the tank and configured to guide the electromagnetic transmission signals towards the surface and to guide the reflected electromagnetic signals back to the transceiver; processing circuitry connected to the transceiver and configured to determine the filing level based on received reflected electromagnetic signals; a plurality of retaining elements arranged in fixed positions in relation to an inside of the tank and spaced apart along the probe, wherein each of the retaining elements circumscribes the probe, and is configured to allow movement of the probe in a vertical direction relative the retaining element, and to restrict movement of the probe in a horizontal direction relative the retaining element.

Abstract: An altimeter system is provided. The altimeter system includes a receiver mixer including an antenna-input and a local-oscillator-input; a transceiver circulator communicatively coupled to an antenna via a transmission line having a selected length and communicatively coupled to the antenna-input of the receiver mixer; and a transmitter configured to output a transmitter signal to the antenna via the transceiver circulator. The transmitter signal is frequency modulated with a linear ramp. The transmitter is communicatively coupled to the receiver mixer to input a local oscillator signal at the local-oscillator-input of the receiver mixer. The receiver mixer is communicatively coupled to input a target-reflected signal from the antenna at the antenna-input of the receiver mixer. The selected length of the transmission line is set so that a composite-leakage signal at the antenna-input of the receiver mixer has a linear phase across a sweep bandwidth.

Abstract: A method for detecting targets using a mobile radar having a rotary antenna, notably small targets buried in radar clutter, without increasing the number of false detections, includes determining pre-detections during N antenna revolutions, including determining pre-detections revolution by revolution, each pre-detection being stored in a grid of cells centered on the position that the radar occupied at the start of the current revolution, each grid cell corresponding to an azimuth range and a distance range. This step also includes, at the end of each revolution, a step of shifting all the pre-detections stored in the grid during the previous revolutions by the movement undergone by the radar during the last revolution. The method also includes determining detections, a target being detected from the moment that a set of pre-detections stored in the grid has its distances to the radar which constitute a linear progression during the N antenna revolutions.

Abstract: It is an object of the present invention to provide a radar device and a velocity calculation method with which velocity can be calculated more accurately. A radar device 1 comprises a transmitter 23, a first velocity calculator 31a, a second velocity calculator 31b, a first velocity corrector 33a, and a second velocity corrector 33b. The transmitter 23 transmits pulse signals at two or more different pulse repetition frequencies. The first velocity calculator 31a calculates a first Doppler velocity based on a first received signal. The second velocity calculator 31b calculates a second Doppler velocity based on a second received signal. The first velocity corrector 33a calculates a first corrected Doppler velocity by folding correction of the first Doppler velocity. The second velocity corrector 33b calculates a second corrected Doppler velocity by folding correction of the second Doppler velocity.

Abstract: An FMCW type radar level gauge configured to transmit an electromagnetic transmit signal and receive an electromagnetic return signal reflected from the surface, the electromagnetic transmit signal having a bandwidth of at least 1 GHz, a relative bandwidth (max frequency/min frequency) of less than 2.5 and an upper frequency limit less than 4 GHz. The gauge comprises a single conductor probe mechanically suspended in the tank and extending into the product in the tank, and a matching arrangement providing an electrically matched connection between an electrical feed-through and the single conductor probe. According to the present invention, the relatively expensive still-pipe is replaced with a relatively inexpensive a single conductor acting as a surface wave-guide (SWG).

Abstract: A multi-frequency projected energy gun system and method delivers energy to a target. The method includes generating simultaneously at least two signals from a source, amplifying the signals, combining the signals, and transmitting the signals into a medium or a vacuous space. The source includes one or more of a plurality of waveform generators configured to simultaneously generate at least two signals simultaneously. The signals are amplified by a power amplifier configured to amplify the power of the at least two signals. The signals are transmitted by one or more of a plurality of antennas configured to transmit the at least two signals simultaneously into a medium or a vacuous space.

Abstract: The present invention provides an artificial microstructure. The artificial microstructure includes at least three split rings. The at least three split rings surround and embed in turn. Each split ring is formed by a wire which is made of conductive material, with two terminals of the wire towards each other to form an opening of the corresponding split ring. The present invention also provides an artificial electromagnetic material using the artificial microstructure. The artificial electromagnetic material with the artificial microstructure can achieve the function of broadband wave-absorbing.

Abstract: A sensor system for detecting one of Improvised Explosive Devices (IEDs), landmines or other buried explosives, the sensor system is mounted in place of a standard backhoe digging bucket of a backhoe vehicle. The sensor system includes a mounting portion having arc swing points for hanging the sensor system on a backhoe arm, and a holding pin opening for receiving a holding pin when positioned in a mounting position on the backhoe arm; and an electronic sensor wand arm assembly mounted to the mounting portion.

Abstract: The invention relates to a driver assistance device (2) for a vehicle (1), which driver assistance device has a radar appliance (3, 4) for determining measured variable (?1, ?2, R1, R2) referenced to an object (10) that is external to the vehicle, wherein the radar appliance (3, 4) comprises: at least a first and a second reception antenna (14, 15), each for receiving signals (SE1, SE2); a first down-converter (17), which is coupled to the first reception antenna (14) via a first reception path (16), and a second down-converter (23), which is coupled to the second reception antenna (15) via a second reception path (21), for down-converting the received signals (SE1, SE2) into respective baseband signals (SB1, SB2); a control device (5) for determining the measured variable (?1, ?2, R1, R2) using the baseband signals (SB1, SB2); and test means (32) for producing a local check signal (SP) and for coupling the check signal (SP) into the first reception path (16) and into the second reception path (21), as a resu

Abstract: A radar includes an antennal structure, with means for transmitting an impulse signal in a band centered on F1 according to a repetition period centered on a recurrence period Tr1 and pulse width T1, with means for receiving signals by the antenna in frequency band ?F, with a unit for processing the signals received on a set of N distance bins. The signals received are transmitted by another radar in a frequency band centered on F2 where F2?F1??F, according to a repetition period centered on a period Tr2 and pulse width T2. The signals transmitted by the two radars are asynchronous. The method comprises: slaving frequency F1 to frequency F2, by measuring the power received integrated over the N distance bins and over several recurrences, determination of period Tr2 and T2 and slaving the period centered on Tr1 to a period centered on Tr2 with Tr1=k*Tr2.

Abstract: Disclosed herein is a meteorological observation system using vehicles. The meteorological observation system using vehicles includes a meteorological observation device embedded in each of the vehicles and configured to periodically detect surrounding weather information and to photograph weather conditions, the vehicle configured to run on a road using radar devices for detecting the front and right and left sides of the vehicle, that is, sensors for supporting driving and prevent a collision, and to provide mobility to the meteorological observation device, a meteorological server configured to collect pieces of the weather information from the meteorological observation devices moving in respective areas through wireless communication and to provide the pieces of weather information to a meteorological observation center, the meteorological observation center configured to use information, received from the meteorological server, as statistical data or meteorological observation and forecast data.