Abstract: Techniques and apparatuses are described that enable power management using a low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. In one aspect, the radar system can replace other power-hungry sensors and provide improved performance in the presence of different environmental conditions, such as low lighting, motion, or overlapping targets. In another aspect, the radar system can cause other components within the electronic device to switch to an off-state based on detected activity in an external environment. By actively switching the components between an on-state or the off-state, the radar system enables the computing device to respond to changes in the external environment without the use of an automatic shut-off timer or a physical touch or verbal command from a user.

Abstract: A vehicle radar. In the vehicle radar, a high-pass filter is disposed on a signal line connecting a transmitting chip and a receiving chip, the signal line allowing a local oscillation signal to be transferred therethrough. The high-pass filter prevents noise from being introduced through the signal line, along which the local oscillation signal is transferred. This prevents the accuracy of detection from being lowered by low-frequency noise generated from the interior of the vehicle radar. The high-pass filter connected to the signal line is embodied as a variety of configurations, thereby providing a structure able to effectively suppress low-frequency noise while maintaining the existing structure of the vehicle radar.

Abstract: An alignment system and method for a vehicle having a plurality of radar devices utilize a plurality of alignment devices configured to transmit or reflect radar waves towards the vehicle for receipt by the plurality of radar devices and a controller configured to command one of the plurality of alignment devices to perform a base alignment routine of one of the plurality of radar devices to obtain a base alignment, receive, via the plurality of radar devices, reflected radar waves, determine actual phase differences between the reflected radar waves, and based on the determined actual phase differences between the reflected radar waves, the base alignment, and predetermined alignments of a remainder of the plurality of radar devices, generate and output instructions for adjusting the alignment of at least some of the remainder of the plurality of radar devices.

Abstract: A tracking-distance-measuring system capable of tracking a torso object is provided. The tracking-distance-measuring system includes: an image sensor, a controller, a distance-measuring device, and an actuator device. The image sensor is configured to capture an input image. The controller is configured to analyze the input image to recognize a torso object from the input image, and calculate an offset distance between a center of the torso object and a central axis of the input image. The actuator device is configured to carry the distance-measuring device. The controller controls the actuator device to calibrate an offset angle between the distance-measuring device and the recognized torso object according to the offset distance. In response to calibrating the offset angle, the distance-measuring device emits energy and receives reflected energy to detect an object distance of the torso object.

Abstract: An electromagnetic vector sensor (EMVS) system, having a plurality of EMVS devices consisting of a plurality of loop antenna elements spatially orthogonally integrated with and electrically isolated from a plurality of dipole antenna elements, mounted on a rotatably adjustable platform having a true north orientation, including active circuitry residing in antenna housings, and external executing software programs causing the active circuitry in cooperation with the EMVS device and receivers to determine angle of arrival and resolution of incoming wave vectors and polarization of incoming signals and to perform accurate high frequency geolocation signal processing; the programs which perform calibration and antenna element placement determination operations, also cause the system to collect data of known transmitted high frequency skywave signals, and estimate direction of arrival of unknown signals by detecting, resolving and measuring components of an electric field and a magnetic field at a single point.

Abstract: Jamming systems uses wireless signals (e.g., radio waves) to deliberately prevent a target from accurately receiving desired wireless signals. The examples herein disclose an anti-jamming system that mitigates an effect that jamming signals have on a radio receiver. To do so, the anti-jamming system generates a plasma shield in a region of space between the target and the jamming system. Plasma is opaque to electromagnetic energy meaning that radio signals, lasers, microwave energy, and the like are unable to pass through the plasma, and instead, are absorbed by the plasma. As such, the jamming signals emitted by the jamming system are absorbed by the plasma shield and do not interfere with the target's radio receiver.

Abstract: An electromagnetic wave absorber includes a first layer and a second layer disposed on the first layer. The first layer may include a first reinforcing fiber impregnated in a first matrix. The second layer may include a second reinforcing fiber impregnated in a second matrix. The second reinforcing fiber may be plated with a metal magnetic coating layer. The electromagnetic wave absorber may provide electromagnetic wave absorbing ability with a low uncertainty without reducing mechanical properties due to the metal magnetic coating layer.

Abstract: A threat degree of each of targets is numerized based on data obtained by observing the targets after launching of the flying objects. Also, the firepower of flying object is numerized based on the state of flying object after the launching. The optimal assignment of firepower is calculated based on the numerized threat degrees and firepower, and is shared by the flying objects. Each flying object intercepts the target specified based on the optimal assignment.

Abstract: The invention relates to methods, notably carried out by global or regional navigation satellite system (NSS) receivers, which involve receiving satellite-specific, nadir-angle dependent correction information associated with each of at least two NSS satellites among a plurality of NSS satellites. The correction information is useful to correct observed NSS signals, so as to mitigate the effects of satellite-specific, nadir-angle dependent biases in the NSS signals, and thus improve the performance of position determination systems. The invention also relates to methods for generating such correction information, to methods for designing a satellite, to NSS receivers, to apparatuses for generating correction information to be sent to the receivers, and to computer programs and storage mediums.

Abstract: An unmanned aerial vehicle (UAV) landing marker transmits a reply signal in response to receiving radar signals emitted by a UAV. The landing marker can include a passive transponder that emits the reply signal, with the reply signal being a harmonic of the fundamental frequency of the radar signal emitted by the UAV. The landing marker can also include a transmitter to transmit the reply signal. Additionally, the landing marker can include sensors to monitor the environment about the landing marker and this environmental information can be transmitted to the UAV as part of the reply signal.

Abstract: An integrated, externally-mounted Automated Dependent Surveillance-Broadcast (ADS-B) device comprising in one embodiment a 1030 MHz transmitter, a 1030 MHz antenna, a 1090 MHz receiver, a 1090 MHz antenna, a GNSS receiver, at least one GNSS antenna, a 978 MHz transmitter, and a 978 MHz antenna, wherein these components are integrated into a single enclosure, and wherein the GNSS antenna is placed at least partially into a projection extending out from the main enclosure body, such that the GNSS antenna has improved visibility to GNSS signals originating from altitudes above the current altitude of aircraft when the ADS-B device is mounted on the bottom of an aircraft.

Abstract: Broadband slot-coupled stacked patch antenna elements are capable of continuous broadband operation between 1.71 GHz and 2.69 GHz. The broadband slot-coupled stacked patch antenna element includes a mid-band radiating patch, a high-band radiating patch, and a low-band resonator with coupling slots capable of resonating at low, mid, and high band frequencies. Additionally, a low-profile probe-fed patch element is provided for pattern enhancement of antenna arrays at high-band frequencies. This low-profile patch element features fan-shaped probes that have three degrees of tune-ability, namely a length, a width, and a spreading angle. Further aspects include 3-column and 4-column offset arrays of the broadband patch radiators and an interleaved array of the low-profile high-band patch radiators and the broadband radiating elements. A new type of azimuth beam forming network (ABFN) is also introduced for the beam forming of the 3-column and 4-column dual-beam arrays.

Abstract: A chirped radio frequency signal is transmitted across an area of a potential threat. A reflected radio frequency return signal from an open barrel of a weapon at a location within the area of the potential threat is received at an incident angle through an aperture. An antenna at a position in an antenna array detects the reflected radio frequency return signal received at the incident angle through the aperture. The position of the antenna within the antenna array corresponds to a direction from which the reflected radio frequency return signal originates.

Abstract: The following are disclosed: Vehicle parking detection, sensors and an On-Board Device (OBD) to create a parking session. Radars, microwave antennas, rechargeable power supplies and their power management circuits. A localized communications protocol between the wireless nodes and repeaters within a wireless network is disclosed. Wireless sensors and wireline sensors. The networks and/or systems may support parking spot management/monitoring, vehicle traffic analysis and/or management of stationary and/or moving vehicles, monitor storage areas and/or manage production facilities. These networks and/or systems may be operated to generate reports of incorrectly parked vehicles, such as reserved parking spots for other vehicles, vehicles parked in multiple parking spots and/or overstaying the time they are permitted to park.

Abstract: The present invention presents a flexible, stepped frequency, radar based, imaging inspection system. The imaging inspection system can be used in airports, seaport sites, borders, postal processing centres, and sensitive sites. It comprises a millimetre-wave Stepped Frequency Continuous Wave (SFCW) radar module (2) connected to a transmitting channel and a receiving channel. The transmitting channel may comprise a frequency upconvertor (8) and the receiving channel may comprise a frequency downconvertor (10). A digital signal processing unit (14) reconstructs a conductivity profile and a permittivity profile of an object under test (OUT) from measurement data collected via a phase-array antenna or a translational stage (18) based on synthetic aperture focusing (SAF).

Abstract: A method of detecting a mineral or metal in ground includes illumination a target region of the ground with electromagnetic radiation to produce a light signature. The method also analyzes the light signature for the presence of the mineral or metal in the target region and determines if the light signature indicates the mineral or metal is present in the ground.

Abstract: An object detecting apparatus includes reflecting point detecting means, reflecting point setting means, rear-end positional information generating means and object detecting means. The reflecting point detecting means detects position and speed of reflecting point reflecting radar waves. The reflecting point setting means sets high and low level reflecting points, the high level reflecting point having reflection intensity higher first detecting threshold, and the low level reflecting point having reflection intensity higher than second detecting threshold and lower than the first detecting threshold. The rear-end positional information generating means checks whether or not a low level reflecting point is present satisfying a same object condition in a rear-end searching range, and correlates positional information of the low level reflecting point as rear-end positional information with the high level reflecting point used as reference of the searching range.

Abstract: A frequency estimation signal generator component arranged to receive an input frequency signal and to generate therefrom a frequency estimation signal. The frequency estimation signal generator component comprises a counter component arranged to sequentially output a sequence of control signal patterns over a plurality of digital control signals under the control of an oscillating signal derived from the received input frequency signal terns. The frequency estimation signal generator further comprises a continuous waveform generator component arranged to receive the plurality of digital control signals and a weighted analogue signal for each of the received digital control signals, and to output a continuous waveform signal comprising a sum of the weighted analogue signals for which the corresponding digital control signals comprise an asserted logical state.

Abstract: The invention relates to a method and to an apparatus for determining a displacement vector field of a scenario, by a ground-based interferometric radar system operated in multi-bistatic mode and comprising a main radar transceiver device and at least one passive radar receiver device arranged at a predetermined distance from each other, in which the oscillators of the at least two radar are synchronized, in time and in frequency, in particular according to a signal coming from a global positioning system. The method provides a step of interferometrically determining at least one first displacement map and one second displacement map of the scenario between a previous time and a subsequent time, expressed in a global reference system and having each a plurality of pixels each associated to a respective domain of the scenario.

Abstract: The invention relates to a lens apparatus (6) for an optoelectronic sensor (1) of a motor vehicle, comprising a reception lens (8), comprising a support device (9), on which a rear side (10) of the reception lens (8) rests in parts, and comprising a fastening device (12), by means of which the reception lens (8) is held on the support device (9) with a spring force that acts in a first direction (z), wherein the fastening device (12) has a holding frame (15), which surrounds the reception lens (8) at least in parts, and at least one spring element (16), which supports the reception lens (8) in relation to the holding frame (15) in at least one second direction (x, y) that differs from the first direction (z).