Abstract: An enhanced LOng RAnge Navigation (eLORAN) system may include a plurality of eLORAN transmitter stations, and at least one eLORAN receiver device. The eLORAN receiver device may include an eLORAN receive antenna, an eLORAN receiver coupled to the eLORAN receive antenna, and a controller coupled to the eLORAN receiver. The controller may be configured to cooperate with the eLORAN transmitter stations to determine an eLORAN receiver position and receiver clock error corrected from additional secondary factor (ASF) data, the ASF data based upon different geographical positions and different times for each different geographical position.

Abstract: A device for detecting and selectively reflecting an incident microwave signal or millimeter-wave signal is disclosed. The device includes a plurality of antennae disposed in an array; and a diode disposed at each input of each antenna, each diode having an input adapted to selectively receive a reverse bias signal, or a zero bias signal, or a forward bias signal. The device also includes a switching device connected to each input, and configured to selectively apply the forward bias signal, or the reverse bias signal or the zero bias signal to each of the diodes. In forward bias, each of the plurality of antennae reflects the incident microwave signal or millimeter wave signal; and in zero bias or reverse bias each of the plurality of antennae detects the incident microwave signal or millimeter wave signal.

Abstract: Electronic processing systems and methods for collaborating between vehicular threat detection appliances. One system includes a memory, a transceiver, an electronic processor, and a first vehicular 360-degree threat detection appliance that is physically coupled to a first vehicle. The electronic processor is configured to identify a portion of the first vehicular 360-degree threat detection appliance having an obstructed field-of-view. The electronic processor is also configured to detect a second vehicular 360-degree threat detection appliance that is physically coupled to a second vehicle and has an unobstructed field-of-view of the obstructed field-of-view. The electronic processor is further configured to transmit a request to the second vehicular 360-degree threat detection appliance to provide threat detection coverage for the first vehicle in a direction of the obstructed field-of-view.

Abstract: An underwater transmitter may generate underwater pressure waves that encode bits of data. The pressure waves may travel to, and created minute vibrations in, the water's surface. An airborne radar may detect radar signals that reflect from the water's surface. The surface vibrations may modulate the phase of the reflected radar signal. The radar receiver may, based on the variation in the phase of the reflected radar signal, decode the data that was initially encoded in the underwater pressure waves. The underwater pressure waves may be frequency modulated, such as by orthogonal frequency-division multiplexing. Alternatively, the surface vibrations may be detected by a camera, interferometer or other light sensor. Alternatively, the pressure waves may propagate through a media other than water. For instance, the pressure waves may propagate through bodily tissue, or may propagate through oil or a liquid fracking mixture in an oil or gas well.

Abstract: A powered surgical handpiece includes a housing comprising a motor, and a surgical tool removably coupled to the housing and configured to be driven by the motor. The surgical tool includes a radio frequency identification (RFID) tag. The handpiece includes an antenna for wirelessly transmitting RF energy, and a coupler that is electrically isolated from the antenna and the RFID tag and that is configured to guide the transmitted RF energy to the RFID tag.

Abstract: An apparatus for surface inspection comprises a terahertz emitter, a detector, and a computing device. The terahertz emitter is oriented to emit energy toward a surface having a surface layer disposed on the surface in a proximity of a surface feature. The detector is positioned to receive the energy from the terahertz emitter that is reflected by the surface. The computing device is in signal communication with the detector and is configured to detect the surface feature using a signal from the detector.

Abstract: A device for selectively reflecting an incident microwave signal or millimeter-wave signal includes multiple antennae disposed in an array. Each antenna has an input adapted to selectively receive a forward bias signal or a zero bias signal. The device also includes a diode disposed at each input of each antenna. The device also includes a switching device connected to each input, and configured to selectively apply a forward bias or zero bias to each of the diodes. In forward bias, each of the antennae detects the incident microwave signal or millimeter wave signal, and in zero bias, each of the antennae reflects the incident microwave signal or millimeter wave signal.

Abstract: A synthetic aperture radar (SAR) is operable in an interrogation mode and in a self-imaging mode, the self-imaging mode entered in response to determining a response to interrogation pulses have been received from a ground terminal and position information specifying a ground location has been received from the ground terminal. A ground terminal is operable to receive interrogation pulses transmitted by a SAR, transmit responses, and transmit position information to cause the SAR to enter a self-imaging mode. The ground terminal receives first and subsequent pulses from the SAR where subsequent pulses include backscatter and are encoded. The ground terminal generates a range line by range compression.

Abstract: Systems and methods for predicting pest susceptibility, comprising steps to receive geocoded geospatial image data of a crop field from sensors, receive microclimate data of the crop field, determine a crop vigor map for the crop field, and then generate a pest susceptibility map utilizing a risk model based on the crop vigor map and the microclimate data. The pest susceptibility map comprises a measure of a susceptibility of a crop in the crop field to one or more crop pests at one or more locations. In some embodiments, the method also comprises steps to generate a treatment plan (e.g., pesticide application) and to estimate an anticipated return on investment (ROI). The system therefore leverages remote-sensed data, machine data, analytics, and machine learning to enable farmers to predict, prevent, and control the outbreak of crop pests to greatest economic effect. Such a system addresses a fundamental problem in agriculture.

Abstract: A polarimetric radar system for detecting and classifying objects positioned in an interior of a vehicle includes a radar transmitter unit for transmitting radar waves of at least two different polarizations, a radar receiving unit for receiving radar waves of at least two different polarizations, a radar signal generating unit for generating and providing radar waves to be transmitted by the at least one radar transmitter unit, a signal processing circuitry for processing the generated radar waves and the received radar waves and a signal evaluation unit that is configured to receive processed signals from the signal processing circuitry, to estimate values for a set of predetermined object parameters on the basis of the received processed signals, and to select an object class upon detecting a match of the estimated values for the set of object parameters with one out of a plurality of predetermined sets of object parameters.

Abstract: A mounting device is provided for mounting a detection device, which is configured to detect electromagnetic waves having a frequency of 30 GHz or greater excluding visible light, on a human-powered vehicle. The detection device includes a support mechanism that is configured to support the detection device so that the detection device is movable relative to the human-powered vehicle in accordance with motion of the human-powered vehicle.

Abstract: A system for performing a medical procedure on a patient is provided. The system can include an imaging head defining a field of view relative to the patient. The imaging head can include at least one transmitter that emits at least one signal in the field of view, and at least one receiver that receives at least one reflected signal from the field of view. The at least one reflected signal received can be based on at least one electrical property of at least one material in the field of view. The system can further include a workstation, which can determine, based on the at least one reflected signal received by the at least one receiver, a location of at least one boundary of the material within the field of view. The system can include a display that displays an image of the location of the at least one boundary.

Abstract: Systems and methods to process overhead imagery received from overhead image sources are described herein. Examples include accessing an aerial image including a property, determining an owner of the property, determining whether the owner of the property is eligible to be a member of a financial institution, determining whether the owner of the property has property insurance with the financial institution for the property type of the property in the aerial image, and presenting an offer for insurance to insure the property in the aerial image when the owner is determined to be eligible for the financial institution and does not already have insurance with the financial institution. Examples include accessing an aerial image of properties, determining damage estimates, and reserving resources to repair the properties based on the damage estimates.

Abstract: Airborne systems and methods for the detection, location and obtaining of images of buried objects and for the characterization of the composition of the subsoil. The systems comprise at least one aerial module with a radar unit that emits and/or captures radar signals and a positioning and guidance system with an accuracy equal to or less than 3 cm, and a ground station with a flight control system and a radar signal processing unit where radar signal processing algorithms are applied. The invention also comprises a method for the detection, localization and obtaining of images of buried objects and a method for the characterization of the composition of the subsoil. Applicable in sectors where it is necessary to perform the detection of buried objects, as for example in civil applications (detection of antipersonnel mines), pipeline inspection or in archaeology.

Abstract: An electromagnetic imaging system for creating an image of an object is disclosed. The electromagnetic imaging system comprises at least one transmit antenna, multiple receive antennas, a control unit, a processing unit, and an interference detection unit. The at least one transmit antenna is configured to generate radiofrequency signals with at least one planned frequency at several planned times. The multiple receive antennas are configured to receive radiofrequency signals and to generate a corresponding measurement signal. The control unit is configured to control at least the multiple transmit antennas. The processing unit is configured to process the measurement signal into the image of the object. The interference detection unit is configured to detect and analyze an interference signal in the measurement signal, and the interference detection unit is connected to the control unit in a signal transmitting manner so as to control the control unit.

Abstract: An automated system for mitigating risk from a wind turbine includes a plurality of optical imaging sensors. A controller receives and analyzes images from the optical imaging sensors to automatically send a signal to curtail operation of the wind turbine to a predetermined risk mitigating level when the controller determines from images received from the optical imaging sensors that an airborne animal is at risk from the wind turbine.

Abstract: The present disclosure is directed to a method for applying an agrochemical to an agricultural area of interest based on information generated from a remote sensing survey. A remote sensing survey is performed within or adjacent to the agricultural area of interest wherein the survey generates remotely sensed data. The remotely sensed data can be analyzed and/or interpreted to determine whether to apply an agrochemical based on an insect presence within or adjacent to the agricultural area of interest. In one embodiment, an agrochemical can be applied within or adjacent to the agricultural area of interest.

Abstract: Architecture and techniques for identifying types of objects based upon disruption of signal strength of millimeter-wave (mmW) transmitted signals caused by objects interfering with or blocking transmitted signals within a wireless communication network. In particular, types of objects may be identified based upon drops in signal strength due to objects moving between a transmission point and a receiving device. Based on factors including one or more of a size of an object, materials that make up the object, etc., the object causes a drop in received signal strength, thereby causing a change in a pattern of received signal strength. The changed pattern may be compared with base patterns that are correlated with a type or identity of an object in order to identify the object.

Abstract: A radio frequency (RF) imaging device comprising a display receives a three-dimensional (3D) image that is a superposition of two or more images having different image types including at least a 3D RF image of a space disposed behind a surface. A plurality of input control devices receive a user input for manipulating the display of the 3D image. Alternatively or additionally, the radio frequency (RF) imaging device may receive a three-dimensional (3D) image that is a weighted combination of a plurality of images including a 3D RF image of a space disposed behind a surface, an infrared (IR) image of the surface, and a visible light image of the surface. A user input may specify changes to the weighted combination. In another embodiment, the RF imaging device may include an output device that produces a physical output indicating a detected type of material of an object in the space.

Abstract: An illumination device including a light source array and a diffractive optical element (DOE) is provided. The light source array includes a plurality of point light sources arranged in an array. The diffractive optical element includes a plurality of diffractive areas respectively aligned with the point light sources. The diffractive areas respectively diffract lights from the point light sources to an illuminated object, so as to superimpose the lights to form a uniform bright area on the illuminated object.

Abstract: A work machine includes a frame and a set of ground engaging elements movably supported by the frame and driven by an engine to drive movement of the machine in a worksite. The machine includes a location sensor configured to generate a machine location sensor signal indicative of a location of the machine. The machine includes a communication component that communicates with a worksite server and retrieves object location data. The machine also includes virtual model generator logic that determines the object is within a field of view of an operator of the machine, based on the machine location sensor signal and object location data, and generates an augmentation indication indicative of the determination. The machine includes augmentation logic that generates and displays an augmented reality overlay, based on the augmentation indication, and displays an indication of the object proximate the object within the field of view of the operator.

Abstract: The invention relates to a system for actuating signal transmitters that are arranged on aviation obstacles, which are obstacles for low-flying airplanes, and signal transmitters for optically warning the airplanes or the pilots thereof, having the following features: a) at least one large-area radar system which is designed to detect airplanes flying at very low altitudes and which is arranged at a location remote from the aviation obstacles, b) at least one computer device which is coupled to the large-area radar system so as to transmit signals and which is designed to evaluate the data provided by the large-area radar system, said data relating to detected airplanes, and to provide such data to other systems via a data connection, and c) at least one data connection between the computer device and multiple aviation obstacles and/or groups of aviation obstacles, wherein d) the computer device is designed to output activation signals for the signal transmitters of aviation obstacles which are being approach

Abstract: A method for forming 3D image data representative of the subsurface of infrastructure located in the vicinity of a moving vehicle. The method includes: rotating a directional antenna, mounted to the moving vehicle, about an antenna rotation axis; performing, using the directional antenna whilst it is rotated about the antenna rotation axis, a plurality of collection cycles in which the directional antenna emits RF energy and receives reflected RF energy; collecting, during each of the plurality of collection cycles performed by the directional antenna.

Abstract: A WEM-based method for deep resource detection using sky waves refers to the technical field of deep resource detection. The proposed method of deep detection using sky waves improves the traditional “atmospheric-lithosphere” half-space propagation theory into a full-space “sky wave” theory of “ionosphere-atmosphere-rock layer”, that is, the influence of the ionosphere and the displacement current in the air are taken into consideration to obtain a new precise expression of “sky wave” response, which is suitable for full space, slow attenuation and long distance propagation. A receiving device for sky wave signal has been developed. Through theoretical model calculation and actual data measurement, it is known that it is possible to use the sky wave for detection within the scope of China's national territory to realize the high-precision electrical structural exploration within a depth of 10 kilometers and open a new era of artificial source electromagnetic detection.

Abstract: A system and method to perform target detection includes transmitting frequency modulated continuous wave (FMCW) pulses as chirps from a radar system. The method also includes receiving reflections resulting from the chirps, and processing the reflections to obtain a range-chirp map for each beam associated with the transmitting. Curve detection is performed on the range-chirp map for each beam, and one or more targets is detected based on the curve detection.

Abstract: A radar apparatus is provided which includes a counter which counts a transmission count of pulse codes from start of measurement, a pulse code generator which selects a complementary group from among a plurality of complementary groups obtained by grouping a plurality of pulse codes generated by at least one code coupling process on at least one basic code pair as complementary codes every time the transmission count is an integral multiple of a code count in the plurality of complementary groups, and a transmitter which transmits the pulse codes belonging to the selected complementary group.

Abstract: Systems, methods, and apparatus for determining an estimated depth of a buried object using sheet current flow models are disclosed. In one embodiment a buried object locator includes a processor to process magnetic signals emitted from the buried object using a closed form sheet current flow model taken from multiple spaced-apart positions to determine, store, and/or display estimated depth information of the buried object.

Abstract: A method and system for controlling a passage from a secured location to an unsecured location based on presence detection of the unsecured location, including: a radar system in the secure location configured to transmit radar signals to and receive radar signals from the unsecured location; on determination of the presence, by the radar system, of a first person in the unsecured location proximate to the passage, providing an alert. The determination of the presence of the first person in the unsecured location may be triggered by a second person in the secured location moving proximate to the exit or by the second person in the secured location requesting to exit through the passage.

Abstract: A method and a surface penetrating radar (SPR) system for localization of a vehicle are disclosed. The method includes transmitting a radar signal having a first frequency into a subsurface region adjacent to a vehicle. A first set of SPR images of a first subsurface volume within the subsurface region is acquired and location data for the vehicle are determined from the first set of SPR images. A second radar signal having a frequency that is greater than the first frequency is transmitted into the subsurface region and a second set of SPR images of a second subsurface volume within the subsurface region is acquired. The second subsurface volume at least partially overlaps the first subsurface volume. Location data are determined from the second set of SPR images at a greater resolution than the location data determined from the first set of SPR images.

Abstract: Technology projecting a layout is provided. The technology may include an apparatus having a location sensor that determines location data of a projection apparatus associated with a physical premises; a layout engine, that receives a blueprint of the physical premises determines a location of the projection apparatus relative to objects depicted by the blueprint, identifies projection area coordinates of a projection area of a portion of the blueprint related to the location of the projection apparatus, and identifies object coordinates of objects from the blueprint within the projection area; a projection engine, that receives the object coordinates of the objects, calculates mirror positions of the projection apparatus based on the object coordinates of the objects; and a projector projecting a representation of the object coordinates on a physical surface using the mirror positions.

Abstract: The invention discloses an omnidirectional vector electrostatic levitation geophone, comprising: a regular tetrahedron hollowed-out structure, and an inner hollowed-out base and an outer hollowed-out base that are provided inside and outside the regular tetrahedron hollowed-out structure and at equal distance from the regular tetrahedron hollowed-out structure, and have the same structure as and different size from the regular tetrahedron hollowed-out structure; the regular tetrahedron hollowed-out structure has a solid part and a hollowed-out part of each surface thereof, the solid part is a quadrangle divided from angular bisectors of two angles on each surface and an isosceles triangle that abuts the solid part by a surface central point, and the hollowed-out part is two triangles that are divided from the angular bisectors of the two angles and abut each other by a surface center.

Abstract: An object position detection apparatus 1 includes a distance image generation unit 10 which generates a two-dimensional distance image by measuring a distance to a subject including an object on the basis of a light transmission time, an object image generation unit 16 which generates an object image in which the object is extracted from the distance image of the subject, and an installation angle detection unit 20 which detects an installation angle of the distance image generation unit 10. The object image generation unit 16 includes a differentiator 17 which performs a process of removing a background other than the object from the distance image of the subject and a threshold value d for removing the background in the differentiator 17 is set in response to the installation angle of the distance image generation unit 10 detected by the installation angle detection unit 20.

Abstract: A handheld radiation image detecting system and an operation method thereof are provided. The handheld radiation image detecting system includes a handheld device including a radiation emitter and a first transceiver and a sensing device including a radiation image sensor and a second transceiver. The first transceiver is coupled to the radiation emitter and used for generating a first wave with directionality. The second transceiver is used for receiving the first wave and for generating a second wave with directionality, and the first transceiver is used for receiving the second wave.

Abstract: According to an embodiment, a method for presence detection includes performing a first scanning comprising scanning a first area using a millimeter-wave radar sensor to produce a first set of radar data; identifying a first set of targets based on the first set of radar data; performing a second scanning comprising scanning portions of the first area corresponding to the first set of targets using the millimeter-wave radar sensor, and performing micro-Doppler measurements on the portions of the first area; and determining which targets of the first set of targets meet a first set of criteria based on the micro-Doppler measurements.

Abstract: A moving object detection circuit for detecting movement information of a measured object. The moving object detection circuit includes a mixing circuit, an analog-to-digital conversion circuit, a mixing unit, and a distance detecting unit. The mixing circuit mixed the RF carrier signal and a first analog signal to generate a second analog signal. The first analog signal is generated by a signal reflected from the measured object. The analog-to-digital conversion circuit coupled to the mixing circuit for generating a digital signal according to the second analog signal. The mixing unit mixed an IF signal and a first/second IF carrier signal to generate a first/second signal. The distance detecting unit generated a detection result according to the first signal and the second signal. The detection result is corresponding to a distance between the measured object and the moving object detection circuit.

Abstract: This document describes techniques and devices for non-line-of-sight radar-based gesture recognition. Through use of the techniques and devices described herein, users may control their devices through in-the-air gestures, even when those gestures are not within line-of-sight of their device's sensors. Thus, the techniques enable users to control their devices in many situations in which control is desired but conventional techniques do permit effective control, such as to turn the temperature down in a room when the user is obscured from a thermostat's gesture sensor, turn up the volume on a media player when the user is in a different room than the media player, or pause a television program when the user's gesture is obscured by a chair, couch, or other obstruction.

Abstract: A method for testing the internal structure of a refractory part, has the following steps: a) by a transmission antenna, sending at least one electromagnetic wave, termed a “pulse”, into the refractory part to be tested; b) by a reception antenna, receiving the pulse after reflection thereof by a reflecting zone of the refractory part; c) analyzing the time offset between the two preceding steps in order to deduce the position, in the refractory part, of the reflecting zone, the pulse having a duration less than or equal to 0.5 nanoseconds.

Abstract: A method for producing a depth map from a detection region of the Earth's surface, a detection region being arranged in an underground pipeline, wherein the method includes recording at least one image sequence via at least one camera, determining the position and orientation of the camera corresponding to each individual recording, determining a spatial position and orientation of the underground pipeline arranged in the detection region, producing the depth map of the detection region via a plane sweep method based on the individual recordings and the associated camera positions, where the maximum depth region of the plane sweep method is subdivided into a total of N sections in an adaptive manner, i.e., in accordance with a predetermined minimum layer thickness for the ground covering the underground pipeline, via a predetermined number of planes spaced differently from one another and extending parallel with respect to one another.

Abstract: A narrowband impulse radio system includes a transmitter, transmitting a plurality of harmonic signals, and a receiver, receiving the signals, wherein the signals cooperate in a constructive alignment to yield a narrowband impulse signal of amplitude approximately equal to the sum of the amplitudes of the plurality of harmonic signals. The transmitter or the receiver may employ a plurality of phase shifters to effect the cooperation in the transmitted or received signals, respectively. The harmonic signals cooperate to yield a quasi-DC signal whose pulse rate equals the fundamental harmonic frequency. In a preferred embodiment, the narrowband impulse transmitter further includes a plurality of transmit modules each transmitting one of the plurality of harmonics. The plurality of transmit modules may employ magnetic antennas characterized by a magnetic axis aligned at an angle of approximately 55 degrees relative to a common axis, or in other embodiments, may employ mechanically rotating permanent magnets.

Abstract: The present disclosure relates to a security inspection system and method using the three-dimensional holographic imaging technology. The system comprises: a body frame; a millimeter-wave transceiving module, disposed on the body frame; and at least two millimeter-wave switch antenna arrays, connected with the millimeter-wave transceiving module; the number of the millimeter-wave switch antenna arrays being the same as that of the scan areas; a scan driving device, configured to drive the at least two millimeter-wave switch antenna arrays to rotate along the same direction; a control device, configured to control the scan driving device to generate a rotation angle signal; and a parallel-image processing module, configured to synthesize a three-dimensional holographic image of an under-test object according to echo signals collected by the millimeter-wave transceiving module and spatial position information of the echo signals.

Abstract: A mobile X-ray imaging apparatus includes a main body, a driving wheel provided in a lower portion of the main body and capable of moving the main body, a drive motor configured to drive the driving wheel, a motor encoder configured to detect a rotation speed of the drive motor, a driving wheel rotation state detector configured to detect a rotation state of the driving wheel, the driving wheel rotation state detector comprising a rotation state detection sensor located at the main body, and a bracket coaxially connected to the driving wheel and allowing the rotation state detection sensor to detect an ON/OFF state according to the rotation state of the driving wheel, and a controller configured to control the drive motor based on information detected by the motor encoder and the driving wheel rotation state detector.

Abstract: This document describes techniques for fine-motion virtual-reality or augmented-reality control using radar. These techniques enable small motions and displacements to be tracked, even in the millimeter or sub-millimeter scale, for user control actions even when those actions are small, fast, or obscured due to darkness or varying light. Further, these techniques enable fine resolution and real-time control, unlike conventional RF-tracking or optical-tracking techniques.

Abstract: Systems and method are provided for using millimeter-wave radar for terrain-aided navigation in support of autonomous guidance, landing, and mapping functions in all weather for unmanned air vehicles (UAVs). In an embodiment, a UAV can generate a map, based on millimeter-wave (MMW) radar returns, that rejects a large number of radar measurements as clutter and generates a flight path using waypoints based on the map. Embodiments of the present disclosure provide a means of correlating MMW radar returns with high resolution terrain maps to enable navigation in GPS-denied environments. This process significantly reduces cost, development time, and complexity when compared to conventional approaches.

Abstract: All of a plurality of analog-to-digital converters (ADCs) each operating in a first mode of operation within a spectrum of interest sample a signal received at one of a plurality of antennas, with the outputs of the ADCs processed to detect signals of interest based on a threshold. For each of the plurality of antennas, a corresponding one of the plurality of ADCs operating in a second mode of operation samples signals received at the one of the antennas such that signals received are sampled at all of the plurality of antennas, with the outputs of the ADCs processed to calculate an angle of arrival for at least one detected signal of interest using phase interferometry. Bandpass or non-uniform under-sampling may be employed to sample all of the antennas at a relatively low data rate.

Abstract: The present invention relates to a parking support Apparatus and Method of operation comprising of an mm-wave radar sensor, having an integrated mm-wave IC front end. The proposed Apparatus is capable of detecting the parking obstacle object distance and angle, having inherently low cost system topology, suitable as a replacement in functionality for the commonly used ultrasound sensors. The proposed apparatus topology consist of one transmitting and two planar antennae, mm-wave radar topology with one down conversion chain and one transmitter chain based on FMCW radar, CW radar and Doppler radar, analog combining circuitry and N mm-wave power detectors, where N takes integer values from 1 and larger. The specific proposed method of operation is adjusted to a dedicated application. A combination of more than one proposed apparatus enables smart observation of the parking area in front of the moving platform with wired or wireless connection to the information evaluation and control entity.

Abstract: There are provided a security inspection system comprising ultra-wideband transmitters (104) and receivers (103) and a method of security inspection. The method comprises scanning a walk-through inspection space (200) along with an inspected person passing there through to yield collected data informative of scattered signals in association with respective channels, wherein the ultra-wideband transmitters and receivers are arranged at both sides of the inspection space. The method further comprises dividing the inspection space into a plurality of subspaces such that each voxel in the inspection space belongs to one and only one subspace, providing image reconstruction separately for each subspace of the plurality of the subspaces, wherein image reconstruction for voxels residing in a given subspace is provided using collected data corresponding to a set of channels selected for the given subspace in accordance with predefined rules; and using image reconstruction results to detect a concealed object.

Abstract: The concepts, systems and methods described herein are directed towards frequency jump burst-pulse-Doppler (FJB-PD) waveforms and processing to provide wideband, high range resolution (HRR) radar profiling capability in a clutter dense environment. The method includes transmitting a FJB-PD waveform comprising a plurality of frequency steps over a predetermined time period with each frequency step having a plurality of pulses. The method further includes receiving one or more FJB-PD pulse returns corresponding to the FJB-PD waveform and identifying one or more target detections in the one or more FJB-PD pulse returns. A set of range swaths may be extracted for each of the one or more target detections and a wideband spectrum may be generated for each of the sets of range swaths using FJB coherent integration. A clutter suppressed HRR profile may be generated for each of the target detections based on the respective wideband spectrum.

Abstract: Provided is a micro robot position detection device. The device includes a micro robot position detection unit that uses a micro robot control parameter to filter a reflected signal of an ultra wide-band impulse radar signal emitted to a micro robot to extract, as a micro robot signal, a natural oscillating frequency signal generated when the micro robot is driven through control of external electromagnetic field, and analyzes the micro robot signal based on a transmission and reception parameter of the ultra wide-band impulse radar signal to calculate position information for the micro robot. Also, the device may further include an image matching unit that receives position information for the micro robot and performs position correction on the received position information based on pre-stored reference image data and the image data.

Abstract: RFID tags are combined in increase their range. A first RFID tag comprises a first chip and a first antenna configured to transmit data from the chip. The first RFID tag has a first initial range by which data may be obtained by an RFID reader from the first chip. A second RFID tag comprises a second chip and a second antenna configured to transmit data from the chip. The second RFID tag has a second initial range by which data may be obtained by an RFID reader from the second chip. A conductive path from first antenna to the second antenna is established to change initial ranges to modified ranges which are greater than the initial ranges.

Abstract: Provided are methods of using electromagnetic waves for detecting metal and/or dielectric objects. Methods include directing microwave and/or mm wave radiation in a predetermined direction using a transmission apparatus, including a transmission element; receiving radiation from an entity resulting from the transmitted radiation using a detection apparatus; and generating one or more detection signals in the frequency domain using the detection apparatus. Methods may include operating a controller,' wherein operating the controller includes causing the transmitted radiation to be swept over a predetermined range of frequencies, performing a transform operation on the detection signal(s) to generate one or more transformed signals in the time domain, and determining, from one or more features of the transformed signal, one or more dimensions of a metallic or dielectric object upon which the transmitted radiation is incident.