Systems, methods, and computer-readable media are described for combining digital and analog beamsteering in a channelized antenna array. In some examples, a method can include receiving one or more signals at each of a plurality of groups of antenna elements, each group of antenna elements defining a respective channel from a plurality of channels, and steering, by each respective channel and using analog steering, the one or more signals in a respective direction to yield a steered analog signal pattern. The method can further include converting the steered analog signal pattern associated with each respective channel into a respective digital signal and, based on the respective digital signal, generating, using digital steering, digital signal patterns steered within the steered analog signal pattern associated with the respective digital signal.

In some aspects, a system may receive, from a first one-dimensional radar array, first information based at least in part on first reflections associated with an azimuthal plane. The system may further receive, from a second one-dimensional radar array, second information based at least in part on second reflections associated with an elevation plane. Accordingly, the system may detect an object based at least in part on the first information and may determine an elevation associated with the object based at least in part on the second information. Numerous other aspects are described.

A system and method providing a radar-based motion-sensing user interface suitable for issuing commands to a device or system as a consequence of the detection of user motion, whole-body gestures and/or hand gestures. The system and method derive a three-dimensional representation of a user within a defined space from two-dimensional data obtained from multiple reflected radar signals. The three-dimensional representation is then processed to recognize a human body, and in particular the movement and/or position of the body and/or body parts and joints. The recognized movement and/or position are then compared to a known list of gestures and movements that are associated with particular device/system commands. If one or more of the recognized movements and/or positions conforms with a command movement/gesture, the associated command is issued to the device or system being controlled.

Apparatus and associated methods relate to using a plurality of antennas radially distributed about a rotatable turret to sequentially scan a field of view. Each of the plurality of antennas directs an electromagnetic beam and senses its reflection along a principal direction defined by a roll position of the rotatable turret and an azimuthal beam angle. The principal directions of the antennas have a unique azimuthal beam angle relative to a boresight (i.e., axis of rotation). As the turret rotates, each of these antennas is sequentially turned on at a first roll position and off at a second roll position. This enables electromagnetic beams generated by the antennas to pan a scene both in azimuth and roll. An image processor then determines, based on the reflected signals received by the plurality of antennas, directions to and/or velocities of objects within the scanned field of view.

A radar system having a transmitting antenna including a plurality of linear arrays of transmitting antenna elements arranged on a generatrix of a truncated cone or on a cylindrical surface; a signal generator block operatively connected to the transmitting antenna and adapted to feed the transmitting antenna; a receiving antenna having a plurality of groups of linear arrays of receiving antenna elements arranged on the generatrix of the truncated cone or on the cylindrical surface, in which each group of linear arrays of receiving antenna elements is circumferentially interposed between a first and a second linear array of transmitting antenna elements; a signal processor operatively connected to the receiving antenna, where the signal generator block is adapted and configured to feed the transmitting antenna so that the first and the second linear arrays of transmitting antenna elements emit a first and a second electromagnetic radiation, respectively, at a first and a second frequencies different from each other.

Footwear scanning systems and associated methods are described. According to one aspect, a footwear scanning system includes a base, a shuttle configured to rotate beneath the base, wherein the shuttle comprises an antenna array configured to transmit electromagnetic waves through the base into footwear above the base during the rotation of the shuttle and to receive electromagnetic waves reflected from the footwear during the rotation of the shuttle, a transceiver coupled with the antenna array and configured to apply electrical signals to the antenna array to generate the transmitted electromagnetic waves and to receive electrical signals from the antenna array corresponding to the received electromagnetic waves, and processing circuitry configured to process an output of the transceiver corresponding to the received electromagnetic waves to provide information regarding contents within the footwear.

An electronic device may include wireless circuitry having a set of two or more antennas coupled to voltage standing wave ratio (VSWR) sensors. The VSWR sensors may gather VSWR measurements from radio-frequency signals transmitted using the set of antennas. The antennas may be disposed on one or more substrates and/or may be formed from conductive portions of a housing. Control circuitry may process the VSWR measurements to identify the ranges between each of the antennas in the set of antennas and an external object. The control circuitry may process the ranges to identify an angular location of the external object with respect to the device. The control circuitry may adjust subsequent communications based, adjust the direction of a signal beam produced by a phased antenna array, identify a user input, or perform any other desired operations based on the angular location.

Some embodiments include a method of generating an environment reference model for positioning comprising: receiving multiple data sets representing a scanned environment including information about a type of sensor used and data for determining an absolute position of objects or feature points represented by the data sets; extracting one or more objects or feature points from each data set; determining a position of each object or feature point in a reference coordinate system; generating a three-dimensional vector representation of the scanned environment aligned with the reference coordinate system including representation of the objects or feature points at corresponding locations; creating links between the objects or feature points in the three-dimensional vector model with an identified type of sensor by which they can be detected in the environment; and storing the three-dimensional vector model representation and the links in a retrievable manner.

An antenna system including a first antenna, a second antenna and a third antenna. The antenna system includes a feed for feeding a first common signal to radiator elements of one of the second antenna or third, with a first phase difference between the radiator elements configured for a first polarization and the radiator elements being configured for a second polarization, to create a virtual polarization, wherein the virtual polarization is aligned with one of the first polarization or the second polarization in a first frequency band.

A radar apparatus with a transmission antenna array that outputs a high aspect ratio frequency modulation continuous wave (FMCW) transmission beam that illuminates a large field of regard in elevation and may be both electronically and mechanically scanned in azimuth. The weather radar apparatus includes a receive array and receive electronics that may receive the reflected return radar signals and digitally form a plurality of receive beams that may be used to determine characteristics of the area in the field of regard. The receive beams may be used to determine reflectivity of weather systems and provide a coherent weather picture. The weather radar apparatus may simultaneously process the receive signals into monopulse beams that may be used for accurate navigation as well as collision avoidance.