According to one embodiment, a radar device includes antenna panels. The antenna panels include a first transmission panel, first reception panel, and second reception panel, or the antenna panels include a first transmission panel, second transmission panel, and first reception panel. The first transmission panel includes antennas at intervals of m times a substantially half wavelength where m is a positive integer of two or more. The first reception panel includes antennas at intervals of n times the substantially half wavelength where n is a positive integer of two or more, and m and n are coprime to each other.

A terahertz security inspection robot is provided, including: a housing including a main housing and a head housing rotatably connected to the main housing; a terahertz wave imaging mechanism including a mirror assembly arranged in the head housing and a detector array arranged in the main housing; and a rotating mechanism configured to cause the head housing and the mirror assembly located in the head housing to rotate with respect to the main housing, so that the mirror assembly of the terahertz wave imaging mechanism is oriented in different directions to respectively perform terahertz scanning and imaging on objects to be inspected in different inspection regions in a security inspection scene.

An imaging apparatus includes: a reflector which covers an imaging space on a pathway that a human passes through, from at least one of both sides of the pathway, and diffusely reflects a sub-terahertz wave; a first light source which emits a sub-terahertz wave onto the reflector; and a first detector which receives a reflected wave of the sub-terahertz wave emitted from the first light source, diffusely reflected by the reflector, and reflected by the human, and generates an image based on the reflected wave received. The first light source and the first detector are located at a first direction side relative to a center of the imaging space in a direction in which the pathway extends.

An ultra-wideband-based object identification method and system includes: transmitting, using a transmitter, an ultra wideband signal to an object; receiving, using a receiver, a reflected signal from the object; and determining, using a processor, an identity of the object based on the received reflected signal.

Apparatus and method configured to determine locations of man-made objects within synthetic aperture radar (SAR) imagery. The apparatus and method prescreen SAR imagery to identify potential locations of man-made objects within SAR imagery. The potential locations are processed using a change detector to remove locations of natural objects to produce a target image containing location of substantially only man-made objects.

The present invention provides a processing system (20) including an image capturing unit (21) that captures an image of a person passing through a first area and generates a person image indicating an appearance of the person, an electromagnetic wave transmission/reception unit (22) that emits an electromagnetic wave having a wavelength of 30 micrometers or more and 1 meter or less toward the person passing through the first area, and receives a reflected wave, a determination unit (23) that determines whether the person possesses a pre-designated object, based on a signal of the received reflected wave, and a registration unit (24) that registers, in a first list, the person image of the person determined to possess the pre-designated object.

In an example, information related to a user of a mobile device and to an item associated with the user is received from a network. Based on the information a screening threshold is determined. The screening threshold is communicated to an electronic physical screening device and a direction instruction, indicating a location of a physical screening area corresponding to the electronic physical screening device, is communicated to the mobile device. The direction instruction causes the mobile device to display a direction information, directing the user to the physical screening area, for a physical screening in accordance with the threshold.

Systems and methods for performing body scans to ascertain body measurements of a subject. A radar based scanner may be used to generate a three dimensional image of a subject as a point cloud map of electromagnetic radiation reflected from a target region. The point cloud may be mapped to a parametric model of a standard human shape. The mapping may be optimized by adjusting parameters of the parametric model. The resulting parameters of the optimized model may be used to indicate the body measurements of the scanned subject

An oscillator includes a substrate, and a plurality of oscillation structures and a power feed structure. The power feed structure includes a power source and a bias supply unit, the oscillation structures each include one antenna and an N piece of a semiconductor element electrically connected to the antenna. The semiconductor elements exhibit negative resistance characteristics when driven by the power feed structure, and out of the N piece thereof, a P piece thereof are connected in parallel, and an S piece thereof are connected in series, an F piece thereof are supplied with bias in the forward direction, and an R piece thereof are supplied with bias in a reverse direction. The semiconductor element in one of the oscillation structures exhibits asymmetrical current-voltage properties between forward bias and reverse bias. At least one of the N, P, S, F, and R differs from another.

A system comprises a personal device such as one used by law enforcement, and a housing containing a portable radar system with both a ranging resolution and lateral resolution sufficient to detect an object concealed on a person (e.g., one that operates in the THz range), where the housing is configured to be mounted in contact with the personal device such that when mounted, the combined handheld device and housing have a form factor that allows it to retain its characteristic as a personal device, and where the portable radar system is configured to, when in operation, emit a radar beam and to receive a reflection of the emitted radar beam.