An electronic device is provided. The electronic device includes a housing including a first housing and a second housing, a flexible display, at least one contact structure, a first processor, and a first ultrawide band (UWB) antenna, a second UWB antenna, a third UWB antenna, and a fourth UWB antenna, and, in a first state, the first processor may transmit and/or receive a signal of a designated frequency band, based on at least two of the first UWB antenna and the second UWB antenna, and the third UWB antenna, and, in a second state, the first processor may transmit and/or receive a signal of a designated frequency band, based on at least two of the first UWB antenna and the second UWB antenna, and the fourth UWB antenna which is disposed in the flexible display.

Contactless operation of a medical device, such as a hemodialysis (HD) or peritoneal dialysis (PD) device, is provided via a mobile pointing apparatus and a receiving arrangement associated with the medical device. The mobile pointing apparatus includes a signal emitter for emitting an optical or electromagnetic signal, and the receiving arrangement associated with the medical device determines a pointing target of the mobile pointing apparatus relative to the medical device based on the signal emitted by the mobile pointing apparatus and triggers a function of the device based on the pointing target of the mobile pointing apparatus.

Provided is a measurement device including: a reception strength measurement unit configured to measure reception strengths of radio signals which have difference frequencies and which are transmitted from a plurality of transmission devices; and a recording unit configured to sequentially record the reception strengths for the plurality of transmission devices.

The disclosed computer-implemented method may include transmitting, by at least one radar device, to at least one transponder located within a physical environment surrounding a user, a frequency-modulated radar signal that has a first type of polarization, and receiving, by the at least one radar device, signals that have a second type of polarization, the second type of polarization being different than the first type of polarization, detecting, by a processing device communicatively coupled to the at least one radar device, a signal that has the second type of polarization and was returned to the at least one radar device from the at least one transponder in response to the frequency-modulated radar signal, and calculating, by the processing device, a distance between the at least one transponder and the at least one radar device. Various other methods, systems, and computer-readable media are also disclosed.

A state detection system includes a sensor (10) that includes an electromagnetic wave reflecting material (13) and a resonator (11) disposed adjacent to or integrally with the electromagnetic wave reflecting material (13), and that detects a state change of a surrounding object or surrounding environment as a change in its own electromagnetic wave reflection characteristic, a reader (20) that transmits an electromagnetic wave to the sensor (10), that receives a reflected wave of the electromagnetic wave, and that acquires reflected wave spectrum information of the sensor (10), and an analysis device (30) that estimates a current state of a detection target of the sensor (10) by applying information regarding reflected wave intensities at a plurality of frequency positions of the reflected wave spectrum to a learning model (30D) generated in advance on a basis of training data of a reflected wave spectrum for each state of the sensor (10).

Methods, systems, and apparatus, including medium-encoded computer program products, for 3D flight tracking of objects include a method including determining a golf ball trajectory based on observations by sensor(s), extrapolating the trajectory backward in time, calculating distance measure(s) between the extrapolated trajectory and physical locations, estimating a systemic error for observation(s), wherein the systemic error affects observed ball positions, estimating a stochastic error associated with the observation(s), wherein the stochastic error affects an angle of a trajectory determined from observed ball positions, combining the estimated systemic and stochastic errors to form error measure(s) for the distance measure(s), identifying one of the physical locations as an origin for the golf ball when the error measure(s) satisfy a criterion, and waiting for additional observations of the golf ball by the sensor(s) when the error measure(s) do not satisfy the criterion.

An access control device of a vehicle is configured to detect the spatial position of the access element of the vehicle safety unit relative to the vehicle via electromagnetically detecting the distances and angles between several low-frequency transmitting antennas of the vehicle safety unit and the low-frequency receiver of the access element. The access control device is also configured to detect the location position of an external induction charging unit relative to the vehicle via electromagnetically measuring the distance and angle between at least two transmitting antennas of several low-frequency transmitting antennas and at least one receiving antenna of the induction charging unit.

A system and method are provided for detecting direction of movement. The system includes at least two radio frequency identification (RFID) readers arranged in different locations. The RFID readers transmit respective location signals from their locations and receive corresponding response signals from a portable electronic device (PED) when the PED is within range to receive the corresponding location signals, respectively. The system includes a controller configured to determine whether the individual response signals received by the RFID readers respectively satisfy a predetermined condition at a first time and a second time subsequent to the first time. The controller is also configured to determine a direction of movement of the portable electronic device relative to the locations of the RFID readers during the first and second times based on whether the response signals respectively satisfy the predetermined condition at the first and second times.

An RFID tag reading system and method accurately and rapidly determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area to each tag, by steering a primary receive beam at a primary steering angle from each tag, by steering a plurality of secondary receive beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to determine a true bearing for each tag. Bidirectional communication between the reader and a tag is conducted over a single inventory round in which the tag is read a plurality of times by the primary and the secondary receive beams.

Transponder transmissions may be monitored through a direct, shielded connection of an RF coupler to a transponder antenna cable. The transponder interrogated pressure altitude may quickly change and measuring accurate data including position and pressure altitude is critical. A global positioning system (GPS) may be onboard a universal access transceiver (UAT) and may be utilized to correct the transponder interrogated pressure altitude and position. The UAT may transmit data that may include a corrected pressure altitude and a subsequent position to improve air traffic control radar beacon systems (ATCRBS).