Abstract: The disclosed radar system may include a radar mechanism comprising a transmitter and at least one receiver. The radar system may also include a signal generator that generates a frequency-modulated radar signal. In addition, the radar system may include at least one frequency multiplier that, after multiplying a frequency of the frequency-modulated radar signal by a certain factor, synchronously passes the frequency-modulated radar signal to (1) the transmitter to be transmitted to at least one transponder located on a wearable device and (2) a processing device communicatively coupled to the receiver. The processing device may (1) detect a signal returned to the receiver from the transponder in response to the frequency-modulated radar signal and (2) calculate a distance between the transponder and the receiver based at least in part on an analysis of the signal returned from the transponder and the frequency-modulated radar signal received from the frequency multiplier.

Abstract: A system (100) for storing, identifying and localizing supports (20, 21) for tissue samples embedded in paraffin, comprising—a plurality of supports (20, 21), wherein each one is provided with a respective RFID tag (201), said supports (20, 21) being each a histology cassette (20) configured to contain a tissue sample embedded in paraffin, or a slide (21); —a plurality of trays (1), wherein each tray (1) is provided with a respective RFID tag (101), and is configured to contain a plurality of said supports (20, 21), ach tray (1) being provided with a plurality of seats (11), each seat (11) being configured to receive a respective support (20, 21) and each support (20, 21) being adapted to be arranged at a respective seat (11); —at least one component (3) provided with a plurality of RFID antennas (10, 31), said plurality of RFID antennas (10, 31) comprising an RFID antenna (10) for reading the RFID tag (101) of a tray (1) of said plurality of trays, and RFID antennas (31) for reading the RFID tags (201) of th

Abstract: 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.

Abstract: The disclosed apparatus may include at least one transponder that (1) is located on a wearable device worn by a user and (2) retransmits signals received at the transponder after shifting frequencies of the received signals to a certain frequency range. The apparatus may also include at least one radar device that (1) transmits a frequency-modulated radar signal to the transponder and (2) receives signals whose frequencies are within the certain frequency range. In addition, the apparatus may include a processing device that (1) detects a signal returned to the radar device from the transponder, (2) calculates, based on the returned signal, a distance between the transponder and the radar device, and then (3) determines, based on the distance between the transponder and the radar device, a current physical location of at least a portion of the user. Various other apparatuses, systems, and methods are also disclosed.

Abstract: A radar system may include (1) a wearable device, (2) a set of radar devices secured to the wearable device, wherein the set of radar devices (A) transmit radar signals to at least one transponder and (B) receive the radar signals, (3) an error-mitigation device secured to the wearable device, wherein the error-mitigation device provides data for mitigating position errors in triangulation calculations involving the radar signals, and (4) at least one processing device communicatively coupled to the set of radar devices and the error-mitigation device, wherein the processing device (A) calculates, based at least in part on roundtrip flight times of the radar signals and the data, distances between the set of radar devices and the transponder and (B) triangulates, based at least in part on the distances, a three-dimensional location of the transponder relative to the wearable device. Various other apparatuses, systems, and methods are also disclosed.

Abstract: An example device may include a transmitter, such as a radio-frequency (RF) transmitter, a receiver and a controller. The receiver may include a mixer that generates a beat signal from a received signal and a local oscillator signal. A transmitted signal may include a linear frequency ramp and may be incident on an object, inducing the received signal. The device may include a controller configured to detect a frequency and phase of the beat signal. The device may determine an absolute distance to the object using the beat frequency and a distance component using the beat signal phase. The distance component may be used to increase the precision of an object distance measurement relative to the absolute distance alone. The distance component may be used to detect relatively small movements of the object, such as micron-scale movements. Various other methods, systems and computer-readable media are also disclosed.

Abstract: The disclosed radar system may include a radar mechanism comprising a transmitter and at least one receiver. The radar system may also include a signal generator that generates a frequency-modulated radar signal. In addition, the radar system may include a delay mechanism that (1) receives the frequency-modulated radar signal from the signal generator and (2) after a certain period of delay, passes the frequency-modulated radar signal to the transmitter to be transmitted to a transponder located on a wearable artificial reality device. The radar system may also include a processing device that (1) receives the frequency-modulated radar signal from the signal generator, (2) detects a signal returned to the receiver from the transponder, and (3) calculates a distance between the transponder and the receiver based at least in part on an analysis of the signal returned from the transponder and the frequency-modulated radar signal received from the signal generator.

Abstract: A radar system may include a wearable device dimensioned to be worn by a user of an artificial reality system. The radar system may also include at least one radar device that is secured to the wearable device and transmits at least one frequency-modulated radar signal to at least one transponder located within a physical environment of the user. The radar system may further include at least one processing device communicatively coupled to the radar device. The processing device may detect a signal returned to the radar device from the transponder in response to the frequency-modulated radar signal and then calculate, based at least in part on a frequency of the returned signal, a distance between the transponder and the radar device. Various other devices, systems, and methods are also disclosed.

Abstract: The disclosed computer-implemented method may include transmitting, by at least one radar device, a frequency-modulated radar signal to at least one transponder located within a physical environment surrounding a user, detecting, by a processing device communicatively coupled to the at least one radar device a signal returned to the at least one radar device from the at least one transponder in response to the frequency-modulated radar signal, determining a beat frequency of the returned signal by performing a zero-crossing analysis of the returned signal in the time domain, and calculating, based at least in part on the beat frequency of the returned signal, 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.

Abstract: The disclosed apparatus may include at least one radar device that transmits a frequency-modulated radar signal to a plurality of transponders located on a wearable device worn by a user. The apparatus may also include a processing device that (1) directs at least one of the plurality of transponders to be in an active state that enables the transponder to receive and transmit signals, (2) detects, while the transponder is in the active state, a signal returned to the radar device from the transponder in response to the frequency-modulated radar signal, (3) calculates, based at least in part on the returned signal, a distance between the transponder and the radar device, and (4) determines, based at least in part on the distance between the transponder and the radar device, a current physical location of at least a portion of the user. Various other apparatuses, systems, and methods are also disclosed.

Abstract: A system includes a locatable glove and a pose determination device. The locatable glove includes a glove body worn over a hand of a user, and a plurality of positioning transponders. The positioning transponders are coupled to the glove body at various positions on the glove body, and each re-radiates a received signal, the re-radiated signal unique to the positioning transponder. The pose determination device includes a plurality of antennas and a controller. The antennas are each configured to receive the unique signals re-radiated by the positioning transponders. The antennas are physically separated from each other. The controller is communicatively coupled to the plurality of antennas, and is configured to determine, for each of the received unique signals, a location of the position on the locatable glove of the positioning transponder corresponding to the unique signal.

Abstract: A system includes a locatable glove and a pose determination device. The locatable glove includes a glove body worn over a hand of a user, and a plurality of positioning transponders. The positioning transponders are coupled to the glove body at various positions on the glove body, and each re-radiates a received signal, the re-radiated signal unique to the positioning transponder. The pose determination device includes a plurality of antennas and a controller. The antennas are each configured to receive the unique signals re-radiated by the positioning transponders. The antennas are physically separated from each other. The controller is communicatively coupled to the plurality of antennas, and is configured to determine, for each of the received unique signals, a location of the position on the locatable glove of the positioning transponder corresponding to the unique signal.