Abstract: An example method of estimating the angular resolution of antenna array comprises: receiving a plurality of values of magnitude and phase of a radio frequency (RF) signal for each antenna element of a plurality of antenna elements comprised by an antenna array; performing, by a machine learning model, a feature extraction operation to transform the plurality of values of magnitude and phase into a plurality of data points in a reduced-dimension space; clustering, by the machine learning model, the plurality of data points into a plurality of clusters; and computing, based on the clustered data points, an angular resolution value for the antenna array.

Abstract: A system and method reconfiguring an antenna for reducing and/or eliminating the effects of multipath on a phase-based measurement system. The method includes steering an antenna unit into a first direction to cause the antenna unit to generate a first constant tone (CT) signal based on a plurality of multipath signals. The method includes performing a phase measurement on the first CT signal to generate a first phase measurement value. The method includes steering the antenna unit into a second direction to cause the antenna unit to generate a second CT signal based on the plurality of multipath signals. The method includes performing a phase measurement on the second CT signal to generate a second phase measurement value. The method includes determining a change in multipath interference at the antenna unit among the plurality of multipath signals. The method includes re-steering the antenna unit into the first direction.

Abstract: A system and method reconfiguring an antenna for reducing and/or eliminating the effects of multipath on a phase-based measurement system. The method includes steering an antenna unit into a first direction to cause the antenna unit to generate a first constant tone (CT) signal based on a plurality of multipath signals. The method includes performing a phase measurement on the first CT signal to generate a first phase measurement value. The method includes steering the antenna unit into a second direction to cause the antenna unit to generate a second CT signal based on the plurality of multipath signals. The method includes performing a phase measurement on the second CT signal to generate a second phase measurement value. The method includes determining a change in multipath interference at the antenna unit among the plurality of multipath signals. The method includes re-steering the antenna unit into the first direction.

Abstract: A system and method reconfiguring an antenna for reducing and/or eliminating the effects of multipath on a phase-based measurement system. The method includes steering an antenna unit into a first direction to cause the antenna unit to generate a first constant tone (CT) signal based on a plurality of multipath signals. The method includes performing a phase measurement on the first CT signal to generate a first phase measurement value. The method includes steering the antenna unit into a second direction to cause the antenna unit to generate a second CT signal based on the plurality of multipath signals. The method includes performing a phase measurement on the second CT signal to generate a second phase measurement value. The method includes determining a change in multipath interference at the antenna unit among the plurality of multipath signals. The method includes re-steering the antenna unit into the first direction.

Abstract: An example method of estimating the angular resolution of antenna array comprises: receiving a plurality of values of magnitude and phase of a radio frequency (RF) signal for each antenna element of a plurality of antenna elements comprised by an antenna array; performing, by a machine learning model, a feature extraction operation to transform the plurality of values of magnitude and phase into a plurality of data points in a reduced-dimension space; clustering, by the machine learning model, the plurality of data points into a plurality of clusters; and computing, based on the clustered data points, an angular resolution value for the antenna array.

Abstract: Implementations disclosed describe devices and systems for close-range communications in high-density wireless network environments. A close-range antenna configured according to disclosed implementations generates a sufficiently strong near-field signal to ensure a reliable close-range communication. Additionally, the signal decreases significantly with the distance from the antenna and, therefore, contributes little in the way of interference and noise for other devices of the wireless environment. Various antenna systems that achieve this objective are disclosed.

Abstract: An example method of estimating the angular resolution of antenna array comprises: receiving a plurality of values of magnitude and phase of a radio frequency (RF) signal for each antenna element of a plurality of antenna elements comprised by an antenna array; performing, by a machine learning model, a feature extraction operation to transform the plurality of values of magnitude and phase into a plurality of data points in a reduced-dimension space; clustering, by the machine learning model, the plurality of data points into a plurality of clusters; and computing, based on the clustered data points, an angular resolution value for the antenna array.

Abstract: An example method of estimating the angular resolution of antenna array comprises: receiving a plurality of values of magnitude and phase of a radio frequency (RF) signal for each antenna element of a plurality of antenna elements comprised by an antenna array; performing, by a machine learning model, a feature extraction operation to transform the plurality of values of magnitude and phase into a plurality of data points in a reduced-dimension space; clustering, by the machine learning model, the plurality of data points into a plurality of clusters; and computing, based on the clustered data points, an angular resolution value for the antenna array.

Abstract: A system includes a charging station and one or more receiving devices receiving wireless power from the charging station. The charging station includes an orientation adaptable antenna (OAA). The OAA may generate a magnetic field component parallel to the plane of the OAA to charge devices oriented at 90 degrees with respect to the OAA. The OAA may generate a magnetic field along different directions within the plane parallel to the OAA. The OAA may be able to adjust the direction of the field to couple to devices with antennas in different orientations. The OAA may further produce a magnetic field normal to the plane of the OAA. The OAA may adjust the relative strengths the various directional components of the magnetic field to align the field normal to the antennas of the receiving devices in up to three dimensions, simultaneously charge receiving devices in different orientations, or both.

Abstract: A system includes a charging station and one or more receiving devices receiving wireless power from the charging station. The charging station includes an orientation adaptable antenna (OAA). The OAA may generate a magnetic field component parallel to the plane of the OAA to charge devices oriented at 90 degrees with respect to the OAA. The OAA may generate a magnetic field along different directions within the plane parallel to the OAA. The OAA may be able to adjust the direction of the field to couple to devices with antennas in different orientations. The OAA may further produce a magnetic field normal to the plane of the OAA. The OAA may adjust the relative strengths the various directional components of the magnetic field to align the field normal to the antennas of the receiving devices in up to three dimensions, simultaneously charge receiving devices in different orientations, or both.

Abstract: A system includes a charging station and one or more receiving devices receiving wireless power from the charging station. The charging station includes an orientation adaptable antenna (OAA). The OAA may generate a magnetic field component parallel to the plane of the OAA to charge devices oriented at 90 degrees with respect to the OAA. The OAA may generate a magnetic field along different directions within the plane parallel to the OAA. The OAA may be able to adjust the direction of the field to couple to devices with antennas in different orientations. The OAA may further produce a magnetic field normal to the plane of the OAA. The OAA may adjust the relative strengths the various directional components of the magnetic field to align the field normal to the antennas of the receiving devices in up to three dimensions, simultaneously charge receiving devices in different orientations, or both.

Abstract: A system includes a charging station and one or more receiving devices receiving wireless power from the charging station. The charging station includes an orientation adaptable antenna (OAA). The OAA may generate a magnetic field component parallel to the plane of the OAA to charge devices oriented at 90 degrees with respect to the OAA. The OAA may generate a magnetic field along different directions within the plane parallel to the OAA. The OAA may be able to adjust the direction of the field to couple to devices with antennas in different orientations. The OAA may further produce a magnetic field normal to the plane of the OAA. The OAA may adjust the relative strengths the various directional components of the magnetic field to align the field normal to the antennas of the receiving devices in up to three dimensions, simultaneously charge receiving devices in different orientations, or both.

Abstract: An antenna system for a reader configured to interact with RFID tags includes one or more antenna elements electrically coupled to the reader for transmission and reception of RFID signals. In one embodiment the antenna elements include a conductive plate, a first elongate aperture in the plate oriented longitudinally in a first direction, a second elongate aperture in the plate oriented longitudinally in the first direction so as to be generally parallel with the first elongate aperture, a third elongate aperture in the plate oriented longitudinally in a second direction generally perpendicular to the first direction and configured to join the first and second apertures at about the longitudinal middle of the first aperture. Both “h”-shaped and “H”-shaped versions are provided. In another embodiment the antenna element comprises a rectangular slot.