The present invention relates to an active antenna system. The system has a plurality of antennas (2) and a radio equipment (3) connected to the antennas (2) and being located adjacent to the antennas (2). This radio equipment (3) comprises for each antenna (2) a separate transceiver module (12).

A radio beacon system configured to assist autonomous flight of one or more unmanned aerial vehicles (UAVs), wherein the radio beacon system comprises: —a drone device (200), configured to be installed on an UAV and including a radio transceiver, and —a radio beacon device (100), configured to be installed on ground and including N antenna arrays (110, 120) with N≥2, one or more radio transceivers configured to communicate with the radio transceiver of the drone device (200), and at least one processing unit (130), wherein each antenna array (110, 120) has M antenna elements (115, 125) with M≥2 associated to respective beamforming electronic weights w(n, m), with n ranging from 1 to N and m ranging from 1 to M, wherein said at least one processing unit (130) is configured to perform an adaptive beamforming method for assisting autonomous flight of the UAV.

A platform that automates providing wireless communication between one or more of a plurality of antennas and a moving vehicle that is traveling along a path. One or more of the plurality of antennas are employed to detect wireless signals communicated by the vehicle and/or wireless devices for the vehicle's passengers. In one or more embodiments, characteristics of the detected wireless signals and the plurality of antennas is employed to select an antenna to provide wireless communication with the vehicle and/or wireless devices for the vehicle's passengers at a current location on the path.

A system for positioning a vehicle at a charging station. The system comprises: a wireless communication arrangement comprising a first communication device configured to wirelessly communicate with a second communication device by a wireless protocol; a vehicle positioning arrangement comprising a transmitting antenna configured to transmit a detection signal, and a receiving antenna configured to receive the detection signal. The transmission of the detection signal by the transmitting antenna and/or the detection of the detection signal by the receiving antenna is controlled to determine an angle between the transmitting antenna and the receiving antenna, which angle is used to guide the vehicle to a predetermined position at the charging station. The first communication device comprises one of the transmitting antenna and receiving antenna of the vehicle positioning arrangement.

A phased array antenna device for receiving a signal from a satellite includes subarrays including antenna elements and phase shifters that shift phases of signals received by the antenna elements with set phase shift values, a demodulator that demodulates the signals from the satellite with the phases shifted by the phase shifters and outputs the demodulated signals, and a controller that sets the phase shift values of the phase shifters and controls a beam direction. The controller calculates, for each of the subarrays, a direction-correction phase shift value that maximizes a power value of the signal from the satellite by being added to the phase shift values of the phase shifters included in the subarray and adds the direction-correction phase shift value to the phase shift values of the phase shifters included in the subarray.

A signal divider includes: a dividing circuit arranged to generate an output oscillating signal according to a first input oscillating signal; and a signal generating circuit, coupled to the dividing circuit, for generating an injection signal to the dividing circuit. The dividing circuit is arranged to generate the output oscillating signal with a predetermined phase according to the injection signal and the first input oscillating signal.

Disclosed is an electronic device including a plurality of antennas, and a control circuit configured to identify a two-dimensional coordinate value using signals received through the plurality of antennas and correct a signal reception angle based on the two-dimensional coordinate value, or to selectively filter data received from a signal source.

Provided are computer-implemented methods that include receiving one or more messages from a device in a transmit state, including: a first message received at a first power level, the first message including data associated with a power level at which the first message was transmitted by the device in the transmit state, and a second message received at a second power level, the second message including data associated with a power level at which the second message was transmitted by the device in the transmit state; and determining a heading toward the device in the transmit state based on the first message and the second message. In some non-limiting embodiments or aspects, the method may include outputting data associated with an indication of the heading toward the device in the transmit state. Systems and computer program products are also provided.

A vehicle includes a millimeter wave (mmWave) antenna, including a millimeter wave (mmWave) antenna, including a plurality of light elements and a plurality of active antenna elements in a predefined configuration surrounding a lensless camera element. The vehicle further includes an antenna controller configured to receive an image of a second mmWave antenna of a second vehicle via the lensless camera of the mmWave antenna, identify a scale and angle of rotation between the mmWave antenna and the second mmWave antenna based on the image, compute phase angles for the active antenna elements of the mmWave antenna according to the scale and angle of rotation, and transmit data using the active antenna elements to the second vehicle, according to the computed phase angles, to form a beam targeted at the second mmWave antenna of the second vehicle.

A technology is described for direction finding. An example of the technology can include executing stages of an N stage search for a direction finding estimate of a plane wave X. The stages of the N stage search include searching a search space in a calibration set having a plurality of points in space and calculating a direction finding estimate, wherein a first search space is a coarse set of points in space and subsequent search spaces selected for subsequent stages of the N stage search are increasingly finer sets of points in the space, and a solution for the direction finding estimate output by a stage of the N stage search is used to select a next search space for a next stage of the N stage search. A direction finding estimate output by a final stage of the N stage search is the final direction finding estimate.