Provided are a device and a method for estimating an angle of arrival (AoA) and an angle of departure (AoD) in a communication system having 1-bit quantization.

An angle processing method includes: sending an angle measurement capability request message to a second terminal; receiving a response message carrying angle measurement capability information of the second terminal fed back by the second terminal.

A platform provides precise thermal regulation of cryogenic electronic circuits. The platform includes a cold distribution plate, cold blades, heaters, and a thermal regulator. The cold distribution plate couples to a cryogenic cooler for cooling the cold distribution plate. The cold blades contact and extend from a periphery of the cold distribution plate. The cold blades support and cool the cryogenic electronic circuits, which include a respective cryogenic electronic circuit disposed on each of the cold blades. The heaters heat the cold blades, with the heaters including a respective heater disposed at each of the cold blades. The thermal regulator controls the heaters to maintain a predetermined temperature at each of the cryogenic electronic circuits.

The technology described herein is directed towards a reconfigurable intelligent surface that receives and redirects incoming electromagnetic signals based on power efficient subarrays of unit cells. Each subarray integrates a power amplifier and tunable delay device to selectively amplify and delay the reflected signal. For example, the power amplifier and tunable delay device is shared by a m n (e.g., 3 3) subarray of unit cells, which can be arranged as a module of a larger reconfigurable intelligent surface. Proper impedance matching between the power amplifier and the reconfigurable intelligent surface elements is maintained by using a matching circuit to minimize signal reflection. The system design thus provides a device for receiving and reflecting the electromagnetic signal in the same polarization by coupling the RF energy, processing, amplifying, and adding delay to mitigate any interference. The technology facilitates estimation of the angle of arrival of the incoming signal.

An apparatus configured to: receive an input dataset indicative of the amplitude and phase of radar signals received at a plurality of antenna elements; determine an objective function; determine a beam forming spectrum, the beam forming spectrum comprising a correlation of the input dataset with a set of beamsteering vectors; perform a first determination process for evaluation of the objective function comprising the processor being configured to: identify two or more peaks in the beam forming spectrum based on a predetermined threshold level, determine candidate direction-of-arrival angles therefrom for definition of a first-reduced search space; perform a second determination process for evaluation of the objective function comprising the processor being configured to: determine a peak direction-of-arrival angle comprising the direction-of-arrival angle that corresponds to a peak in the beam forming spectrum: evaluate the objective function over the first reduced search space and using the peak direction-of-arrival angle.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The present disclosure provides a dual mode antenna, comprising: a first conductive piece; and a second conductive piece, configured to electromagnetically couple with the first conductive piece through a dielectric at a second frequency to operate as a loop antenna with the first conductive piece and configured to operate independently of the first conductive piece at a first frequency to operate as a monopole antenna. The dual mode antenna can be included in an antenna array as one of a plurality of dual mode antennas coupled to a routing substrate or a reference dual mode antenna coupled to the routing substrate along with a plurality of single mode antennas coupled to the routing substrate; wherein each antenna of the plurality of dual mode antennas, the reference dual mode antenna, and the plurality of single mode antennas is arranged evenly relative to a first neighboring antenna and a second neighboring antenna.

A method for determining an angel includes: sending a control message to a target device on a first channel. The control message carries at least channel switch information configured to instruct the target device to transmit signals on a second channel. The method further includes determining an angle from the target device to the terminal according to a first signal and a second signal. The first signal transmitted by the target device is received on the first channel. The second signal transmitted by the target device is received on the second channel.

A method for determining an angel includes: sending a control message to a target device on a first channel. The control message carries at least channel switch information configured to instruct the target device to transmit signals on a second channel. The method further includes determining an angle from the target device to the terminal according to a first signal and a second signal. The first signal transmitted by the target device is received on the first channel. The second signal transmitted by the target device is received on the second channel.

Systems and methods for automated unmanned aerial vehicle recognition. A multiplicity of receivers captures RF data and transmits the RF data to at least one node device. The at least one node device comprises a signal processing engine, a detection engine, a classification engine, and a direction finding engine. The at least one node device is configured with an artificial intelligence algorithm. The detection engine and classification engine are trained to detect and classify signals from unmanned vehicles and their controllers based on processed data from the signal processing engine. The direction finding engine is operable to provide lines of bearing for detected unmanned vehicles.