According to examples, an apparatus for identifying an angle of arrival of RF signals from an RF emitter may include a chassis, an antenna array spacer, and a first RF antenna and a second RF antenna connected to the antenna array spacer. The first RF antenna and the second RF antenna may movable along the antenna array spacer. In addition, the apparatus may include an antenna controller to output combined signals received by the first RF antenna and the second RF antenna and adjust phases of the RF signals received by the first RF antenna and the second RF antenna. The apparatus may further include an interface controller to output the combined signals to a test device having a display, in which the test device may include a processor to determine an angle of arrival of the combined signals.

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.

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.