Viavi Solutions Inc.

Aeroflex International Limited

Viavi Solutions UK Limited

Adrian Jones

David P Owen

Charalampos Kalatzis

A multi-panel base station test system includes a base station radio unit configured with a plurality of antenna panels positioned at a first end of a test chamber of the multi-panel base station test system. The multi-panel base station test system includes a plurality of test antennas positioned at a second end of the test chamber opposing the first end. The multi-panel base station test system includes a microwave lens positioned between the plurality of antenna panels and the plurality of test antennas in the test chamber. The microwave lens is configured to focus respective beams transmitted from each of the plurality of antenna panels toward respective focal points associated with each of the plurality of test antennas based on steering of the plurality of antenna panels.

Multi-panel base station test system

A system for testing wireless communication equipment which includes a beamforming antenna, the system comprising: a probe for coupling an antenna element of the beamforming antenna of the wireless communication equipment to be tested to a test and measurement unit; and a lid configured to cover the beamforming antenna, wherein the lid is provided with a port for receiving the probe, such that the probe couples to the antenna element.

System for testing wireless communication equipment employing antennas

A base station testing system may receive one or more input signals originating from one or more transceivers of a base station. The base station testing system may form, based on the one or more input signals, one or more output signals associated with a beam direction. The base station testing system may provide a feedback signal, that is based on the one or more output signals, to a calibration component of the base station.

Testing of a base station with beamforming capability

A low noise sinusoidal signal at a desired output frequency is synchronised using a first variable frequency oscillator () and providing a feedback control loop around the first oscillator () to generate a feedback control signal in successive frequ comparison steps using second and third frequency reference signals (). Each of the second and third frequency reference signals are derived from a first frequency reference signal, the second frequency reference signal () being compared with the output frequency of the first oscillator () to generate a frequency difference signal (), and said frequency difference signal ( being compared in frequency with the third frequency reference signal () to generate said feedback control signal for the first oscillator (), the frequency of the third frequency reference signal () being equal to the difference of the frequency of the se frequency reference signal () and the desired output frequency. The second and third frequency reference signals () are generated by respective second and third frequency reference sources, the second frequency reference source comprising a second variable frequency oscillator () the frequency of which is maintained in a limited range around its optimum natural frequency to give optimum performance in producing a low noise output from the first oscillator ().

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Letchworth, United Kingdom

Adrian Jones