A measuring device comprising a plurality of analog signal adjusters, and an antenna array, comprising a plurality of antennas is provided. Each of the plurality of antennas is connected to exactly one of the plurality of analog signal adjusters. The analog signal adjusters are adapted to alter the phase and/or amplitude of signals sent and/or received by the plurality of antennas, generating an antenna characteristic of the antenna array comprising at least a first beamforming beam or a first plane wave and a second beamforming beam or a second plane wave.