Patent ID: 8730112

Claim:
A multi-input multi-output (MIMO) antenna evaluation apparatus comprising a receiving antenna to be evaluated and a plurality of scatterer antennas surrounding the receiving antenna, the MIMO antenna evaluation apparatus comprising: a plurality of signal generators each generating a radio frequency signal corresponding to one of substreams transmitted using a MIMO communication scheme; delay circuits for respectively adding delay times independent from each other to the respective generated radio frequency signals, and outputting resulting radio frequency signals; a divider for dividing each of the radio frequency signals outputted from the delay circuits; a first radio frequency circuit for adjusting phases and amplitudes of the respective divided radio frequency signals; and a controller for controlling the delay circuits to add the delay times to the respective generated radio frequency signals, and controlling the first radio frequency circuit to change the phases and amplitudes of the respective divided radio frequency signals to produce a first fading, the first fading including a Doppler shift due to a virtual movement of the receiving antenna, wherein, with respect to each of the radio frequency signals generated by the signal generators, the MIMO antenna evaluation apparatus radiates the radio frequency signals whose phases and amplitudes are adjusted by the first radio frequency circuit, from the scatterer antennas, thereby creating multipath waves including delay and the first fading around the receiving antenna.