Abstract: A MIMO channel simulator for simulating the effects that a transmission channel has on at least two signals transmitted by at least two transmitting antennas that are received by at least two receiving antennas is disclosed. The simulator includes at least two input ports for connecting to the transmitting antennas to receive the two signals therefrom as two input signals to the channel simulator, and at least two output ports for connecting to the receiving antennas to send two output signals thereto. The simulator further includes at least two combiner/divider stages, in cascade in signal paths between the input and output ports. The combiner/divider stages generate the two output signals from the two input signals. Each output signal is a combination of the input signals and has a phase that is different than that of the other at least one output signal.