MIMO is a radio technique that satisfies growing data rate needs. To evaluate the benefits and drawbacks of MIMO radio using different antennas in an aircraft environment, an experimental MIMO system is applied in such an environment with two different antenna types. On the one hand omnidirectional antennas, on the other hand leaky coaxial cables are used. MIMO transmissions are conducted in the cabin of the aircraft and the results are presented. The estimated impulse and frequency responses are discussed. Channel capacities are determined. Impulse and frequency responses are measured using a MIMO OFDM scheme, which is reviewed. The MIMO configuration with four omnidirectional receive antennas and three omnidirectional transmit antennas outperforms the other configurations.