This paper presents a preliminary experiment for evaluating the channel capacity of a 2 × 2 polarization-controlled MIMO antenna that takes the variation of the radio wave propagation environment and the antenna inclination angle into consideration simultaneously. Firstly, the radiation pattern of a 2 × 2 polarization-controlled MIMO antenna was measured in an anechoic chamber. Then, the MIMO channel capacity measurement has been carried out under different use scenarios using an OTA apparatus. From an agreement between the measured data and analytical results, the effectiveness of the proposed antenna was confirmed.