  Reconfigurable Intelligent Surfaces (RIS) are known as a promising technology
to improve the performance of wireless communication networks, and have been
extensively studied. Movable Antennas (MA) are a novel technology that fully
exploits the antenna placement for enhancing the system performance. This
article aims at evaluating the impact of transmit power and number of antenna
elements on the outage probability performance of an MA-enabled RIS structure
(MA-RIS), compared to existing Fixed-Position Antenna RIS (FPA-RIS). The change
in geometry caused by the movement of antennas and its implications for the
effective number of illuminated elements, are studied for 1D and 2D array
structures. Our numerical results confirm the performance advantage provided by
MA-RIS, achieving 24\% improvement in outage probability, and 2 dB gain in
Signal-to-Noise Ratio (SNR), as compared to FPA-RIS.
