Two metamaterial (MTM) microstrip patch antenna (MSPA) is presented in this paper. Herein two Reactive impedance surface (RIS) unit cells are studied and designed. The RIS unit cells are loaded with omega (O-RIS) and complementary omega (CO-RIS) shapes. Subsequently the unit cells are incorporated in the MSPA and observed the miniaturization. The antenna is designed at C-Band. The O-RIS MSPA resonant at 5.4GHz with directive gain of 6.02dBi whereas the CO-RIS MSPA resonant at 4.5GHz with directive gain of 5.79dBi. © 2015 IEEE.