Aim: The aim of this work is to reduce the mutual coupling by incorporating Hexagonal Complementary Split Ring Resonator (CSRR) into metamaterial structures in the novel two element antenna array. Mutual coupling values are measured for different frequencies and the values are compared with an antenna array without metamaterial structures. Materials and Methods: Mutual coupling in hexagonal shaped CSRR metamaterial is compared with that of antenna array without metamaterial. Each material has 10 samples. The mutual coupling values are measured by varying the operating frequency. The G power of the antenna array is 0.8 and the maximum acceptable error rate is 0.05. Results: The experimental results indicate a reduced mutual coupling using hexagonalshaped CSRR metamaterial novel two element antenna array compared with the non-metamaterial array. The mean mutual coupling in hexagonal CSRR is -20.25 and in the non-metamaterial antenna array, it is -8.73 with the significance p = 0.0002. Conclusion: The hexagonal-shaped Complementary Split Ring Resonator (CSRR) metamaterial structure in a novel two element antenna array exhibits a better reduction in mutual coupling compared to the antenna array without the metamaterial loading.