Mutual Coupling Reduction Between MM-Wave Microstrip Antennas Using CSRR Metamaterial Structure

A new design of significant mutual coupling reduction antennas using metamaterial structure (MTM) is introduced. The technique which is used to reduce the coupling is complementary split ring resonator (CSRR) loaded between the two microstrip patches. The proposed antenna is designed to be operate at frequency of 28GHz. This structure suitable to operate in 5G and mm-wave antenna systems. A significant improvement in coupling between antennas is obtained. The maximum isolation achieved by etching the CSRR on the ground of the proposed antenna and on a floated ground between the two patched is 31.7dB. The distance from edge-to-edge of the patch antennas is 0.4λ0. In addition to design and simulate the proposed antenna using CST program, it is also fabricated and measured. Good agreements is achieved between simulated and measured results.