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An Aperture Coupled MIMO Antenna Decoupling Between Patches Using EBG Structure

Microstrip antenna widely used in many different devices benefit from its low profile, low gain, and narrow band characteristics. In this paper, an aperture coupled MIMO antenna is designed, and a novel EBG structure is proposed for decoupling between two patches of the MIMO antenna. Aperture coupling is a non-contact feed technology. Compared with direct contact, aperture coupled MIMO antenna has some advantages, such as simplifies the manufacturing process. EBG structure has high impedance surface to form surface wave frequency band gap, compared with other decoupling structure, the decoupling effect of EBG structure is better. Proposed EBG structure can effectively reduce the coupling between the two patches. Coupling effect between two patches of the MIMO antenna decreased 16.5dB at the operating frequency of 2.45GHz by inserting the EBG structure between the two patches.