8 X 4 mm-Wave 3D Printed MIMO Antenna for 5G Wireless Communication

A 3D printed 8 X 4 mm-wave multiple input multiple output (MIMO) antenna is presented in this paper. The proposed MIMO has an overall dimensions of 106.3 mm X 75.7 mm and it operates at 28 GHz mm-wave band. The proposed MIMO consists of 32 single elements where, each of the MIMO element consists of two structures. The first structure of each element is a feeding layer and the second is a radiating structure which is the 3D printed antenna. The radiating structure consists of a slot antenna surrounded by cavity and corrugations that improve the gain of the antenna. Furthermore, the proposed MIMO has 16 elements radiate in the boresight direction and 16 elements with side wall that radiates in different directions covers the elevation plane. Hence, the proposed MIMO provides beam switching functionalities up to ∓30° in the elevation by switching between different element that have different wall heights.