Design of a Miniaturized Dual-Polarized Slot-Coupled Patch Antenna Element and Its Sub-array

A novel miniaturized, low profile, dual-polarized slot-coupled patch antenna and its sub-array for 5G massive (multi-input and multi-output) MIMO antenna is proposed in this letter. The antenna mainly consists of three parts: metal sheet (Radiator), feeding network and metal cover with cavity on it. The proposed antenna element is fed by two “H” type slots on the PCB board which are orthogonal to each other. The ports feed to the opposite of the slot through a power divider. The radiation sheet is fixed to the PCB board by plastic screws and the PCB board is fixed to the metal cover by metal screws. Then, three antenna elements are connected by one-three power dividers to achieve a sub-array. The Sub-array antenna has excellent impedance matching, low loss, easy assembly, good consistency and low cost. It can be widely used for 5G massive MIMO applications.