Millimeter-wave MIMO Antennas with Polarization and Pattern Diversity for 5G Mobile Communications - The Corner Design

摘要

This paper presents a compact MIMO antenna design with polarization and pattern diversity operating in the millimeter-wave (mmW) band for MIMO-based 5G mobile communication systems. Based on a corner environment of a terminal device, the proposed MIMO antennas are very compact, consisting of 4 antennas and 8 polarized ports with 4 directive patterns. The diversified patterns includes three end-fire patterns and one broadside pattern. We proposed a rectangular aperture antenna with a backed cavity for the broadside pattern and modified quasi-Yagi antennas for the end-fire patterns, all in the same multi-layered PCB process. Each antenna exhibits dual-polarized ports with decent isolations. The developed prototype antennas possesses promising results, including the worst-case port isolation of 17 dB and impedance bandwidth of 25%.