This paper presents a novel design of compact dualpolarized multi-input and multi-output (MIMO) antennas with endfire radiation for millimeter-wave wireless applications. The low-cost printed circuit board process serves as the basis for the design, fabrication, and measurement of the proposed dualpolarized quasi Yagi-Uda antennas. Addressing the potential antenna locations in a mobile terminal, this paper investigates both the corner and the lateral design of antenna modules. Each design incorporates dual-port dual-polarized antennas co-located in a compact area. The lateral design is further extended to a linear 1×4 array for high-gain and phased-scanning operation. Experimental results show that the proposed compact dual-polarized quasi Yagi-Uda antennas are very suitable for MIM terminals of next-generation (5G) mobile communications.
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Hsu et al. (2017) studied this question.
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