This paper proposes a dual-band dual-polarized antenna which can operate at both the 1.71–2.69 GHz band (3G/4G band) and the 3.3–3.8 GHz band (5G NR band 78). The main radiator (crossed dipoles) is meticulously designed to obtain the two desired bands of interest, and the fan-shaped feeding structures are used to obtain good impedance matching. The measured low band and high band operations was 49.8% (1.69–2.81 GHz, VSWR ≤ 1.5) and 14.8% (3.32–3.85 GHz, VSWR ≤ 2), respectively. The measurement results also show that this antenna has good isolation, stable radiation pattern, and good XPD.

中文翻译：

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适用于小型基站应用的双频双极化天线

本文提出了一种双频双极化天线，它可以在1.71–2.69 GHz频带（3G / 4G频带）和3.3–3.8 GHz频带（5G NR频带78）下工作。主辐射器（交叉偶极子）经过精心设计，以获得两个所需的感兴趣频段，并且扇形馈电结构用于获得良好的阻抗匹配。测得的低频带和高频带操作分别为49.8％（1.69–2.81 GHz，VSWR≤1.5）和14.8％（3.32–3.85 GHz，VSWR≤2）。测量结果还表明，该天线具有良好的隔离度，稳定的辐射方向图和良好的XPD。