In this paper, a novel miniaturized planar antipodal Vivaldi antenna (AVA) with high gain and back radiation reduction for 5G millimeter-wave (mm-Wave) communication is presented. First, due to the use of the gradual corrugated edges (GCE), the operating band of the antenna is extended in the direction of lower frequencies and the overall gain is also improved as well. Second, its gain of the antenna is better enhanced at the high frequency band through I-Shape Metal Director (IMD). Lastly, to further reduce the back radiation, the split ring resonance branches (SRB) are added to the ground. The antenna front-back ratio has improved considerably to over 20 dB. Meanwhile the antenna gain is improved further. Furthermore, a prototype antenna array was fabricated and the measurement results clearly show that the antenna array gain varies in the range of 15.86–16.43 dB when operating in the 5G millimeter wave band (24.75–28.35 GHz).

中文翻译：

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一种新型小型化增益增强对映维瓦尔第天线，可减少背向辐射

在本文中，提出了一种用于 5G 毫米波 (mm-Wave) 通信的具有高增益和背向辐射减少的新型小型化平面对足 Vivaldi 天线 (AVA)。首先，由于采用了渐进波纹边缘（GCE），天线的工作频带向低频方向延伸，整体增益也得到了提高。其次，通过 I-Shape Metal Director (IMD) 可以更好地增强天线在高频段的增益。最后，为了进一步减少背向辐射，将裂环谐振支路 (SRB) 添加到地面。天线前后比已显着提高至 20 dB 以上。同时天线增益进一步提高。此外，