A Compact Hemispherical Beam-Coverage Phased Array Antenna Unit for 5G mm-Wave Applications
A Compact Hemispherical Beam-Coverage Phased Array Antenna Unit for 5G mm-Wave Applications
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DOI：
10.1109/access.2020.3013068
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发表时间：
2020-01-01
期刊：
影响因子：
3.9
通讯作者：
Choi, Jaehoon
中科院分区：
文献类型：
--
作者：
Bang, Jihoon;Choi, Jaehoon
本文提出了一种用于 5G 毫米波应用的具有单向半球形波束覆盖的紧凑型薄型相控阵天线单元。所提出的结构采用四子阵列配置，以在垂直于基板的视轴方向上实现单向半球形覆盖。建议将人工磁导体 (AMC) 支持的缝隙天线阵列作为子阵列，其最佳间隔距离为 1.9 mm（28 GHz 时= 0.31 lambda）。所提出的天线增加了 H 平面波束宽度，测量峰值增益为 11.62 dBi，并在仰角平面中提供所需的宽倾斜波束方向图。所提出的天线还在方位平面+/- 45 度范围内提供转向波束。由设计的四个子阵组成的半球形覆盖相控阵天线单元的整体尺寸为80.8 mmx80.8 mmx2.4 mm。对于 5 dBi、8 dBi 和 10 dBi 的阈值增益，所提出的相控阵天线单元的覆盖效率分别为 0.82、0.71 和 0.61，其中最大立体角为 2 pi 球面度。
A compact low-profile phased array antenna unit with unidirectional hemispherical beam-coverage for 5G mm-wave applications is proposed in this paper. A four-subarray configuration is used for the proposed structure to achieve unidirectional hemispherical coverage in the boresight direction normal to the substrate. An artificial magnetic conductor (AMC)-backed slot antenna array with an optimal separation distance of 1.9 mm (= 0.31 lambda at 28 GHz) is proposed as a subarray. The proposed antenna has increased H-plane beamwidth with the measured peak gain of 11.62 dBi and provides the desired wide inclined beam pattern in the elevation plane. The proposed antenna also offers steered beams over the range within +/- 45 degrees in the azimuth plane. The hemispherical-coverage, phased array antenna unit composed of the four designed subarrays has overall dimensions of 80.8 mmx80.8 mmx2.4 mm. The coverage efficiencies of the proposed phased array antenna unit are 0.82, 0.71, and 0.61 for threshold gains of 5 dBi, 8 dBi, and 10 dBi, respectively, where the maximum solid angle is 2 pi steradians.