Compact Wideband Circularly Polarized Microstrip Antenna Array for 45 GHz Application
Compact Wideband Circularly Polarized Microstrip Antenna Array for 45 GHz Application
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DOI：
10.1109/tap.2018.2863243
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发表时间：
2018-11
影响因子：
5.7
通讯作者：
Zheng Gan;Zhihong Tu;Z. Xie;Q. Chu;Yue Yao
中科院分区：
文献类型：
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作者：
Zheng Gan;Zhihong Tu;Z. Xie;Q. Chu;Yue Yao
提出了一种应用于IEEE802.11aj（45 GHz）的宽带圆极化（CP）4 × 4毫米波天线阵，该天线阵由新型微带天线单元组成。通过在微带天线单元中引入L形分支和截角，获得了24.9%的阻抗带宽和17.3%的3dB轴比（AR）带宽。为了阐明L形分支和截角的影响，提取并分析了（0，0，r）点处180°和90°电场分量的相位差和幅度比。设计了一个简单紧凑的微带馈电网络来激励CP天线阵列，并使用两层PCB板来实现所提出的阵列。电磁能量通过蚀刻在中间接地上的孔从馈电网络耦合到辐射器。在41.9 ~ 49.1GHz范围内，天线阵的3dBAR带宽为16%，增益在41 ~ 49 GHz范围内均大于17 dBic。
A wideband circularly polarized (CP) $4 \times 4$ millimeter-wave antenna array composed of novel microstrip antenna elements is presented for IEEE 802.11 aj (45 GHz) application. Through introducing the L-shaped branches and truncated corners to the microstrip antenna element, an impedance bandwidth of 24.9% and a 3 dB axial ratio (AR) bandwidth of 17.3% are achieved. To clarify the effects of the L-shaped branches and truncated corners, the phase difference and amplitude ratios of the 180° and 90° electric field components at the point of (0,0,r) are extracted and analyzed. A simple and compact microstrip feeding network is designed to excite the CP antenna array, and two-layer PCB boards are used to implement the proposed array. The electromagnetic energy is coupled to the radiators from the feeding network through the aperture etched on the middle ground. The measured 3 dB AR bandwidth of the antenna array is 16% from 41.9 to 49.1 GHz, and the measured gain is all greater than 17 dBic within the band from 41 to 49 GHz.