High-Impedance Surface-Based Null-Steering Antenna for Angle-of-Arrival Estimation
High-Impedance Surface-Based Null-Steering Antenna for Angle-of-Arrival Estimation
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DOI：
10.1109/tap.2021.3137469
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发表时间：
2021
影响因子：
5.7
通讯作者：
Jo Tamura;H. Arai;T. Itoh
中科院分区：
文献类型：
--
作者：
Jo Tamura;H. Arai;T. Itoh
设计并实验演示了一种具有高阻抗表面（HIS）的零点转向天线，可改善到达角（AoA）估计。由于 HIS 有助于确保阵列中各个元件的方向图相同，因此所提出的天线可以以低波动执行零点扫描，而无需控制天线元件的幅度比。仿真结果表明，所提出的天线在 2.4 至 2.6 GHz 范围内以 120° 的角度扫描 H 平面中的零点，扫描结果大于 -30 dB。此外，测量的 S 参数和单元图案与模拟结果非常吻合。总体而言，所提出的天线可以在 150 MHz 的采样频率下成功扫描 60° 范围内大于 -30 dB 的零点。
A null-steering antenna with a high-impedance surface (HIS) to improve angle-of-arrival (AoA) estimation is designed and experimentally demonstrated. Because the HIS helps ensure that individual element patterns in an array are identical, the proposed antenna can perform null scanning with a low fluctuation without controlling the amplitude ratio of antenna elements. The simulation results demonstrate that the proposed antenna scans a null in the H-plane in 120° with greater than -30 dB from 2.4 to 2.6 GHz. Further, both the measured S-parameters and element patterns agree well with the simulated results. Overall, the proposed antenna can successfully scan a null greater than -30 dB in 60° at a sampling frequency of 150 MHz.