论文标题
Terahertz线性天线阵列的分析范围依赖性光束聚焦模型
An Analytical Range-Angle Dependent Beam Focusing Model for Terahertz Linear Antenna Array
论文作者
论文摘要
本文认为，配备有线性天线阵列的Terahertz（THZ）发射器希望将其光束聚焦到近场阵列中所需的空间区域。目的是计算可实现的空间区域，并确定系统参数（例如载体频率，阵列维度和用户的位置）如何影响其光束焦点性能。首先，基于分析几何学定理，我们表明可实现的聚焦空间区域构成旋转的椭圆形，X和Y坐标分别表示范围和角度。这样，空间区域的确定被简化为推导椭圆覆盖率的问题。然后以封闭形式获得可实现的覆盖范围，并提供可以在分析控制梁聚焦性能的载体频率偏移量的构造。数值结果验证了理论发现并证明了所提出方法的性能。
This paper considers a scenario in which the Terahertz (THz) transmitter equipped with a linear antenna array wishes to focus its beam to a desired spatial region in the array near-field. The goal is to compute the achievable spatial region and determine how the system parameters such as the carrier frequency, the array dimension and the user's location affect its beam focusing performance. First, based on a theorem from analytic geometry, we show that the achievable focusing spatial region constitutes a rotated ellipse, with the x and y coordinates denoting the range and angle, respectively. In this way, the determination of the spatial region is reduced to a problem of deriving the coverage of an ellipse. The achievable coverage is then obtained in closed form, and the construction of carrier frequency offsets that can analytically control the beam focusing performance is provided. Numerical results validate the theoretical findings and demonstrate the performance of the proposed method.
