论文标题
宽阔的圆形圆形反射器基于宽带偏振器启用的调制元面天线
Wide-scanning Circularly Polarized Reflector-based Modulated Metasurface Antenna Enabled by a Broadband Polarizer
论文作者
论文摘要
本文提出了能够进行频率扫描的圆形极化波形天线。主要目的是在不需要复杂的饲料网络的情况下实现高增益和极化纯度。天线由两个独立的模块组成：（1）各向异性调制的元表面天线（MOMETA），用于生成垂直极化的辐射，其高度为19至47度的操作扫描范围； （2）具有高角度稳定性的宽带极化转换器，能够将线性极化转换为圆形极化（CP）。光圈场估计（AFE）方法用于设计天线，以高精度预测远场图案而无需全波模拟。在16至21 GHz的带宽中，天线的增益优于18 dBi。仿真结果表明，在其操作频率带宽上，最大增益方向的轴向比率低于3 dB，这表明偏振器的正常运行。为了验证仿真结果，制造天线的一个原型
A circularly polarized leaky-wave antenna capable of frequency scanning is proposed in this paper. The main objective is to achieve high gain and polarization purity without the need for a complex feed network. The antenna consists of two independent modules: (1) Anisotropic modulated metasurface antenna (MoMetA) for generating vertically polarized radiation with an operational scanning range of 19 to 47 degrees in elevation; (2) Wide-band polarization converter with high angular stability and capable of converting vertically linear polarization into circular polarization (CP). Aperture field estimation (AFE) method is used to design the antenna with high accuracy in predicting far-field pattern without the need for full-wave simulations. The gain of antenna in the bandwidth of 16 to 21 GHz is obtained better than 18 dBi. Simulation results show that the axial ratio in the maximum gain direction is lower than 3 dB all over its operational frequency bandwidth, demonstrating the proper operation of polarizer. In order to verify the simulation results, one prototype of the antenna is fabricated and its radiation patterns are measured in an anechoic chamber
