A matching slot pair for a circularly-polarized slotted waveguide array
A matching slot pair for a circularly-polarized slotted waveguide array
复制标题
圆偏振开槽波导阵列的匹配槽对
DOI：
10.1049/ip-h-2.1990.0066
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
N. Goto
中科院分区：
文献类型：
--
作者：
J. Hirokawa;K. Sakurai;M. Ando;N. Goto
本文对圆极化波导缝隙阵的匹配缝隙对进行了分析和设计。缝隙的位置和尺寸被数值优化以抑制反射并在倾斜波束方向上实现期望的极化，这有助于天线效率的提高。为了准确计算口径场的相位，考虑波导壁厚，对匹配缝隙对进行了边值问题分析。在此分析的基础上确定槽的位置和尺寸。通过测量模型缝隙对的反射系数、辐射方向图和轴比，验证了设计的正确性。实验结果表明，在4GHz频段，回波损耗在0.1GHz以上小于-15dB，3dB轴比带宽在倾斜波束方向约为5%。<<ETX>>
The analysis and the design of the matching slot pair for a circularly polarized slotted waveguide array are described. The position and the size of the slots are numerically optimized to suppress reflection and to realize a desired polarization in the tilted beam direction, which contributes to the improvement of the antenna efficiency. A boundary value problem is analyzed for the matching slot pair taking the wall thickness of a waveguide into account in order to evaluate the phase of aperture fields accurately. The position and the size of the slots are determined on the basis of this analysis. The design is verified by measuring the reflection coefficient, the radiation patterns, and the axial ratio of a model slot pair. It was verified experimentally that the return loss is below -15 dB over 0.1 GHz at the 4-GHz band and the 3-dB axial ratio bandwidth is about 5% in the titled beam direction.<<ETX>>