基于T型结馈电的单层波导缝隙阵天线设计

Design of a Single-layered Slotted Waveguide Array Fed by T-junction

单层波导缝隙阵天线与多层波导缝隙阵天线相比,具有结构简单,纵向尺寸更小,加工成本低等特点。文章采用天线阵列综合及Elliott设计方程完成了单层波导缝隙阵的阵面设计,分析了T型结结构及其场分布,并由T型结形成单层波导缝隙阵天线的馈电网络,实现了任意功率分配;将天线整体在Ansoft HFSS中建模仿真,验证了该设计方法的正确性。仿真计算结果表明:T型结可实现相位反相功率任意分配馈电,可以作为单层波导缝隙阵天线的功分单元。

Compared with muti-layer slotted waveguide array, single-layered slotted waveguide array has simpler configuration, smaller longitudinal dimension and lower artifactitious cost. In this paper, array aperture of single-layered slotted waveguide array antenna are designed by using array synthesis and Elliott design equations. The configuration and field distribution of T-junction are analyzed. Feed network formed by T-junction can distribute the input power in arbitrary ratios to the radiating branches of single-layered slotted waveguide array. The whole antenna is simulated with Ansoft HFSS and the design approach is validated right. Simulated results show that T-junction can distribute the input power in alternating phase and in arbitrary ratios to the radiating branches. T-junction feed network can be power dividers for the single-layered slotted waveguide array.