The Lateral Wave Antenna
The Lateral Wave Antenna
复制标题
横波天线
DOI：
--
复制
发表时间：
2014
影响因子：
5.7
通讯作者：
D. Cavallo
中科院分区：
文献类型：
--
作者：
F. Tokan;N. T. Tokan;A. Neto;D. Cavallo
本文介绍了一种准平面天线，该天线在宽频带上提供在一个平面内的高度定向辐射、作为频率的函数的相位中心稳定性和高效率。该结构由支持横向电磁（TEM）波传播的介质填充平行板波导组成。波导被截断并成形为平面透镜，以实现H平面中的定向光束，同时在波导开口端处添加短扩口以促进辐射到自由空间中。高效率的实现得益于支持定向侧向波传播的特殊馈电结构。制作了天线样机并进行了测量。结果突出了具有非常低的色散和频率稳定的相位中心的准平面宽带天线（3：1带宽）的最高方向性。
This paper introduces a quasi-planar antenna that provides, over a broad frequency bandwidth, highly directive radiation in one plane, phase center stability as a function of the frequency and high efficiency. The structure is composed by a dielectrically filled parallel plate waveguide that supports the propagation of a transverse electromagnetic (TEM) wave. The waveguide is truncated and shaped as a planar lens to achieve directive beams in the H-plane, while a short flaring is added at the waveguide open end to facilitate radiation into free space. High efficiency is achieved thanks to the peculiar feed structure that supports the propagation of directive lateral waves. An antenna prototype has been manufactured and measured. The results highlight the highest directivity for a quasi-planar broadband antenna (3:1 bandwidth) with very low dispersion and frequency-stable phase center.