Flat Lens Antenna Technology for Free Space Material Measurements
Flat Lens Antenna Technology for Free Space Material Measurements
复制标题
用于自由空间材料测量的平面透镜天线技术
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
J. Welter
中科院分区：
文献类型：
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作者：
J. Schultz;B.P. Petrie;C.L Bethards;J. Maloney;J. G. Calzada;J. Welter
在VHF和UHF波段进行自由空间材料测量需要天线，这些天线必须又大又重，以适应这些波段中的长波长。大型天线使得测量不太实用且更昂贵。本文提出了一种新的平面透镜天线技术，它可以显着减少尺寸和重量相比，传统的宽带喇叭天线。这些新的天线利用人工介质加载与有损耗材料相结合，以提供类似于更大更重的喇叭的方向性。本文还介绍了这些天线的自由空间介电材料特性的直接应用。介电样品的示例测量显示了一对200 MHz至4 GHz的天线。
Free space material measurements at VHF and UHF bands require antennas that are necessarily large and heavy to accommodate the long wavelengths in these bands. Large antennas make measurement less practical and more expensive. This paper presents a new flat lens antenna technology, which enables significant reductions in size and weight compared to conventional wide bandwidth horn antennas. These new antennas utilize artificial dielectric loading combined with lossy materials to give directivities similar to much larger and heavier horns. This paper also presents the direct application of these antennas for free space dielectric material characterization. Example measurements of dielectric specimens are shown with a pair of 200 MHz to 4 GHz antennas.