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Study of Ultra-High Efficiency Planar Antennas

超高效率平面天线的研究

基本信息

批准号：
63420032
负责人：
ANDO Makoto
金额：
$ 14.59万
依托单位：
Tokyo Institute of Technology (1989-1990)Tokyo University of Foreign Studies (1988)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63420032/
关键词：
planar array DBS High efficiency antenna Satellite TV reception Linearlyーpolarized RLSA Circularlyーpolarized RLSA Singleーlayered RLSA Radial line slot antenna.DBS 高能率アンテナスロット結合 RLSA ラジアルラインスロットアンテナ(RLSA)ラジアルライン導波路交差偏波識別度

项目摘要

The purpose of this study is to establish a design method of radial line slot antennas (RLSA's), which are high gain and high efficiency planar arrays. It consists of researches for (a) slot arrangement for circularly- and linearly-polarized RLSA's, (b) efficiency optimization (>80%) and (c) low-cost and massーproducible structure. Key technology utilized here is the field analysis to estimate the slot coupling to aversized radial waveguide as well as the reflection form the feeding structure. Following results were obtained.1. The shape of the feeding structure was numerically optimized and the overall antenna reflection was suppressed below ー17dB.2. In doubleーlayered RLSA with uniform slots, the slot length and the spacings were optimized experimentally. The antenna efficiency of 75% at the gain of 36.3dBi was realized, which is twice as high as that of conventional planar arrays.3. The coupling between slots and the radial waveguide, was analyzed by moment method. It enables the aperture illumination control by varying the slot length and the spacing. Reflection from slots can also be evaluated and suppressed based upon this analysis.4. Singleーlayered RLSA's of 25 to 60cm in diameter, were designed based upon 3. The excellent efficiency of about 80% were realized. These are also very attractive in terms of cost and massーproducibility and are now used commercially.5. Slot arrangement for linearlyーpolarized RLSA was proposed and the efficiency of 48% was observed.The bandwidth widening, reuse of the termination loss power and techniques for tiltedーbeam and dualーpolarization are left for further study.

本研究旨在建立一种高增益、高效率的径向线缝隙天线的设计方法。它包括（a）圆偏振和线偏振RLSA的槽布置，（B）效率优化（>80%）和（c）低成本和可批量生产的结构的研究。关键技术是通过场分析来估计缝隙对均匀径向波导的耦合以及馈电结构的反射。主要研究结果如下：1.对馈电结构的形状进行了数值优化，天线的总反射被抑制在17 dB以下。在双层均匀开槽的RLSA中，对开槽长度和开槽间距进行了实验优化。在增益为36.3dBi时，天线效率达到75%，是传统平面天线的2倍.用矩量法分析了径向波导与缝隙间的耦合。它通过改变狭缝长度和间距来实现孔径照明控制。基于此分析，还可以评估和抑制来自插槽的反射。4.单层RLSA的直径为25至60厘米，是根据3。实现了约80%的优良效率。这些在成本和大规模生产方面也非常有吸引力，现在已经商业化使用。提出了线双极化RLSA的缝隙结构，其效率为48%，带宽展宽、终端损耗功率的再利用以及倾斜双极化和双极化技术有待进一步研究。