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一、引言本报告介绍了从缝隙、偶极了或螺旋一类普通的辐射单元中挖掘提高可用定向增益潛力的一些研究结果。G.V.Trentini在一篇短文中曾指出,单个辐射单元增益能任意增加,只要把单元放置在一是半反射器而另一是全反射器的两反射平板之间。这种天线的工作是以镜象或反射原理为基础的。因此,把这类天线称为镜象单元天线。镜象天线的基本原理和研制以及用它作为阵列单元的可行性是本报告研究的课题。二、工作原理天线背后放一块大导电屏能屏蔽天线的背向辐射,也能影响(取决于其间距)前向波瓣。但法线方向的方向性系数只能改善到一定限度,因为反射屏的照射不是最佳的,而且从更远区域反射的射线产生不同相的成分。
I. INTRODUCTION This report describes some of the findings of mining the potential for increasing the available directional gain from a common type of radiating element such as slot, dipole or helix. G.V.Trentini pointed out in an essay that the gain of a single radiating element can be arbitrarily increased by placing the cell between two reflecting plates, one being a half-reflector and the other a total reflector. The work of this antenna is based on the principle of mirroring or reflection. Therefore, this type of antenna is called the mirror unit antenna. The basic principle and development of mirror antenna and the feasibility of using it as an array unit are the topics studied in this report. Second, the working principle Put a large conductive screen behind the antenna can shield the antenna from the back radiation, can also affect (depending on its spacing) forward lobe. However, the directivity coefficient in the normal direction can only be improved to a certain extent because the reflection screen is not optimally irradiated, and the rays reflected from further areas produce components in different phases.