Superdirective antennas with passive reflectors
Superdirective antennas with passive reflectors
复制标题
带无源反射器的超指向天线
DOI：
10.1109/74.382335
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发表时间：
1995
影响因子：
3.5
通讯作者：
V. Veremey
中科院分区：
文献类型：
--
作者：
V. Veremey
简要介绍了天线理论中的超方向辐射问题，并提出了由谐振散射体形成的结构的波散射问题的解决方案。该论文描述了 Veremey 和 Shestopalov 提出的一种二维超定向天线的构造，该天线具有一个有源元件和一个由谐振散射体非封闭圆柱体制成的反射器（参见《无线电科学》，第 26 卷，第 2 期，第 631-636 页，1991 年）。详细研究了引起超方向辐射效应的物理现象。结果表明，谐振元件之间的相互作用导致有可能在无源结构附近激发以高水平无功功率为特征的模式。特别注意超方向天线的灵敏度和容差限制。结果表明，一个未封闭圆柱体（或多个未封闭圆柱体）的槽角宽度在/spl plusmn/1%范围内的变化不会导致超方向共振的破坏。 >
A brief introduction to the problem of superdirective radiation in antenna theory, and a solution to the problem of wave scattering from a structure, formed by resonant scatterers, is presented. The paper describes construction of a two-dimensional superdirective antenna with one active element, and a reflector made of resonant scatterers-unclosed cylinders proposed by Veremey and Shestopalov (see Radio Science, vol.26, no.2, p. 631-636, 1991). Physical phenomena, which cause the effect of superdirective radiation, are studied in detail. It is shown that the interaction between the resonant elements leads to the possibility of exciting a mode characterized by a high level of reactive power, in the vicinity of a passive structure. Particular attention is paid to the sensitivity of the superdirective antenna, and to tolerance constraints. It is shown that changes of the angular width of a slot in an unclosed cylinder (or in several unclosed cylinders), within /spl plusmn/1%, do not lead to the destruction of the superdirective resonance. >