套磁介质的小振子天线

在短波波段对外套介质的小振子天线的基本参数进行了理论计算和实验测量,说明套磁性介质可以降低振子的谐振频率,改善谐振点的辐射电阻,但使频带变窄,效率降低。起主要作用的是介质与内导体的半径比,而不是介质的绝对尺寸。用表面波传输线近似理论说明了这类振子的特性,讨论了设计套磁介质振子的手续。关键词：

MAGNETIC COATED SMALL DIPOLE ANTENNA

Theoretical calculations and experimental measurements of the basic parameters of coated small dipole antenna were carried out in the short wave range. It was concluded that the resonance frequency of the dipole could be lowered and the radiative resistance could be improved by magnetic coating at the price of some loss in band width and efficiency. The radii ratio of the coating and the inner conductor played a primary role as compared to the absolute size of the magnetic material. In addition, the characteristics of the magnetic coated antenna was explained within the framework of an approximate theory based on surface wave transmission line concepts. The design procedure of such antennas was also discussed.