SOME INVESTIGATIONS ON DIELECTRIC AERIALS - PART III

Abstract

The two theories (Chatterjee  et al.,  1956, 1957) for the radiation of a dielectric  rod aerial excited in the HE 11  mode have been experimentally verified in the case of  perspex rod aerials of lengths varying from  2L0 to 10L0  and diameter  0.5 L0  in the  &-= 0 degree plane. Experiments have also been done for aerials of different diameters  varying from  0.4 L0  to 0.8 L 0  and length 10 L0 .  There is close agreement between the two theories and experiment with regard  to the positions of maxima and  minima for the higher order secondary lobes. In  the case of the first minor lobe for some values of L/L 0  the deviation is appreciable.  Measured values of beam width for major lobes for different lengths of aerial and  d = 015  L0  agree fairly well with the theoretical values.