Experiments and calculations on surface-wave antennas

This paper discusses the calculations and corroborating measurements that were made of the near and far fields of electromagnetic waves propagating along and emanating from structures whose equivalent index of refraction is a function of the direction of propagation. The radiation patterns for a linearly tapered array at 2750 Mc and 3000 Mc were calculated using simple approximations of the near field. These calculations showed good agreement with the measured patterns. There was a discrepancy, however, between the measured and calculated far fields at 2500 Mc.