An Element Position Modulated Antenna Array

Analysis has been presented for a non-uniformly spaced linear array of large number of isotropic elements at locations obtained by simusoidal position modulation. Studies on the space factor of such an array reveal lower sidelobe and grating plateaux levels in comparison to the uniform array. This type of array can be designed to phase scan the beam over a very wide range with low sidelobes. The sidelobes are expected to be lower for nonuniform excitation. Computed results for a 147 element array have been presented to confirm the analysis.