Antenna pattern synthesis

Summary form only given. The advances in the field of antenna pattern synthesis due to R.S. Elliott are reviewed, including linear and planar arrays, and continuous planar apertures. A method was developed by R.S. Elliott for equispaced linear arrays to control the amplitude of each sidelobe individually, and at the same time, have the main beam shape match a desired shape to within an arbitrary maximum error. The method is based on modifying the roots of the array factor polynomial, a process that is well illustrated by the location of the roots with respect to the Schelkunoff unit circle. In an extension of the method a computationally efficient iterative method to find the optimum root locations for shaped beam pattern synthesis was described. The pattern synthesis method has been extended to planar apertures. It has been validated experimentally in a number of cases.<>