Antenna pattern interpolation by generalized Whittaker reconstruction

Whittaker reconstruction is an effective tool for interpolation of band limited data. Whittaker (1915) originally introduced the interpolation formula termed the cardinal functions as the function that represents a set of equispaced samples but has no periodic components of period less than twice the sample spacing. The method is a useful tool in the analysis and design of multiple beam reflector antenna systems. A good description of the method has been given by Bucci et al. (1980). The authors discuss some problems encountered with the method and their solution