 The radial method has been falling out of favor for methods based on Cartesian coordinates.Cartesian methods require more CPU time (and memory) to compute, but are understood to more realistically represent antenna systems.The main importance of the radial methods is that a quick "antenna system proof" can be "completed in less than 15 minutes" (often in only 5 minutes) of a typical home computer's CPU time, regardless of antenna system complexity.