Large-Domain MoM for CAD of Antennas and Scatterers

Abstract

Common MoM-based procedures are of subdomain type, requiring a large number of complex unknowns per wavelength cubed (on the order of 3000). This limits the application of the method to structures not exceeding few wavelengths cubed. A possibility to extend the MoM to larger structures are large-domain procedures. This chapter is aimed at describing such a procedure, to illustrate it on a number of examples, and to demonstrate its relative advantages and disadvantages with respect to subdomain procedures. The principal conclusion is that large-domain procedures can analyse considerably larger structures on the same computer in the same amount of time. However, the complete algorithm requires probably much more time than one of the subdomain type, and to obtain an efficient large-domain computer code a complicated programming is indispensable. Nevertheless, the authors believe that, due to its advantages once the code has been completed, the large-domain MoM might replace subdomain MoM in relatively near future.