Full-wave scattering from reflector antennas on electrically large platforms using low-memory computers

We consider the use of full-wave integral equation techniques on scattering problems from reflector antennas on electrically large structures, and consider how an implementation of such techniques could use an inexpensive solid-state drive (SSD) rather than costly random access memory (RAM). We begin by showing how a Multi-level Fast Multipole Method (MLFMM) code based on Higher-Order (HO) basis functions has fundamental properties that make it feasible to use disk storage for the less frequently used algorithm data. Then, we show how the use of the SSD allows us to solve larger problems than the RAM of the computing platform makes room for. Finally we consider how this implementation has only a modest impact on the computational time, particularly when compared to the reduction in financial cost of SSD storage rather than RAM.

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