Applicability of single precision graphics processing unit for fast simulation of 2D surface acoustic wave devices using an hierarchical cascading technique

Abstract

This paper discusses the applicability of a single precision computation with a graphics processing unit for the finite elements method simulation of surface acoustic wave (SAW) devices using the hierarchical cascading technique (HCT). The HCT simulation is performed in both single and double precision, and the required computational time, memory size and accuracy are compared. Three SAW device structures are discussed; (a) a synchronous resonator on 42 YX-LiTaO3 (42-LT), (b) a double mode SAW (DMS) filter on 42-LT, and (c) a synchronous resonator on 42-LT/Si bonded wafer. It is shown that the single precision enables us to double the calculation speed and halve the memory size with negligible accuracy deterioration.