Precise simulation tools are required for developing high performance surface acoustic wave (SAW) devices. Owing to rapid technological progress of computers, simulation techniques based on SAW field analysis, which usually need a large number of computer resources, have become applicable to device design. Although it has been well recognised how this simulation techniques are effective, it does not seem that they are extensively employed in actual device design. This is because a lot of knowledge and efforts are required for the development of practical software.

From this point of view, the present laboratory of Chiba University (hereafter, abbreviated to SAWLAB-CU) started free distribution of their computer software developed for SAW device simulation. The software including mathematical subroutines are distributed in the form of source codes. The manuals, and logs and outputs of the test run are also included in the software package.

Those who are interested in the software have only to register their names of the new users and sign the "Public License and Distribution Policy" to SAWLAB-CU, format of which is available from SAWLAB-CU by request. Free derivation and maintenance including related announcement of the software are entirely carried out through Internet. The registered users may execute, modify, and analyse the software for their computer environment without any prior consultation. SAWLAB-CU believes that the source distribution is beneficial to both the users and SAWLAB-CU, because it should be a great help for further improvement of and/or extension to the softwares resulting in more rapid progress in SAW research..

Combined
This package contains various tools for calculating SAW properties in complex structures. Practical SAW devices can successfully be analysed and simulated together with the coupling-of-modes (COM) theory. The package is composed of subpackages of FEMSDA, SYNC, LAYERED, OVERLAY, VCAL, EPS, MULTI. MSYNC, and OBLIQUE

COM
The software simulates SAW device performances using the coupling-of-modes (COM) theory, where the effects of the back-scattered bulk acoustic waves are taken into account. Simulation is carried out according to almost the same procedure for the conventional COM analysis. Device performances can be simulated rapidly if the device configuration is fully specified

Note that the software is developed under the Unix environment. Although Windows executable files are also included in the packages, you can modify the source code as you wish. Small hints are given for compiling my software on Windows environments