You may with to check out SimSmith.http://groups.yahoo.com/group/SimSmith/?yguid=124226559
SimSmith is a Smith Chart CAD software package. Written in Java, SimSmith runs on Window XP, Windows 7, Apple OSX and Ubuntu. It uses the JRE-1.6 runtime environment.
SimSmith is unique in several ways: it has only one screen which can be scaled to any size display, it allows any number of circuit elements, it allows the algebraic expression of circuit elements, it models transmission line losses, it allows 'load files' to be imported from antenna analyzers and antenna simulation programs.
SimSmith circuits can be saved and shared between users.
This group provides a medium for sharing circuits, techniques, feature requests and feature announcements.
SimSmith can be downloaded from www.ae6ty.com/Smith_Charts.html
73, Jim, AL7FS