Binary package “yagiuda” in ubuntu jaunty
software to analyse performance of Yagi-Uda antennas
You give the dimensions and positions of each element, and the
program calculates gain, input impedance, front-to back ratio,
beam-patterns etc. An optimisation program 'optimise' tries to
optimise a design. The optimiser can also tell you the sensitivity
of a good design, to small mechanical errors.