Does anyone know of an antenna modeling program for Ubuntu / Linux. All of the computers in my home run Linux so NEC is not an option for me. Are there any web based antenna modeling sites? And lastly, are there any web pages that teach some basics of antenna modeling? I have the ARRL antenna book and it is very lacking in teaching the basic aspects of the subject.
NEC is in FORTRAN IV and runs just fine under Linux. You may need to get sources and compile it with gfortran. There might be precompiled binaries out there. You won't get a fancy GUI and stuff, but there are utilities out there to plot patterns with GNUPLOT, etc.