  This work derives exact expressions for the radiation from two conductors non
isolated TEM transmission lines of any cross section in free space. We cover
the cases of infinite, semi-infinite and finite transmission lines and show
that while an infinite transmission line does not radiate, there is a smooth
transition between the radiation from a finite to a semi-infinite transmission
line. Our analysis is in the frequency domain and we consider transmission
lines carrying any combination of forward and backward waves. The analytic
results are validated by successful comparison with ANSYS commercial software
simulation results, and successful comparisons with other published results.
