Take care to note that this design is impossible to model as it
violates every software package's capacity to allow closely spaced
wires. There are absolutely no software products, nor freely
available packages that perform this analysis - you are now in faith
based alchemy. Any claims to the contrary (contradicting this faith
based illusion) are delusional. This level of delusion can be
confirmed by the whole absence of reference, citation, or offering of
results of double-blind testing.

73's
Richard Clark, KB7QHC

You could always use a lumped element model, but be sure a balun
is not included, in order to maximize radiation from the coaxial feedline
shield.

Frank