I think I've made models with the Feed Line where I also off-set the 2 wires so folks could see the coaxial application. Don't know if I tried to explain, but if I did it was likely in vain.
This 2 wire Transmission Line business has been a jumble of misundersting regarding modeling, since Henry's did his work on the Sigma 4. The TL is hard to see and thus it is even harder to explain. I don't believe I'll be modeling a 3rd wire.
Below are some exhibits of the GM up as close as I can get, trying to show the "T" in a little box that is indicating the wire is coaxial.
Bob, when the Eznec manual explains a Transmission Line and says we have to add a wire to the model...it only means we have to have a conductor and that is a wire. Eznec cannot make a Transmission Line from point A to point B without a without a wire conductor to enter the data into the TML Tool spreadsheet. The TL tool allows me to lay a coaxial line over this wire and sometimes it shows-up (easy to see) and sometimes it doesn't.
This is why I included the Wire Description Report...so you could see the addition of all the TL tool data that I added to the GM model. Sometimes if you use a magnifying glass you can see the two wires...similar to when you are able to see the segments being in a symmetrical-line-up on the A/P and the S4 designs for the cones.
I think MMANA-GAL might allow folks to create a Feed Line with the click of a button.
I meant to number the pages so as to make for easy referencing, but I forgot to complete those page #'s.
I added a few notes, but rather than trying to explain in words, take a look, an if you have a specific question just ask.
