The model as it exists after a few more edits of the one on page 13, I'm at 119 +j195. This is less than 10:1 SWR before any form of matching network has been applied. This version of the antenna also has 4.72 dBi gain, and if you add in an L-Network for matching, which is to simulate a gamma, still has 4.69 dBi in gain. This is not a gamma, mind you, just the addition of a matching network to simulate some losses for matching purposes. The natural tune isn't so bad that you can't efficiently match the antenna.
Where the feedpoint is does affect the antennas tune, and even a small change in its location has pretty serious effects on the antennas gain. It is between 0.1 and 0.2 wavelengths up from the bottom of the the vertical element. That is where everything comes together for the best performance. Mind you that is the model simulating a standard feedpoint and not a gamma match. Applying a gamma match, which is still something I plan on doing with this model, will be an interesting experience...
The models I have made treat the radials as longer than 1/2 wavelength elements as they go up the inside, down the outside, and then travel on the mast some. On my model I would put them at closer to 3/4 wavelengths total, if not a little more.
Also a note on something I posted yesterday, my segments. The segments in my models are not 10 mm long, they are 100 mm, or 0.1 meters long.
The DB
