Quote:
Originally Posted by Richard Fry[_3_]
Where is the coil on the linear monopole?
Sorry, I forgot to address this question directly. Both radiators
were base fed.
As shown at the top of that comparison page, a total of 30 ohms was included
in each NEC model to account for the loss in the connection to r-f ground,
and in the loading coil. That is why the maximum gain of both models is
about -19.5 dBi, rather than 4.77 dBi.
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NEC codes has disadvantages when simulating curved antennas like helix, since straight wire segments are used to model antenna geometry,which introduces a numerical error at the very beginning of the calculations, so numerical results become difficult to interpret. Curved MoM codes like
AN-SOF should be used in this case.