NEC-LIST: Average gain test and diagnosing the source of the problem

Hi,

If the average gain test shows that your model has a problem then what is
the best way to identify the cause of the problem ?

There is some great information available about this test but not many
examples of "issues" and how they were identified and resolved.

I'm keen to learn.

My particular interest is antennas on wire grid models. I have looked at a
number of great papers that describe wire grid guidelines.

I have a model (source unknown) that had its square wire-grid
"triangulated". In an effort to make the model fit the guidelines I set
about progressively removing the "triangulating wires" in an attempt to be
more compliant with the guidelines. The only trouble was that the average
gain test results got progressively worse.

I have a colleague that is building a different model from scratch. As he
is building the model his gain test results are also getting worse...but he
is unsure why.

We appear to be missing a piece of the puzzle.

I'd appreciate your help.

Thanks,

Michael.

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