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Below is my DDRR model with a ground plane that seems to work. However, it does not show all the magical high vertical and horizontal gains reported...with it just 12" inches above the Earth.

I still see mostly horizontal gain 1.89 dbi at 0* degrees, with way less vertical gain at -16.36 dbi at -5* degrees, and Total Field gain at 1.96 dbi at 0 degrees. These gain numbers and angles seem more realistic for a 1/4 antenna antenna that is set low to the Earth.

[QUOTE="Marconi, post: 679941, member: 903"] Below is my DDRR model with a ground plane that seems to work. However, it does not show all the magical high vertical and horizontal gains reported...with it just 12" inches above the Earth. I still see mostly horizontal gain 1.89 dbi at 0* degrees, with way less vertical gain at -16.36 dbi at -5* degrees, and Total Field gain at 1.96 dbi at 0 degrees. These gain numbers and angles seem more realistic for a 1/4 antenna antenna that is set low to the Earth. [/QUOTE]

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