Topband: Monopole Radiation Patterns, takeoff angles etc

Richard Fry rfry at adams.net
Sun May 6 11:21:13 PDT 2012


Rik van Riel wrote:
>The problem is that radiation does not just have an amplitude,
>it also has a phase angle.

>At certain ground resistances, the ground wave and the low angle
>sky wave will cancel each other out, which moves the angle of
>radiation up.

If that were true, the low-angle radiation would not move up to create a 
lobe centered on a "takeoff angle."

But in any case, the graphic linked below (Terman) does not show a lack of 
radiation from a monopole at elevation angles between 1 and 5 degrees.

http://i62.photobucket.com/albums/h85/rfry-100/TermanFig55.jpg



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