Greetings,
I'm a bit stuck on a problem involving the interpretation of various radiation patterns that are depicted in antenna spec sheets. I get the general orientations (XY, YZ, XZ, or, alternately, Azimuth, Elevation (phi=0), Elevation (phi=90)), but the polarities are throwing me.
A typical spec sheet lists two curves on each of the three orientations, one for horizontal polarity and the other for vertical. I believe that the main determining factor for the polarity is the orientation of the longest element in the antenna (assuming linear polarity to start with).
So, if my assumption above is true, why does the XY-V cut not look like the XZ-H cut? Is it due to the position of and reflections from earth ground?
Thanks for any help in getting my head straight on this,
Mike
I'm a bit stuck on a problem involving the interpretation of various radiation patterns that are depicted in antenna spec sheets. I get the general orientations (XY, YZ, XZ, or, alternately, Azimuth, Elevation (phi=0), Elevation (phi=90)), but the polarities are throwing me.
A typical spec sheet lists two curves on each of the three orientations, one for horizontal polarity and the other for vertical. I believe that the main determining factor for the polarity is the orientation of the longest element in the antenna (assuming linear polarity to start with).
So, if my assumption above is true, why does the XY-V cut not look like the XZ-H cut? Is it due to the position of and reflections from earth ground?
Thanks for any help in getting my head straight on this,
Mike
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