URGENT Help me ///can the directivity be less than 1 in cst mws

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kartikkhurana

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hi all
i am tring to plot the radiation pattern of a monopole printed antenna with cst (in gain ieee and polar plot with phi=0 and 90 degress and theta variable )
i got results where it shows that the results iaccurate and directivity less than one ie the radiation pattern is moving out of 0 db what mistake i commited in simulations
the gain vs frequency curve of the antenna is fron 2dB to 5dB.no problem here
I want to plot the curves as seen here( any of these types)
which software should i use to plot E and H plane at say 3 GHz on same polar plots from the cst exported files
regards
kartik

- - - Updated - - -

how to get plots in third picture
is the third picture plot correct
what does it mean when gain is not -ve in db
ie above odb
 

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  • coplar and crosspolar in H plane.png
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  • coplar and crosspolar in E plane.png
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  • radiation pattern.png
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