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Radiation Pattern Check

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mickey123

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Hello,
Can someone please check my radiation pattern for a multiband coaxial fed patch antenna and tell me if they are fine. If not, what should be the improvements?

3250MHzEPlane.png3250MHzHPlane.png
2510MHzEPlane.png2510MHzHPlane.png
1267MHzEPlane.png1267MHzHPlane.png

Urgent help needed !!!
Thanks in advance :)
 

1. Is it necessary that the radiation pattern be observed at phi=0 and phi=90 only ?
2. Is it fine to have a negative gain at phi=0 and positive at phi=90 ?
3. Is there a particular pattern to be observed ?
4. Should we check gain or directivity ?
 

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