Directivity for the patch

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cuongtran

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Hi everybody,

I fabricated an antenna patch on the surface HIS, but now my antenne have two principal lopes , the gain is not so good, So anybody has the solution for me for augmenting the gain and for radiating only one lope's principal? pls help.
I will appreciate all the help.

Just a look ex..
 

We need some more information, what model were using to design and the substrate properties including its thickness. I have designed patch antennas and the patterns are quite okay.
 

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    cuongtran

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if there are two principle lobes, that means it is higher mode not the doninant mode.
 

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    cuongtran

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Thank you,
Hi manenef

Added after 2 minutes:

Hi, I used HFSS and my substrat had eps of 4, the patch is not just on the surface, it is higher some mm, is it the probleme?

Thanks,
Hi mane, would u mind to post your file here plz?
 

try to reduce the patch dimension to avoid the higher mode
 

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