Hello All,
I've been stuck at one point trying to figure out how a circular array works.
So, shown in the first figure is the antenna array that I have designed, where the center patch is probe fed and all the remaining elements that are arranged in a circular manner are fed by the transmission lines.
Shown in the second figure is the radiation pattern of the designed antenna, where the beam is broad at Phi= 0 deg and narrow at Phi=90 deg.
So, why does the radiation patterns are not similar when the number of array elements are equally arranged in both X and Y planes?
**(The array elements are number from 1 to 5)**
Is it due to the feed point location, which led to the insufficient current distribution to elements 3 and 5?
Thank You
Harinath
Dear Mekala Harinath Reddy ,
I think your assumption seems to be correct. In the YZ plane, (phi=90º) you have 3 excited elements however in the XZ plane (phi=0º) only the central element is radiating. Clearly you do not see that the field is coupling in elements 3 and 5. That is why you get the radiation diagrams you show. They are very consistent with the behavior of the antenna.
Best regards,
Miguel
You have connected resonators 3 and 5 to places on the central patch where there is no electric field so no coupling.
Thank you, Miguel Ferrando-Rocher, Malcolm White, and Biswarup Rana
Harinath
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