Queries: Antenna array and element separation distance

Hi there!

I am curious about antenna array design. I would like to know what is the separation distance required for an array of circularly polarised (CP) patch antennas. In order to achieve CP, I simply offset the probe feeds. The patch is rectangular (almost square). I initially thought it is identical to the separation distance of a linear case. However, I am beginning to doubt my thoughts.

Please advice and thank you in advance.

Sassyboy