Describe the basic structure of your design. What kind of feed lines are you contemplating? How big is the antenna? What are the general requirements?
What are the other physical requirements? Mounting interface?
What are your radiation requirements and goals? Gain, beamwidth, sidelobe levels, input impedance, front-to-back, input connector and the like? What is important and what is not?
What research have you done besides posting the same question the twice? What are your conclusions? Did you find the reference materials suggested? Where did you look?
Once you lay out a foundation and show you have been working on the problem I expect that you will find the forum members particularly helpful.
Regards,
Azulykit