Designin a circular patch antenna with tilted radiation beam

Hi,

I would like to design a circular patch antenna with tilted radiation beam capability for my project. Is there any recommended techniques that I can use? As far as I know, the conventional patch antenna normally have the broadside radiation pattern (maximum radiation normal to the patch, along z-axis)

I have searched thru the internet and I found that most of them are in array forms. However, for my project, I only can use a single patch structure.

Please advise. Thanks.