Dual Polarised Antenna

Hi, I am looking at a dual polarised (+/-45deg) patch antenna for 2.5GHz band. This gives me a 65deg 3dB BW but I am looking to get a 90deg 3dB BW also. I am hoping this is possible with out having to decrease the width of the ground plane. Has anyone experience with patch designs giving 90 deg beamwidths?

thanks in advance

can u attaced me the design..i'm also doing the same project but my design is using inset fed technique...if possible i can help u..