Patch antenna with slots

[khalidcawl]

hello does any help me how to design slots in patch antenna...when i finish designing single patch antenna i want to do two narraw slots so can any one help me how to calculate dimensions of slot and how to do these points in the CST

 

[ferdows]

see the papers of kay fung lee from Mississippi university

 

[khalidcawl]

thanks ferdows, i tried to get but still i cant get any paper talking about it...so would you help me.
thanks in advance.
khaled