Dual frequency Slots in Microstrip patch antenna

Hi all.. can anyone help me designing a dua band microstrip antenna with the help of slots in the patch? which kind of slot should i design and any geometric dimensions of the slot which can decide my resonant frequencies?

Hey, in order to design dual band microstrip patch antenna, first of all you have to decide the type of patch element either rectangular, circular, square or triangular.
You also need to find some reference papers based on slot configurations and then you can choose either C slot, H slot or I slot in order to achieve your targeted frequencies.