Does the design of the microstrip antenna in the high freque

Does the design of the microstrip antenna in the high frequencies (millimeter wave) increases the antenna bandwidth?

design antenna microstrip in the high freguencies dont increases the antenna bandwith. but production slot in patch increase antenna bandwith and this slot compact antenna microstrip.

you can make U-slot on the patchof different lengths, two lengths should resonate at two nearby frequencies, so that bandwith will increase