create polar array of elements in hypermesh

Hi all,

i am fresher in hypermesh. Want to create polar array of elements for my model( model is cyclic symmetric, number of sectors in model is 18, that is each sector is subtends 20 degree angle ). Right now , just duplicating the original elements of one sector and rotating them. but problem is i need to again duplicate the new elements and rotate same. is there a way to create polar array?

Thanks in advance