microstrip flat lens with polarization diversity in x band

lenses are often used to converge electromagnetic wave namely they convert incident phase front of feed antenna to a flat phase front. together, the lens and the feed create an electrically large aperture antenna. flat lenses provide the cost and weight benefits of the reflect-arrays, while maintaining the advantages of a lens antenna. these lenses use an array of unit-cells which are excited by the feed and make transmit array with spatial feed. in this article we introduce a microstrip flat lens with polarization diversity. generating a circularly-polarized beam whit linearly-polarized element uses sequential rotation method which is also used in this article and a lens with polarization diversity is achieved.