Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure
Wu Guo-Cheng, Wang Guang-Ming, Fu Xiao-Long, Liang Jian-Gang, Bai Wei-Xiong
       

(color online) Simulated and measured normalized radiation patterns at broadside radiation (9.9 GHz) in (a) E plane and (b) H plane.