Bandwidth-Enhanced Low-Profile Cavity-Backed Slot Antenna by Using Hybrid SIW Cavity Modes. - Luo, Guo Qing; Hu, Zhi Fang; Li, Wen Jun; Zhang, Xiao Hong; Sun, Ling Ling; Zheng, Jian Feng (IEEE Transactions on Antennas & Propagation, 2012)