Shuang Ji Jiro Hirokawa Takashi Tomura A Wideband and High-Gain All-Metallic Perpendicular-Corporate-Fed Multi-Layered Parallel-Plate Slot Array Antenna. 38000-38011 2022 10 IEEE Access https://doi.org/10.1109/ACCESS.2022.3165121 db/journals/access/access10.html#JiHT22