A Dual-Band Single-Feed SWA by Cascading Waveguides for Unidirectional Radiation Patterns

This work presents an efficient dual-band slotted waveguide antenna (SWA-DB) design by cascading two SWA. Using a single excitation, the antenna is designed to produce unidirectional radiation patterns at 18 GHz and 24 GHz. The design and working principle are presented using numerical results by discussing the possibility of fabrication with 3D printing.