Design of a Slotted Waveguide Antenna Based on TE20 Mode in Ku-Band Suitable for Direct Metal Laser Sintering

This paper describes the design of a novel Ku-band slotted waveguide antenna (SWA), taking into consideration advantages and drawbacks using 3D direct metal laser sintering (DMLS) process. Indeed, DMLS process makes it possible to produce SWA with 64 radiating slots its feeding network in single monolithic However, considering lack accuracy process, whole must be completely thought out planned avoid sensitive dimensions. Coupling irises inside such structures are elements major sensitivity this regard, so waveguides present work were designed TE20 ones, avoiding kind iris. Thus, TE10 converter was implemented overall power supply structure an array made up four linear SWAs 16 each. Both elementary 16-slot complete manufactured DMLS. At resonant frequency 15 GHz, measured realized gain is 22.26 dB sidelobe levels below 10.1 dB. The reflection coefficient lower than ?12.6 at center frequency. These performances confirm proof concept.