Fig. 15
From: Extremely wideband ridge gap waveguide-based 3-dB coupler using supershaped coupling apertures

Simulated S-parameters of back-to-back transitions from ridge gap waveguide to coaxial line.
From: Extremely wideband ridge gap waveguide-based 3-dB coupler using supershaped coupling apertures

Simulated S-parameters of back-to-back transitions from ridge gap waveguide to coaxial line.