Figure 7
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

Double-box ideal hybrid coupler. (a) Basic schematic, (b) scattering parameters, (c) phase difference between output ports (Φ (S21)–Φ (S31)).
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

Double-box ideal hybrid coupler. (a) Basic schematic, (b) scattering parameters, (c) phase difference between output ports (Φ (S21)–Φ (S31)).