Figure 10
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

(a) Block diagram of the broadband hybrid coupler, (b) 3-D view, (b) top view (upper ground is removed for clear illustration).
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

(a) Block diagram of the broadband hybrid coupler, (b) 3-D view, (b) top view (upper ground is removed for clear illustration).