Figure 13
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

(a) Fabrication of the proposed broadband PRGW coupler, (b) TRL calibration kit, (c) measurement setup.
From: Analysis and design of ultra-wideband PRGW hybrid coupler using PEC/PMC waveguide model

(a) Fabrication of the proposed broadband PRGW coupler, (b) TRL calibration kit, (c) measurement setup.