Figure 3
From: Highly-efficient three-dimensional waveguide couplers using impedance-tunable transformation optics

The radial electric-field intensity of the coaxial waveguide coupler. (a) Input, (b) output.
From: Highly-efficient three-dimensional waveguide couplers using impedance-tunable transformation optics
The radial electric-field intensity of the coaxial waveguide coupler. (a) Input, (b) output.