Figure 18

Electric field distribution: (a) 4.2 GHz, (b) 10.14 GHz, (c) 13.15 GHz, and (d) 17.1 GHz (CST STUDIO SUITE 2019, https://www.3ds.com/products-services/simulia/products/cst-studio-suite)42.
Electric field distribution: (a) 4.2 GHz, (b) 10.14 GHz, (c) 13.15 GHz, and (d) 17.1 GHz (CST STUDIO SUITE 2019, https://www.3ds.com/products-services/simulia/products/cst-studio-suite)42.