Since we're computing a Radar Cross Section, we also need to add a planewave source. For this example, we will specify a TMz planewave with θ = 135 degrees, φ = 0 degrees, or:
k = sqrt(2)/2 x - sqrt(2)/2 z :<math> \hat{k } = sqrt{2}/2 \hat{x } - sqrt{2}/2 \hat{z } </math>
===Mesh Settings===