r_integration

0.9r_air

radius of the integral arc

α

30˚

sector angle of the integral line

L_integration

α/180πr_integration

length of the line integration

W_port

L_antenna/20

width of the port

L_port

5W_port

length of the transmission part

Z_char

50 [ohm]

characteristic impedance of the port

D_PML

c₀/2f₀

thickness of the perfectly matched layer

Area

$\sqrt{3}$ (L_integration)²/4

area of the “horn”