A four port directional coupler has 4 : 1 power splitting ratio and has dissipation loss of 3dB. The coupler directivity is 40dB. What fraction of input power P1 will go to ports P2 and P3?

A

$$P2 = 0.4 \times P1, P3 = 0.1 \times P1$$

B

$$P2 = 0.8 \times P1, P3 = 0.2 \times P1$$

C

$$P2 = 0.6 \times P1, P3 = 0.15 \times P1$$

D

$$P2 = 0.1 \times P1, P3 = 0.4 \times P1$$