Question: Show that in the indefinite scattering matrix given in (1.6.34) the sum of the coefficient of any row is equal to 1 and the sum of the coefficient of any column is equal to 1.
I1+ = I1- + I2- + I3-
Therefore, it follows that
S11 + S21 + S31 = 1
The circuit shown in Fig. P1.23b can be used to show that the sum of the coefficients in any row is equal to 1.
![963_1.23.png](https://secure.tutorsglobe.com/CMSImages/963_1.23.png)
![1951_1.23 b.png](https://secure.tutorsglobe.com/CMSImages/1951_1.23 b.png)
![121_1.6.34.png](https://secure.tutorsglobe.com/CMSImages/121_1.6.34.png)