Distributed Amplifier Performance

David Pozar Microwave Engineering Example 12.8

Use (12.79) to calculate the gain of a distributed amplifier from 1 to 18 GHz
for N = 2, 4, 8, and 16 stages. Assume Zd = Zg = Z0 = 50 ohm and the following
FET parameters: Ri = 5 ohm, Rds = 250 ohm,Cgs = 0.30 pF, and gm = 30 mS.
Find the optimum value of N that will give maximum gain at 16 GHz.