- #1
Calculate the characteristic impedance (Z0) of the two port network shown below:
In this example :
R1 = 40 ohm
R2 = 40 ohm
R3 = 20 ohm
V1 = I1 (R1+R2)
Then, Z11 = V1/I1 = R1+R3 = 40+20 = 60 ohm
V2 = V1 (R3 / R1+R3) = I1 (R3+ R1) (R3 / (R1+R3)) = I1 R3
Then, Z21 = V2 / I1 = R3 = 20 ohm
Am I correct so far?
I found the way to calculate T network, where Zor is a characteristic impedance
Zoc= R1 + R2 = 40 + 20 = 60Ω
Zso = (R1 * R2 ) /( R1 + R2 ) + R1
Zso= (40 + 20) / (40+ 20 ) + 40
Zso= 800/ 60 + 40 = 13.333+ 40 = 53.333Ω
Zor= √ Zoc Zsc = √60 + 53.333= √ 113.333 = 10.645 Ω
I hope im on right path this time