Topic: Electromagnetics
If the RF transmission is terminated in its Characteristic impedance $Z_{C}$, which of the following statements is wrong?
- A. The input impedance of transmission line becomes $Z_{c}$.
- B. The transmission line acts as an infinite long transmission line.
- C. The VSWR becomes one
- D. The VSWR becomes infinite
Answer: D. The VSWR becomes infinite
Explanation: If the RF transmission is terminated in its characteristic impedance $Z_{0}$ then $Z_{L}=Z_{0}$. Reflection coefficient $\Gamma=\frac{Z_{L}-Z_{o}}{Z_{L}+Z_{o}}=0$. $VSWR=\frac{1+\Gamma}{1-\Gamma}=1$. Therefore, VSWR becoming infinite is the wrong statement.