Topic: Electromagnetics
Magnitude of input impedance of a Η/8 lossless 50 Ή transmission line terminated with 25 Ή is:
- A. 100 Ή
- B. 25 Ή
- C. 50 Ή
- D. None of the above
Answer: C. 50 Ή
Explanation: For l = Η/8, Βl = ΐ/4. Z_in = Z_o * [(Z_L + j Z_o tan(Βl)) / (Z_o + j Z_L tan(Βl))]. Substituting values gives |Z_in| = 50 Ή.