Question

A two wire transmission line of characteristic impedance Z is connected to a load impedance ZL(ZL and Zo are not equal). Impedance matching cannot be achieved with (a) A quarter wavelength transformer (b) A half wavelength transformer (c) An open circuited parallel stub (d) A short circuited parallel stub The question was posed to me in final exam. Origin of the question is Advanced and Tricky Questions topic in division Advanced and Tricky Questions of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

Right option is (b) A half wavelength transformer For explanation: When the characteristic and load impedance are not same, a half wavelength transformer cannot be used for impedance matching because when l = wavelength/2, we get Zin = ZL.