Question

Question4 (a) What two quantities differ in value in order for a signal to be reflected from the [396] (b) State precisely the terminating impedance of a transmission line for which the voltage reflection coefficient is: 3%] 3%] (ii) 1 In each case give a brief explanation in terms of the relations between the forward and reverse propagating voltages or currents. (c) In transmission line theory, what is a quarter wave transformer? Give one example of[5%] how one might be used. (d) An antenna presents an impedance of ZA needs to be matched to 50 Ω (70-Bor2 at its operating frequency, and On the Smith Chart provided. plot this impedance. Explain how the following two steps to solve this problem may be interpreted using lengths of line 3%] [396] Transforming Za to a real impedance R, (ie. a pure resistance) (ii) Transforming R to Z,-50Ω. (e) Without perfoming any calculations, illustrate the effect of your answer on your Smith [5%] chart by sketching in suitable trajectories of the impedance.

Answer 1

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c)