Question

A two – wire transmission line of characteristic impedance Z0 is connected to a load of impedance ZL (ZL ≠ Z0). 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

Answer 1

Correct option (b)A half – wavelength transformer

Explanation:

If ZL ≠ Z0 Then, impedance matching can be achieved by

(i) a quarter wavelength transformer (λ/4).

(ii) an open – circuited parallel stub.

(iii) a short – circuited parallel stub.

Half wave length transformer (λ/2) cannot be used for impedance matching