7a)

b)

8 a)

b)

9 a)
b)

R5935 Pages: 2

b) Derive the expression of input impedance due to a transmission line terminated

(7.5) by a load .Also find the expression for SWR.

PARTC

(10)
Answer any two full questions, each carries 20 marks.

Derive the expression for r-circles and x-circles in Smith chart.

Determine ,assuming TE 10 mode of propagation ,the cut-off frequency, cut-off
wavelength, guide wavelength ,phase constant, phase velocity, group velocity
and wave impedance in the case of a hollow rectangular metallic waveguide of
dimensions 6cm and 3 cm ,respectively, when the applied signal frequency is
501/2

A 100 + 1150 Q load is connected to a 75 Q lossless line. Using Smith Chart,
find:

(i)T

(ii) s

(iii) The load admittance “ட்ட

(iv) Zin at 0.42. from the load

Obtain the waveguide solution to Maxwell’s wave equations

Explain single stub matching using analytical method.

A hollow rectangular waveguide has dimensions of a= 4cm and b= 2cm.
Calculate the amount of attenuation if the frequency is 3.5 GHz. Assume
dominant mode.

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