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E192056 Pages:2

Derive the equation of input impedance of a transmission line due to line
terminated by a load .

Derive the expression of characteristic impedance of transmission line

Show that Brewster angle does not exist for a non magnetic medium for
perpendicular polarization

A lossless transmission line has a characteristic impedance of 50Q and phase
constant of 3 Rad/ m at 100 MHz. Find Inductance per meter and Capacitance per

meter of the transmission line .

PART C
Answer any two full questions, each carries 20 marks.
Explain single stub matching .
For a load impedance of 60 — 18002 , design a single stub short circuit shunt tuning
network to match this load to a 50Q line using smith chart .
A 50 + j200 Q load is connected to a 100Q lossless transmission line . Using smith
chart , find
i. Reflection coefficient at load

1. VSWR

iii. | Load admittance

iv. Input impedance at 0.2 ۸ from the load

v. Reflection coefficient at 0.2 from the load

Explain the propagation of Electromagnetic wave in a rectangular waveguide
Derive the expression for Electric and magnetic field intensities for TM mode of

propagation of rectangular waveguide.

A rectangular wave guide has a dimension of 3cm x 5cm , and is operating at a
frequency of 10 GHz . Calculate the cutoff wavelength, cutoff frequency , guide
wavelength , phase velocity and group velocity . and the wave impedance for
TE10 mode.

Derive expression for length and position of stub for single stub tuning method

using Analytical method.

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