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E1133 Pages: 2

Derive an expression for net outward power flow associated with an
electromagnetic wave, from a surface.

State phase velocity of a wave

Draw the circuit of small section of transmission line of length Ax and label the
circuit parameters

Derive the current and voltage equation of a transmission line.

A lossless transmission line has primary constant L= 0.01uH/m, C=100pF/m. Find

the characteristic impedance of the line.

PART C
Answer any two full questions, each carries 20 marks.
What are distributed elements
Derive the expression for input impedance of a loss less transmission line

A transmission line has primary constants R=0.1Q/m, G=0.01/m, L=0.01H/m

and C=100pF/m. Find the characteristic impedance of the line at 2 GHz. Find the

following
i) Reflection coefficient at the load end when it is connected to a load
impedance 10+j20Q.
ii) The reflection coefficient at a distance of 20cm from load.

Derive the expressions for Transverse magnetic (TE) mode propagation in a
parallel plane wave guide.

A load impedance 90- j 25 is to be matched to 50Q using single stub matching
find the length and location of stub using smith chart.

Derive the expressions for TE mode in a rectangular wave guide

The longitudinal electric field for TM11 mode is given by

Ez = आग 5510 89 € 72 V/m Find the cut off frequency of the mode.

The cross section of a rectangular wave guide is 20 cm *5 cm. Find 3 lowest order

mode frequencies

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