Subject Name: Microwave Engineering Subject Code EEC 603Date of Handout : Max MarksDate of Submission :

Assignment #2

Q.1 For circular waveguide having an internal diameter of 15 cm. Calculate cut-off

frequencies for (i) TE21 mode when the root of the Bessel function is 3.05 (ii) TM12

mode when the root of Bessel function is 7.02.

Q.2 A loss less parallel strip line has a conducting strip width w. The substrate

dielectric separating two conducting strips has a relative constant ε rd of 6 (beryllia

or beryllium oxide BeO) and a thickness d of 4 mm. Find out the required width w

of the conduction strip in order to have a characteristic impedance of 50ohm and

also calculate the strip line capacitance.

[Hint: Refer to chapter 11 of “Microwave devices and circuit” by “S.Y.Liao” ]

Q.3 What do you mean by microwave cavities? Describe the Rectangular cavity

resonator.

Q.4 An air filled cylindrical waveguide has diameter 7.5cm at frequency 5 GHz.

What mode will this guide transmit at TE type? Given x'01 = 3.832, x'11 = 1.841, x'21

= 3.054, x'31 = 4.201.

Q.5 Discuss the excitation of modes in rectangular and circular waveguide.

Q.6 Write short note on microstrip line.[Hint: Refer power point presentation on

planar transmission lines]

Vishesh Jain