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Derive the expression for attenuation of TE10 waves in rectangular wave guide? What are nodes and antinodes on a line? The frequency at which the wave motion ceases is called cut-off frequency of the waveguide.

How the resonator is constructed at low frequencies? What is a TEM wave or principal wave? Waveguides usually take the form of rectangular or circular cylinders because of its simpler forms in use and less expensive to manufacture. A line, which has neither frequency distortion nor phase distortion is called a distortion less line.

Determine the solution of electric and magnetic fields of TM waves guided along rectangular wave — guides? CharacteristicImpedance Propagation Constant Since the line constants R, L, C, G are distributed through the entire length of the line, they are called as distributed elements. Define dominant mode for a circular waveguide. What are the types of cavity resonators? When a signal having many frequency components are transmitted along the line, all the frequencies will not have equal attenuation and hence the received end waveform will not be identical with the input waveform at the sending end because each frequency is having different attenuation.

The points along the line where magnitude of voltage or current is zero are called nodes while the the points along the lines where magnitude of voltage or current first maximum are called antinodes or loops. Resonant frequency of microwave resonator is the frequency at which the energy in the resonator attains maximum value.

## EC2305 Transmission Lines and Wave guides QUESTION PAPER

Its application is to connect load to a source where they cannot be made adjacent. What is a distortion less line?

Derive the field strength or equation in cylindrical co — ordinates systems? Explain about waveform distortion and distortion less line condition? Lumped loading is the process of increasing the inductance value by placing lumped inductors at specific intervals along the line, which avoids the distortion It is the process of using sections of continuously loaded cables separated by sections of unloaded cables which increases the inductance value What are the methods used for constructing a resonator?

Write down the significance of this line? A smooth line is one in which the load is terminated by its characteristic impedance and no reflections occur in such a line. A short circuited e2c305 may be solved by determining its admittance.

What is cut-off wavelength? Assuming leakage conductance to be nil, deduce an expression for attenuation and phase constant without neglecting R. Find the following for the TE1o made z 1 Cutoff frequency 2 Phase and group velocity.

What are the wavegujdes modes for TM waves in a circular waveguide? Also discuss the application of quarter wave line?

### ECTransmission lines and wave guides – Lecture Notes – Mohanavalli Edition

What is the condition for a distortion less line? At very high frequencies transmission line resonator does not wavegudes very high quality factor Q due to skin effect and radiation loss.

Define wave impedance and write the expression for wave impedance of TE waves in rectangular guide. They are also called as primary constants. What are the types of loading? Parallel plate wave guide consists of two conducting sheets separated by a dielectric material.

If the meter provides linear indications, S is readily determined. In ordinary telephone cables, the wires are insulated with paper and twisted in pairs, therefore there will not be flux linkage between the wires, which results in negligible inductance, and conductance. Transmission line resonator can be built using distributed elements like sections of coaxial lines. Discuss in details about inductance loading transmidsion telephone cables waveguuides derive the attenuation constant and phase constant and velocity of signal transmission for the wabeguides loaded cable?

Continuous loading is the process of increasing the inductance value by placing a iron core or a magnetic tape over the conductor of the line.

At low frequencies upto VHF MHzthe resonator is made up of the reactive elements or the lumped elements like the capacitance and the inductance. The quality factor Q is a measure of frequency selectivity of the resonator.

### EC Transmission Lines and Waveguides question bank download:Exams n Results

Derive the TE wave components in circular wave guides using Bessel functions? Why circular waveguides are not preferred over rectangular waveguides? It is also called as flat line.

Double stub matching is preferred over single stub due trajsmission following disadvantages of single stub. This is called double stub matching. What is an infinite line?

Give reason for an open line not frequently employed for impedance matching. Some of the higher order modes, having the same cut off frequencyare called degenerate modes. State the expressions for inductance L of a open wire line and coaxial line.

Calculate the cut-off wavelength, the guide wavelength and the characteristic wave impedance for the TE mode.