# EC2305 TRANSMISSION LINES AND WAVEGUIDES PDF

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It gives the manner in the wave is propagated along a line and specifies the variation of voltage and current in the line as a function of distance. Also, a The attenuation constant should be made independent of frequency.

What is the range of values of standing wave ratio?

## EC2305 Transmission Lines and Wave guides QUESTION PAPER

What do you mean by copper insulators? A line for which the effect of resistance R is completely neglected is called dissipationless line. What is a dominant mode?

Derive the Q-factor of a rectangular cavity resonator? When the operating frequency is wavegujdes than the cut-off frequency, the propagation constant becomes real i.

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

Mention the dominant modes in rectangular and circular waveguides For a rectangular waveguide,the dominant mode is TE01 For a circular waveguide,the dominant mode is TE11 Resonant frequency of microwave resonator is the frequency at which the energy in the resonator attains maximum value.

Its application is to connect load to a source where they cannot be made adjacent. For coaxial lines it is necessary to use a length of line in which a longitudinal slot, one half wavelength or more long has been cut. The wave cannot be propagated.

What are the root values for the TM modes? Log In Sign Up.

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

The operating wavelength is 90 m. This is called impedance matching. What is the nature and value of Z0 for the dissipation less line?

Mention the applications of circular waveguide. Give examples The electromagnetic waves that are guided along or over conducting or dielectric surface are called guided waves. What is cut off frequency? State the relation between standing were ratio S and reflection co-efficient k. Homework 1 – University of St.

The parameters of a transmission line are: This is called double stub matching. Explain about half wave transformer? What are degenerate modes in a rectangular waveguide? A finite line is a line having a finite length on the line. The circle diagram may be used to find the input impendence of a line m of any chosen length. Why Double stub matching is preferred over single stub matching.

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.

Derive the expression for the resonant frequency of the circular cavity resonator? What is a finite line?

Transmission line resonator can be built using distributed elements like sections of coaxial lines. What are guided waves?

For the telephone cable to waaveguides distortion less line, the inductance value should be increased by placing lumped inductors along the line. Find the additional inductance to give distortion-less transmission.

The possible TM modes in a circular waveguide are: Explain about degenerate mode in rectangular wave guide? Which mode in a circular waveguide has attenuation effect decreasing with increase in frequency?