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## EC6503 Transmission Lines and Wave Guides

Subject Informations :

University        :  Anna University
Department     :  B.E. ELECTRONICS AND COMMUNICATION ENGINEERING
Semester          :  05 th sem
Year                  :  03 th year
Regulation       :  R2013
Subject Code   :  EC6503
Subject Name  :  Transmission Lines and Wave Guides

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EC6503 Transmission Lines and Wave Guides | Important  Questions

### EC6503 TRANSMISSION LINES AND WAVE GUIDES – SYLLABUS – R- 2013

OBJECTIVES:

 To introduce the various types of transmission lines and to discuss the losses associated.
 To give thorough understanding about impedance transformation and matching.
 To use the Smith chart in problem solving.
 To impart knowledge on filter theories and waveguide theories

UNIT I TRANSMISSION LINE THEORY

General theory of Transmission lines – the transmission line – general solution – The infinite line –
Wavelength, velocity of propagation – Waveform distortion – the distortion-less line – Loading and
different methods of loading – Line not terminated in Z0 – Reflection coefficient – calculation of current, voltage, power delivered and efficiency of transmission – Input and transfer impedance – Open and short circuited lines – reflection factor and reflection loss.

UNIT II HIGH FREQUENCY TRANSMISSION LINES

Transmission line equations at radio frequencies – Line of Zero dissipation – Voltage and current on
the dissipation-less line, Standing Waves, Nodes, Standing Wave Ratio – Input impedance of the
dissipation-less line – Open and short circuited lines – Power and impedance measurement on lines –
Reflection losses – Measurement of VSWR and wavelength.

UNIT III IMPEDANCE MATCHING IN HIGH FREQUENCY LINES

Impedance matching: Quarter wave transformer – Impedance matching by stubs – Single stub and
double stub matching – Smith chart – Solutions of problems using Smith chart – Single and double stub matching using Smith chart.

UNIT IV PASSIVE FILTERS

Characteristic impedance of symmetrical networks – filter fundamentals, Design of filters: Constant K – Low Pass, High Pass, Band Pass, Band Elimination, m- derived sections – low pass, high pass
composite filters.

UNIT V WAVE GUIDES AND CAVITY RESONATORS

General Wave behaviours along uniform Guiding structures, Transverse Electromagnetic waves,
Transverse Magnetic waves, Transverse Electric waves, TM and TE waves between parallel plates,
TM and TE waves in Rectangular wave guides, Bessel’s differential equation and Bessel function, TM and TE waves in Circular wave guides, Rectangular and circular cavity Resonators.

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