We will be looking at plane waves for which the wave equation is onedimensional and appears as follows. Waves can exist traveling independently in either direction on a linear transmission line. Electrostaticscoulombs law and electric field intensity fields due to continuous charge distributions, electric flux density, gauss law and its applications, electric potential, relations between e and v, maxwells two. Basic ideas steady states determining time constant determining transient amplitude transmission lines basics re. Page 33 page 38 page 73 page 77 page 78 page 93 page 94 page 116. Introduction to transmission lines and waveguides a transmission line is a device designed to guide electrical energy from one point to another. To introduce the student to the fundamental theory and concepts of electromagnetic waves and transmission lines, and their practical applications, to study the propagation, reflection, and transmission of plane waves in bounded and unbounded media. This unit is designed to enable candidates to understand the basic principles and concepts of transmission lines and complex waves. Transmission lines and em waves electronics and communication engineering course from iit bombay nptel lecture videos by prof. Debapratim ghosh department of electrical engineering. Lines because lo and co do not depend on frequency for a superconductor, the phase velocity is independent of frequency. If you find any issue while downloading this file, kindly report about it to us by leaving your comment below in the comments section and we are always there to rectify the issues and eliminate all the problem. It will be shown later, when we consider transmission lines from the electromagnetic fields point of view, that these voltage and current waves correspond to em waves, also.
Whenever there is a mismatch of impedance between transmission line and load, reflections will occur. Transmission lines and wave propagation, fourth edition. Electromagnetic theory can be thought of as generalization of circuit theory. Electromagnetic waves and transmission lines unit1 electromagnetic theory is a prerequisite for a wide spectrum of studies in the field of electrical sciences and physics. Traveling waves, the measureable electromagnetic field solutions of maxwells. Introduction to em waves and various techniques of. Also, the amount of attenuation is extremely small, since this is due to ro. In the era of high speed computers, where data rates are approaching to few gbsec, the phenomena related to the electromagnetic waves, like the bit distortion, signal reflection, impedance matching play a vital role in high speed communication networks. Co 2 describe the characteristics of electromagnetic waves in. Transmission lines and waveguides ebookpptpdf download. Shevgaonkar, dept of electrical engineering, iit bombay for more details on nptel visit.
In this chapter, we will study the transmission line characteristics in greater detail, such as the line behaviour with di. Em fields in a waveguide or transmission line are e j z. In a sense, all transmission lines function as conduits of electromagnetic energy when transporting pulses or highfrequency waves. Co 2 describe the characteristics of electromagnetic waves in medium. Assume having perfect dielectric insulator and the wire have perfect conductivity with no loss example. Study time varying maxwells equations and their applications in electromagnetic. Em waves and transmission lines ppt, full notes, ebooks. Applications of electromagnetic waves, transmission lines, maxwells equations, uniform plane wave, plane waves at a media interface, waveguides, dielectric waveguides, radiation, antenna arrays, propagation of radio waves. An antenna is a device which can launch and receive electromagnetic waves efficiently. Transmission line theory different types of transmission lines, definition of characteristic impedance, the transmission line as a cascade of tsections, definition of propagation constant. Am 10 a transmission line, which has neither frequency distortion nor phase distortion is called a distortion less line. Vlf, lf, hf, vhf, uhf, microwave 16 hrs 88 b definition and physical concepts of the. These waves travel along the line with the velocity equal to velocity of light if line losses are neglected. Bridge course to practical aspects of engineering electromagnetics for entering graduate students and senior undergraduate students.
Traveling wave solutions of a diffusive seir epidemic model with nonlinear incidence rate zhao, lin, zhang, liang, and huo, haifeng, taiwanese journal of mathematics, 2019. Waveguides may be thought of as conduits for electromagnetic energy, the waveguide itself acting as nothing more than a director of the energy rather than as a signal conductor in the normal sense of the word. Standing waves and resonance chapter 14 transmission lines pdf version. These videos are provided by nptel elearning initiative. Excellent course helped me understand topic that i couldnt while attendinfg my college. Sep 11, 2019 therefore, such lines have four distributed parameters, series resistance, inductance shunt capacitance and conductance.
This course deals with the principles of electromagnetics at high frequencies. It is used, for example, to transfer the output rf energy of a transmitter to an antenna. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Concept of polarization of em waves, electromagnetic spectrum and its various ranges. So that a pulse will propagate down a superconducting transmission line without dispersing. Either the voltage v or the current i as in waves in a transmission line or the electric field e or magnetic field h as in electromagnetic waves in free space or 2 2 2 2 2 a a1.
Upon successful completion of the course, students will be able to a. Electronics transmission lines and em waves youtube. Electromagnetic waves and transmission lines, and their practical applications b. This energy will not travel through normal electrical wire without great losses. Chapter 3 introduction to transmission lines and waveguides a transmission line is a device designed to guide electrical energy from one point to another. Ec6503 transmission lines and waveguides v semester 2 marks department of electronics and communication engineering 111 10. Nptel provides elearning through online web and video courses various streams.
Sendingend port a a b b transmission line generator. Em waves and transmission lines ppt, full notes, ebooks hi can u post the book electromagnetic waves and transmission lines by u. The effect of capacitance is ignored in these lines, length of short transmission line is less than 80 km. The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance. Nonlinear stability of periodic traveling waves of the bbm system hakkaev, sevdzhan, communications in mathematical analysis, 20. To study the propagation, reflection, and transmission of plane waves in bounded and unbounded media. May 11, 2018 travelling wave on transmission line is the voltage current waves which propagate from the source end to the load end during the transient condition.
Transmission lines and em waves online course video. General solution of the transmission line, the two standard forms for voltage and current of a line terminated by an impedance, physical significance of the equation and the infinite line, the two standard. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas they are then called feed. Transmission lines and em waves video lectures nptel. Transmission lines and wave propagation, fourth edition helps readers develop a thorough understanding of transmission line behavior, as well as their advantages and limitations. Introduction to em waves and various techniques of communication. Developments in research, programs, and concepts since the first edition presented a demand for a. Travelling wave on transmission line is the voltage current waves which propagate from the source end to the load end during the transient condition. Electromagnetic theory and transmission lines pdf notes. The bifurcations of traveling wave solutions of the kundu equation yi, yating and liu. There are certain situations that can be handled exclusively in terms of field theory. Higher national unit specification general information for centres unit title. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses. Transmission lines and waveguides are utilized to transfer electromagnetic waves carrying energy and information from a source to a receiver choice of the line technology depends on the purpose, e.
Waveguides transmission lines electronics textbook. Airline draw the transmission line model and find c. If the incident signal is a continuous ac waveform. Noc transmission lines and electromagnetic waves nptel. Traveling waves and power waves building a solid foundation for microwave circuit theory m icrowave equivalentcircuit theory is like a grand old building. Therefore, such lines have four distributed parameters, series resistance, inductance shunt capacitance and conductance. The course will involve hands on programming to visualize most aspects of electromagnetics and transmission lines. Transmission lines and em waves nptel online videos. Dielectricdielectric and dielectricmetal interfaces, fresnel coefficients,brewsters. Introduction to em waves and various techniques of communication by nptelhrd. Shevgaonkar department of electrical engineering iit bombay. In radiofrequency engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account. Dec 31, 2007 lecture series on transmission lines and e.
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