Unprecedented growth in the application of microwave has taken place during the last two to three decades, especially in mobile communication, TV transmission, industrial/domestic applications, satellite communication, telemetry, RADAR/navigational aids, etc. This rapid development in the microwave and that of digital technologies has synergised, leading to further accelerated growth rate. This has created an increased demand for trained engineers, in civilian as well as in defence organizations.
This book meets the complete need of the students of engineering courses, i.e. B.S., B.E., M.S., M.Tech., M.Sc., in various countries. However, the students need to have prior knowledge of electromagnetics. The special features of this book are as follows: (a) It contains fundamental concepts and principles behind microwave engineering explained in a student-friendly lucid language, keeping a balance between physical and analytical approaches, (b) contains a large number of solved and unsolved problems after every chapter, for developing practical knowledge, (c) has around 400 figures, with special effort put in, for giving realistic numerical values in the graphs/dimensions of the components and devices, for getting a real feel and visualisation of that device, which is missing in many text books, and (d) has 15 important experiments, giving full theory, procedures, precautions, and sample readings and observations as expected in each experiment, followed by quiz/viva questions for the benefit of the students and the instructors.
This book consists of 12 chapters along with an annexure giving related constants and finally an index. Chapter 1 introduces the subject along with the behaviour of lumped components L, C, and R at microwave frequencies, microwave heating mechanism, concept of CW/pulsed signals, decibel, anechoic chamber, EMI/EMC, radiation hazards, etc. Chapter 2 summarizes the basics of wave propagation in different modes/cut-off frequencies, etc., in transmission lines and waveguides. It also touches a bit on microstrip lines. Impedance matching covering Smith chart using single and double stub has also been given. Chapter 3 covers cavity resonators of various types and their tuning and coupling. Chapter 4 describes a variety of components like T, directional couplers, isolators used in microwave circuits. Chapter 5 firstly covers limitations of conventional tubes and then various microwave tubes, e.g. klystron tube, magnetron, TWT, used as oscillators and amplifiers. Chapter 6 covers six types of transistors and eight types of diodes, with their working as oscillators and amplifiers. Chapter 7 presents measurement techniques of important parameters and related instruments. Chapter 8 covers theory of microwave propagation in space and through a microwave antenna. Chapter 9 deals with working of various types of RADARs. Chapter 10 introduces filter design theory and design techniques giving emphasis on microstrip line filters, which can be verified by using standard software, e.g. ADS. Chapter 11 gives basic concepts of RF amplifiers, oscillators, and mixers using Smith charts for stability considerations. Chapter 12 presents 15 simple laboratory experiments of the undergraduate level, along with conventional guidelines for students.
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