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This book has been written for undergraduate students of Electronics & Communication Engineering and its subject matter covers the syllabuses of most of all Microwave and Radar Engineering core courses offered by different universities in the country. Its first chapter discusses the microwave propagation through waveguides. The second chapter describes microwave cavity resonators. Third chapter deals with microwave components. Chapter four explains various microwave measurements. The chapter five discusses limitations of conventional active devices at microwave frequencies and introduces various microwave tubes and their classification. Chapters 6, 7 and 8 describe microwave tubes. Microwave semiconductor devices have been discussed in chapters 9 to 11. Microwave and their applications are described in Introduction. Radar Engineering has been discussed in chapters 12 and 13. Authors have taken special care in keeping a balance between mathematical and physical approach. Large number of illustrative diagrams have been incorporated. A good number of solved problems, from university examination papers have been included for reinforcing the key concepts. Table of Contents Introduction Propagation through Waveguides Microwave Cavity Resonators Microwave Components Microwave Measurements Introduction to Microwave Tubes Microwave Tubes: Klystrons and Reflex Klystrons Microwave Tubes: Helix Travelling Wave Tube and Backward Wave Oscillator (BWO) Microwave Tubes: Magnetrons Microwave Semiconductor Devices: Tunnel Diodes Varactor, Parametric Amplifiers and p-i-n Diodes Microwave Semiconductor Devices: IMPATT and TRAPATT Diodes Microwave Semiconductor Devices: Gunn Devices Principles of Radar Radar Transmitters and Devices.