Topics Covered

H.F transmission lines, Smith chart, Impedance matching techniques and applications. Guided E.M. waves, Parallel plane and Rectangular waveguides, Cavity resonator. Antennas and radiation, Small current element antenna, Long straight antenna, Radiation patterns and gain. Frequency Independent and Logperiodic antennas. Antenna arrays: Broadside and Endfire array, Phase scanning of Antennas arrays. Transit time effects, Velocity modulation, Microwave tubes: Klystron amplifier, Multicavity Klystron amplifier, Reflex Klystron oscillator, Magnetron Oscillator, Traveling Wave Tube Amplifier (TWTA), Backward Wave Oscillator(BWO). Transmission lines: Voltage and current in ideal transmission lines, reflection, transmission, standing wave, impedance transformation, Smith chart, impedance matching and lossy transmission lines. Waveguides: general formulation, modes of propagation and losses in parallel plate, rectangular and circular waveguides. Microstrips: Structures and characteristics. Rectangular resonant cavities: Energy storage, losses and Q. Radiation: Small current element, radiation resistance, radiation pattern and properties, Hertzian and halfwave dipoles. Antennas: Mono pole, horn, rhombic and parabolic reflector, array, and Yagi-Uda antenna.