2K6 EC 702: MICROWAVE ENGINEERING
Module I (13 hours)
Introduction- Introduction to TE & TM Modes, Dominant Modes – Resonators – Rectangular and Circular wave guideresonators. Klystrons – Re-entrant cavities, Velocity modulation, Bunching (including analysis), Output power and beam loading, Reflex Klystron, , Admittance. Traveling wave tubes – Slow wave structures, Helix TWT, Amplification process, Convection current, Axial electric field, Wave modes, Gain consideration. Magnetron oscillators – Cylindrical magnetron, Cyclotron angular frequency, Power output and efficiency.
Module II (14 hours)
Microwave hybrid circuits – Waveguide tees, Magic tees, Hybrid rings, Corners, Bends, Twists. Formulation of S-matrix. Directional couplers – Two hole couplers, S-matrix of a directional coupler. Circulators and isolators. Microwave Network Analysis – Equivalent voltages and currents, Impedance, Impedance and Admittance matrices, scattering matrix, The transmission matrix. Signal flow graphs. Impedance matching and tuning – Matching with lumped elements, Single stub tuning, Double stub-tuning.
Module III (12 hours)
Solid state microwave devices – Microwave bipolar transistors – Physical structures, Power-frequency limitations. Principle of operation of Tunnel diode, MESFET. TEDs – Introduction Gunn diodes – Gunn oscillation modes. Avalanche Transit Time Devices – Introduction, IMPATT and TRAPATT Diodes Principle of Operation and Characteristics.. Measurement of Microwave power, Frequency and Impedance.
Module IV (13 hours)
Microwave filters – Periodic structures – Analysis of infinite periodic structures and terminated periodic structures, Filter design by image parameter method – Constant k, m-derived and composite. Filter design by insertion loss method. Filtertransformation and implementation. Microwave amplifiers and oscillators – Amplifiers – Gain and stability, Oscillator design – Basics
Text Books:
1. Samual Y Liao,”Microwave devices and Circuits”,2nd edition,Prentice Hall of India
2. Robert E. Collin: Foundation of Microwave Engineering, Mc. Graw Hill.
References:
1. David M Pozar : Microwave Engineering, 2nd Edn., John Wiley & Sons (Asia) Pvt. Ltd.
2. Wayne Tomasi : Advanced Electronic Communication Systems, PHI, (Chap. 7), 5th Ed, Pearson Education, 2001
3. K. C. Gupta : Microwaves, New Age International.
4. Sitesh Kumar Roy, Monojit Mitra : Microwave Semiconductor Devices, PHI – 2003