Chhattisgarh Swami Vivekanand Technical University, Bhilai
Semester : VII Branch: Electronics & Telecommunication
Subject: Microwave Communication & Engineering
Total Theory Periods: 40 Total Tutorial Periods: 12
Total Marks in End Semester Examination: 80
Minimum number of Class tests to be conducted: Two
UNIT – I
Sky wave: Surface wave; space wave: Field and Range Calculation. Ionosphere
Propagation –Refractive Index at High Frequencies. Mechanism of Radio Wave Bending, Critical Frequency.
Effect of Earth’s Magnetic Field. Effective Dielectric Constant and conductivity. MUF .Skip Distances.
Optimum Working Frequency. Multihop propagation .Ionospheric Abnormalities. Tropospheric Propagation.
Field Strength of Troposphere wave. Effect of Earth’s Curvature and Dielectric Constant. Tropospheric Scatter
and Duct propagation
UNIT – II
Microwave Linear Beam and Crossed-Field Tubes:
Failure of conventional tube at high frequency; Klystron-
Velocity modulation; Bunching; output power and loading; Reflex klystron-Velocity modulation; power output
and efficiency and electronic admittance; Helix traveling wave tubes; amplification process; Conventional
current; Electric field wave modes; Basic principle of coupled cavity; Magnetron-Types and Principles of
operation; Modes of oscillation; Strapping; pi-mode separation.
UNIT – III
Microwave Devices :
Transistors, Tunnel Diodes and Microwave FETs: Structure; Operation; Characteristics
and Power frequency limitations of microwave transistors; Tunnel diodes and Field-Effect Transistors. Transfer
Electron Devices: Gunn diode; Gunn effect; Principle and Mode of operation; Microwave generation and
amplification Tunnel Diode; PIN diode and Crystal diode. Avalanche Transit- Time Devices: Physical Structure;
Principle of operation; Characteristics; Power output and Efficiency of IMPATT, TRAPATT and BARITT
Diodes; Parametric amplifiers.
UNIT – IV
Microwave Components and Measurement:
Rectangular cavity resonators; Q of a cavity resonator;
Reentrant cavities; Slow-wave structure; Microwave hybrid circuits; S-parameters and their properties; Wave
guide tees ; Hybrid ring; Waveguide corners bends and twists; Two hole directional coupler; S- Matrix;
Circulators and Isolators; Hybrid couplers, MICROWAVE MEASUREMENT: Microwave bench; Precautions;
Power measurement; Bolometric method; Attenuation; VSWR; Impedance, Frequency and Q of the Cavity.
UNIT – V
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. Filter transformation and implementation.
Name of Text Books:
1. Microwave Devices and Circuits by Samuel Y. Liao, 3
Ed., Pearson Education
2. Foundations of Microwave Engineering by R .E. Collin, TMH Pub.
Name of Reference Books:
1. Microwave Principles by Reich
2. Microwaves, Gupta, New Age International Publishers
3. Microwave Semiconductor Devices, Roy & Mitra, PHI
4. D. M. Pozar:
, John Wiley, 1998, 2/e.
5. G. D. Vendelin, A. M. Pavio and U. L. Rohde:
Microwave Circuit Design
, John Wiley, 1990.
6. Guillermo Gonzalez,
Microwave Transistor Amplifiers: Analysis and Design
(2nd Edition), Prentice