EC8651 – NOTES & QP
EC8651 – SYLLABUS
UNIT I TRANSMISSION LINE THEORY
General theory of Transmission lines — the transmission line — general solution — The infinite line — Wavelength, velocity of propagation — Waveform distortion — the distortion-less line — Loading and different methods of loading — Line not terminated in Z0 — Reflection coefficient — calculation of current, voltage, power delivered and efficiency of transmission — Input and transfer impedance — Open and short circuited lines — reflection factor and reflection loss.
UNIT II HIGH FREQUENCY TRANSMISSION LINES
Transmission line equations at radio frequencies — Line of Zero dissipation — Voltage and current on the dissipation-less line, Standing Waves, Nodes, Standing Wave Ratio — Input impedance of the dissipation-less line — Open and short circuited lines — Power and impedance measurement on lines — Reflection losses — Measurement of VSWR and wavelength.
UNIT III IMPEDANCE MATCHING IN HIGH FREQUENCY LINES
Impedance matching: Quarter wave transformer — Impedance matching by stubs — Single stub and double stub matching — Smith chart — Solutions of problems using Smith chart — Single and double stub matching using Smith chart.
UNIT IV WAVEGUIDES
General Wave behavior along uniform guiding structures — Transverse Electromagnetic Waves, Transverse Magnetic Waves, Transverse Electric Waves — TM and TE Waves between parallel plates. Field Equations in rectangular waveguides, TM and TE waves in rectangular waveguides, Bessel Functions, TM and TE waves in Circular waveguides.
UNIT V RF SYSTEM DESIGN CONCEPTS
Active RF components: Semiconductor basics in RF, bipolar junction transistors, RF field effect transistors, High electron mobility transistors Basic concepts of RF design, Mixers, Low noise amplifiers, voltage control oscillators, Power amplifiers, transducer power gain and stability considerations.