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Advance Communication System

MSBTE Course No. 17656 Branch: Electronics Group (EJ/ET/EX/EN/ED/EI)

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Overview

Topics Covered

Module 1. Wave Guide and Components [20M]

Contents:

1.1 Introduction to basics of microwave transmission [08M]

  • Microwave spectrum and band designations.
  • Comparison of wave guide with transmission line.
  • Rectangular waveguides: Propagation of waves through rectangular wave guide, Reflection of ...
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Module 1. Wave Guide and Components [20M]

Contents:

1.1 Introduction to basics of microwave transmission [08M]

  • Microwave spectrum and band designations.
  • Comparison of wave guide with transmission line.
  • Rectangular waveguides: Propagation of waves through rectangular wave guide, Reflection of waves from a conducting plane- Basic behaviour, dominant mode at the conducting surface, dominant mode of operation, plane waves at conducting surface, parallel and normal wavelength, phase velocity. The parallel plane waveguide, cut off wavelength, cut off frequency, group and phase velocity.(Simple numericals)
  • Rectangular waveguide modes: TEm,o modes, TEm,n modes, TMm,n modes, field patterns of TE1,0,TE2,0,TE1,1 modes.

1.2 Circular waveguide [04M]

  • Analysis of behavior
  • field patterns for dominant mode,
  • Advantages and applications of circular waveguide.

1.3 Waveguide components [08M]

  • Flanges, Rotating coupling, Bends & corners, Taper & Twist.
  • Multiple Junctions - E plane, H- plane and Hybrid junction.
  • Cavity resonators - operation, types and applications
  • Auxiliary components- Directional coupler, Isolator and circulators, Detector mounts, switches - Duplexer.

Module 2. Microwave Devices [20M]

Contents:

2.1 Microwave vacuum tube devices [12M]

Construction, working, specifications and applications of

  • Two cavity Klystron amplifier,
  • Reflex Klystron,
  • Magnetron
  • TWT

2.2 Microwave semiconductor devices [08M]

Construction, working and applications of

  • Gunn diode, .
  • IMPATT diode
  • PIN diode.
  • Tunnel diode

Module 3. Microwave Devices [16M]

Contents:

  • Basic block diagram of radar system.
  • Radar performance factors: Radar range equation, factors influencing max. Range, effect of noise.
  • Basic pulse Radar system: Block diagram & description.
  • Antenna scanning & Tracking (Definition, types and principle) of Antenna scanning: Horizontal, vertical, helical and spiral.
  • Antenna tracking: Sequential, conical and monopusl
  • Display Methods: A-Scope, PPI, Automatic target detection
  • Block diagram, operation and application of pulsed radar system and MTI and CW Doppler radar.
  • Radar Becons
  • Antannas used in RADAR

Module 4. Microwave Devices [16M]

Contents:

4.1 Introduction to satellite communication system [08M]

  • Importance of satellite communication system.
  • Concept of orbit & its types
  • Communication link : uplink & downlink frequency,
  • look angle altitude, elevation angle, Azimth angle footprint & station keeping
  • Block diagram and function of satellite earth station

4.2 Subsystems of satellite :Block diagram and Principle [08M]

  • Power subsystem
  • Communication channel subsystem
  • Attitude control subsystem
  • Thermal control subsystem
  • Telemetry tracking and command subsystem
  • Main & auxiliary propulsion subsystem
  • Antenna subsystem

Module 5. Theory of optics & fundamentals of optical fiber [12M]

Contents:

  • Optical spectrum: Band name and its range.
  • Definition & concept of reflection, refraction dispersion, diffraction, absorption & scattering with help of light theory
  • Definition of critical angle, Snell’s law, numerical aperture, acceptance angle, acceptance cone.
  • Advantages & disadvantages of Fiber Optic communication
  • Block diagram of Fiber Optic communication system

Module 6. Optical Communication System [16M]

Contents:

6.1 Types of fiber optics cable and its losses [08M]

  • Optical fiber types & characteristics.
  • Losses in optical fiber: Absorption loss,Scattering loss, Dispersion loss, Radiation loss, Coupling loss.

6.2 Optical sources and detectors [04M]

  • Optical sources: Edge emitter and Surface emitter LED, Laser construction & working principle, Comparison of different sources.
  • Photo Detector: Review of PIN photo diode, avalanche photo diode construction & working principle.

6.3 Splicers and connectors [04M]

  • Splicing techniques- Properties of splicing, fusion splice, V-groove splice and elastic tube splice. Fusion splice and V-groove splice
  • Fiber connector-properties of connector, ferrule connector

6.4 Attenuation measurements: OTDR block diagram, working principle, and OTDR trace

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