ELT 281 Antennas and Transmission Lines

Lecture Hours: 2
Credits: 2

Covers the practical and theoretical aspects of basic transmission lines and antennas. Includes characteristics and properties of open-wire, coaxial, and special purpose transmission lines, plus those of vertical and horizontal antennas, and the coupling of source, transmission lines, and antennas. Promotes and supports sustainable and green technologies.

Prerequisite: ELT 244 and ELT 252, each with a grade of C or better; or consent of instructor.
Student Learning Outcomes:

Analyze properties of transmission lines with respect to length and frequency.
Describe the basic principles of operation of antenna systems.
Describe the nature behavior and propagation of radio waves.
Identify basic principles utilized in transmission line installation.

Content Outline

Transmission Lines
- Basic transmission lines
  - L, C, R, and G
  - Balanced
  - Unbalanced
  - Types
- Properties
  - Characteristic impedance
  - Propagation function
  - Reflection
    - Termination
    - VSWR
  - Fields
  - Skin effect
  - Radiation
- Coaxial lines
  - Uses
  - Construction
  - Limitations
- Open wire lines
  - Uses
  - Construction
  - Limitations
- Special purpose lines
  - Fiber optics
Antennas
- Basic characteristics
  - Radiation
  - Radiation resistance
  - Impedance characteristics
- Vertical antennas
  - Construction
  - Operation
  - Effect of ground
  - Feeds
  - Checks
- Horizontal Antenna
  - Construction
  - Operation
  - Effect of ground
  - Feeds
  - Checks
- Long wave antennas
- Short wave antennas
- Phasing
- Measuring equipment
Radio-Wave Propagation
- Electromagnetic waves
- Free-space propagation
- Reflection, refraction, and diffraction
- Terrestrial propagation
- Measurement techniques
- Software predictions
- Path profiles
Relation to Sustainable and Green Technologies.