Microwave Measurements
Technical Elective for ECE
Catalog Data: 

(3) II Measurement techniques and the application of hardware and test equipment in the modern microwave laboratory.  P, ECE 381.

ECE 381A

Microwave Engineering, 2nd Edition, D. Pozar,  Addison-Wesley, 1998

Course Learning Outcomes: 
  1. Describe the basic principles of power measurement and be able to carry out high-frequency power measurements.
  2. Measure the effects of impedance mismatches on power transmission and the use of tuners for impedance matching.
  3. Describe the characteristics of isolators, directional couplers, circulators, and magic tees.
  4. Perform swept-frequency measurements and use of scattering parameters to characterize components. 
  5. Employ a Network Analyzer to measure the scattering parameters for rectangular waveguide and coaxial components. 
  6. Describe the theory behind spectrum analyzers and how they can be employed for investigating amplitude modulation, frequency modulation, and mixing. 
  7. Perform measurements of antenna impedance, bandwidth, wave polarization, and antenna-patterns.
  8. Use a time-domain reflectometer for the analysis of line parameter variations and mismatched loads.
Course Topics: 
  • Introduction to Microwave Power Measurements (2 Weeks) --- An introduction to microwave measurement equipment, basic principles of power measurement, square law operation of a crystal detector, and the use of a cavity wave meter.
  • Slotted Line Measurements (1 Week) --- Measurement of the magnitude and phase of reflection coefficients using a slotted line, the effects of impedance mismatches on power transmission, and the use of slide screws tuners for impedance matching.
  • Microwave Component Power Measurements (1 Week) --- Power measurements associated with passive elements (i.e., an isolator, directional coupler, circulator, and a magic tee).
  • Swept Frequency Measurements (2 Weeks)  --- Learn about swept frequency measurements and the use of scattering parameters for characterization of coaxial components (i.e., a filter and two couplers).
  • Network Analyzer Measurements (2 Weeks) --- Measurement of the scattering parameters for passive rectangular waveguide and coaxial components using a network analyzer.
  • Spectrum Analysis (2 Weeks) --- Use a spectrum analyzer to investigate amplitude modulation, frequency modulation, and mixing.
  • Antennas (2 Weeks) --- Investigate antenna impedance, bandwidth, and wave polarization.  Measurement of antenna patterns for dipole, Yagi-Uda, and rectangular horn antennas.
  • Time-Domain Reflectometry (2 Weeks) --- Use the time-domain reflectometer to analyze line parameter variations and mismatched loads.
Class/Laboratory Schedule: 

100 minutes of lecture per week.
170 minutes of laboratory experience per week.
Bi-weekly laboratory reports that include answering pre-lab questions.
Three in-class exams
A final examination

Relationship to Student Outcomes: 

a)  an ability to apply knowledge of mathematics, science, and engineering (Med.),
b)  an ability to (design and conduct experiments, as well as to) analyze and interpret data (High),
c)  an ability to design a system, (component), or process to meet desired needs (Low),
d)  an ability to function on (multi-disciplinary) teams (Low)
e)  an ability to identify, formulate, and solve engineering problems (Low)
g)  an ability to communicate effectively (High)
k)  an ability to use the techniques, skills, and modern engineering tools
     necessary for engineering practice (Med.).

Prepared by: 
Dr. Kathleen Melde
Prepared Date: 

University of Arizona College of Engineering