Microwave Electronics

Last semester given: 2017-2018 Spring

Next semester to be given: 2020-2021 Fall

Textbook:D. Pozar “Microwave Engineering” 4. Edition, Wiley

There are bi-weekly five homework assignments.

Moodle is used as the tool to provide the communication among students and also with the instructor.

AWR is used as the CAD tool of the course.

In Spring 2016, the students designed and fabricated RF amplifiers using a discrete transistor in the 360MHz to 2.1GHz range similar to the one shown in the figure. PCB boards were designed using AWR layout tool. Students measured the S-parameters, noise figure, P1dB and P3rd of the amplifier they built. They learned to use a network analyzer, a noise figure meter and a spectrum analyzer. In the final stage of the project, the amplifiers designed by different students were combined to form a single-conversion transmitter and a single-conversion receiver.

380MHzAmp

In the Spring of 2018, the project was about designing a low-noise or high-gain amplifier using a BJT (BFU520W). Each student had a different frequency range (450MHz to 1450MHz) with 10% bandwidth. The students designed the PCB using AWR layout tool after designing the amplifier using the same tool. Students measured the S-parameters, noise figure, P1dB and P3rd of the amplifier they built.

Subjects covered:

  1. High frequency effects, lumped/distributed elements
  2. Transmission lines, microstrips
  3. Smith Chart, use of CAD tools
  4. S-parameters, signal flow modeling
  5. Matching circuits
  6. Power gain equations
  7. Amplifier stability, stability circles
  8. Constant gain circles
  9. Noise, noise figure and noise temperature
  10. Noise in transistors and amplifiers, constant noise figure circles
  11. Noise in amplifiers and constant noise figure circles
  12. Bias circuits, wide band amplifiers, balanced amplifiers
  13. Detectors, mixers
  14. PIN switches, attenuators