Topic: Electromagnetics
The disadvantage of single stub matching is that
- A. every load needs a new stub position
- B. only shunt stub should be used
- C. only resistive load can be matched
- D. useful only in two wire transmission line
Answer: A. every load needs a new stub position
Explanation: Single stub matching is popular in matching fixed impedances at microwave frequencies. But it is not suitable for matching variable impedances. A change in load impedance results in a change in the length as well as the location of the stub, so every load needs a new stub position.