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Consider the following statements: As compared to short-circuited stubs, the open-circuited stubs are not preferred because the latter 1. Are of different characteristic impedance 2. Have a tendency to radiate Which of the above statements is/are correct?

Consider the following statements: As compared to short-circuited stubs, the open-circuited stubs are not preferred because the latter 1. Are of different characteristic impedance 2. Have a tendency to radiate Which of the above statements is/are correct? Correct Answer 2 only 

In a transmission line, to match the complex load to the transmission line stub matching is used.

There are two types of stub matching:

  • Short circuit stub
  • Open circuit stub


These stubs can be connected to the transmission line either in series or parallel with a fixed distance from the load.

  • Generally short-circuit stubs are more preferred compared to the open circuit stub, because open-circuit stubs may radiate as their ends are open.
  • Characteristic’s impedance of stub and line should be the same.

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Where, Z0 = characteristics impedance of transmission line (Ω)

d = distance of stub from load end (m)

L = length of the stub (m)

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