Physics · Electromagnetic Waves
Scattering parameters (S-parameters) are more suited than impedance parameters (Z-parameters) to describe a waveguide junction because:
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- 1scattering parameters are directly measurable at microwave frequencies using traveling waves, whereas open and short circuit conditions required for Z-parameters are difficult to achieve✓
- 2impedance parameters vary over unacceptably wide ranges in waveguides
- 3the scattering matrix is always unitary for lossy networks
- 4scattering parameters are frequency invariant whereas impedance parameters vary with frequency
Correct answer
scattering parameters are directly measurable at microwave frequencies using traveling waves, whereas open and short circuit conditions required for Z-parameters are difficult to achieve
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