For port to be reflection free in a series adaptor, we require
That is, the port's impedance must equal the series combination of the other port impedances at the junction. This result can be compared with that for the parallel junction in §F.2.2.
The series adaptor has now been derived in a way which emphasizes its duality with respect to the parallel adaptor.
Extracting Physical Quantities
Physical Derivation of Series Reflection Coefficient