BAL-0020SLG

Mixed mode scattering parameters are used to characterize differential circuits. For baluns, this means that the 0° and 180° ports become a single 100Ω differential port and the common port remains the same 50Ω common port. The two-port s-parameters of the balun are then characterized based on differential (d), common mode (c), or single-ended (s) signals. For example: Sds21 is the differential output response given a single ended input.

Sdd22: differential return loss of the differential port driven with a differential signal
Sdc22: differential return loss of the differential port driven with a common signal
Sds21: insertion loss from a single ended input to a differential output
Scc22: common mode return loss of the differential port driven with a common signal
Scd22: common mode return loss of the differential port driven with a differential signal
Scs21: insertion loss from a single ended input to a common output
Sss11: single ended return loss
Ssd12: insertion loss from a differential signal to single ended output
Ssc12: insertion loss from a common signal to single ended output

Three port scattering parameters measured as three single-ended 50Ω ports showing relationship between any two ports.