S-Parameters – Return (RL) & Insertion Loss (IL)

Measure 2-port S-parameters with our advanced TDR systems for comprehensive characterization of linear networks. Gain deep insights into signal reflection, transmission, and coupling behaviors—essential for designing and validating high-speed communication and RF systems.

SeunisPro screenshot illustrating various diagram formats for S-parameter measurements. SeunisPro screenshot illustrating various diagram formats for S-parameter measurements.
Meaningful one-click PDF reports can be easily created — shown here for coaxial cable insertion (IL) and return loss (RL) measurement. Meaningful one-click PDF reports can be easily created — shown here for coaxial cable insertion (IL) and return loss (RL) measurement.
Time domain gating reveals the true return loss (RL). Time domain gating reveals the true return loss (RL).
High-frequency PCB showing a bandpass filter built from distributed line elements. High-frequency PCB showing a bandpass filter built from distributed line elements.
S-parameter measurement of an RF bandpass filter using TDR technology. S-parameter measurement of an RF bandpass filter using TDR technology.
Full 4×4 single-ended S-parameter matrix measured using QTDNA technology. Full 4×4 single-ended S-parameter matrix measured using QTDNA technology.
Example RF circuitry where input and output return loss (RL) are measured using TDR. Example RF circuitry where input and output return loss (RL) are measured using TDR.

Which S-parameters can be measured?

  • Single-ended » return loss, insertion loss
  • Differential » return loss
  • Differential insertion loss » See mixed-mode S-parameters

Which DUTs can be measured?

  • PCBs » Real physical PCBs
  • Cables » all kinds of cables up to 1km
  • Connectors » all kinds of connectors and adapters
  • Entire systems » e.g. with PCBs, interconnects, cables
  • Signal types » single-ended, differential
  • RF components » filters, couplers, baluns

Which TDR is best suited for your DUT?