Hi Experts, I have downloaded two Balun S parameter models(.s3p) from manufacturer website. Port definitions are shown below, Balun 1 Port 1: unbalanced input(50 ohm) Port 2 and port 3: balanced output (50 ohm) Balun 2 Port 1: unbalanced input(50 ohm) Port 2 and port 3: balanced output (100 ohm) How to find insertion and return loss for these 3 port models? Thanks, Sukumar ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu