The JCSM37K75T39K25 from JQL Electronics is an RF Circulator that operates from 37.75 to 39.25 GHz. It has an insertion loss of less than 1.2 dB and an isolation of over 18 dB. The circulator can handle 2 W of forward/reverse power and has a VSWR of less than 1.35:1. This RoHS-compliant circulator is available in a surface-mount package and it should be mounted on the non-magnetic carrier or base. To ensure proper electrical and thermal performance, there must be a ground plane with a 100% solder connection underneath the part.