Directional Coupler: PDC-192212-6-20W-SFF is a

Quantic PMI Model No. PDC-192212-6-20W-SFF is a Directional Coupler with a frequency range of 19.2 to 21.2 GHz, a 0.77 dB insertion loss, a 1.25:1 VSWR, a 19 dB directivity, a 6 ± 0.18 dB coupling, and a 0.06 dB coupling sensitivity. This model has 2.92mm female connectors in a housing that measures 1.10" x 0.67" x 0.43". https://www.pmi-rf.com/product-details/pdc-192212-6-20w-sff