Quantic PMI Model No. QC-1G18G-SFF-50W is a Hybrid Coupler that operates over the frequency range of 1.0 to 18.0 GHz and has an insertion loss of 2.3 dB, an isolation of 15 dB Min, a VSWR of 1.6:1, an amplitude balance of ±0.8 dB Max, a phase balance of ±8° Max, and an input power of 50 Ω. Unit has SMA female connectors in a housing measuring 3.74" x 1.16" x 0.43". 

https://www.pmi-rf.com/product-details/qc-1g18g-sff-50w