RF Coupler – Model C8858 – Dual Directional Coupler is a High Power design. The unit operates with 40 dB Coupling, covers the full 10-1000 MHz band rated at 250 W CW. RF Coupler – Model C8858 supports military and commercial applications and operates with less than 0.4 dB of Insertion Loss and better than ± 0.5 dB of Coupling Flatness. The unit is available with all SMA-F mainline and coupled port connectors. Werlatone Directional Couplers are broadband Dual, Uni, and Bi-Directional. Above all, our high power designs tolerate the most harsh operating conditions associated with military and EMC testing environments.