RF Coupler – Model C8991 – Dual Directional Coupler is a High Power design. The unit operates with 30 dB Coupling, covers the full 0.01-1000 MHz band rated at 50 W CW. RF Coupler – Model C8991 supports wide band EMC applications and operates with less than 1.2 dB of Insertion Loss and better than 0.5 dB of Coupling Flatness. The unit is available with a variety of 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.