The BBTLine_Coupler1_SMP from BBTLine is a SMP-Connectorized Bi-Directional Coupler that operates from 0.8 to 6 GHz. This coupler has a coupling value of 19 dB, directivity of over 20 dB, insertion loss of under 0.8 dB and a return loss of 19 dB. It can handle up to 20 watts of power at 3.55 GHz.