VidaRF is offering VDC-05180-XX SMA Directional Couplers operating from 0.5 to 18GHz. It is available with coupling value of 10dB, 20dB and 30dB and can handle up to 50Watts of RF power.

VDC05180A10 0.5-18GHz 10dB directional coupler VDC05180A20 0.5-18GHz 20dB directional coupler
VDC05180A30 0.5-18GHz 30dB directional coupler

Broad Band Low Magnetic Field Coaxial Isolators Power Dividers 0.698-2.700 GHz