The CC 20-BQB-(***-***)-B-(**) from The Waveguide Solution is a Waveguide Coupler with Frequency 18 to 26.5 GHz, Coupling 20 dB, 30 dB, 40 dB, Directivity 20 dB. Tags: Crossguide Coupler. More details for CC 20-BQB-(***-***)-B-(**) can be seen below.