The CC 10-BQB-(***-***)-B-(**) from The Waveguide Solution is a Waveguide Coupler with Frequency 2.6 to 3.95 GHz, Coupling 20 dB, 30 dB, 40 dB, Directivity 20 dB. Tags: Crossguide Coupler. More details for CC 10-BQB-(***-***)-B-(**) can be seen below.