The DCZ-02E/Y from Elmika is a Waveguide Coupler with Frequency 110 to 170 GHz, Coupling 3 dB, 6 dB, 10 dB, 15 dB, 20 dB, Directivity 30 to 35 dB, Insertion Loss 2.5 dB. Tags: Directional Coupler, Dual Directional Coupler. More details for DCZ-02E/Y can be seen below.