The PE-W28CP003-20 from Pasternack Enterprises Inc is a Waveguide Coupler with Frequency 26.5 to 40 GHz, Coupling 20 dB, Directivity 30 dB, Insertion Loss 0.6 dB. Tags: Directional Coupler, Multihole Coupler. More details for PE-W28CP003-20 can be seen below.