The ZDDC20-K1844 from Mini Circuits is a Space Qualified Coupler with an operating frequency range of 18-40 GHz. This dual-directional coupler has a coupling of 20 dB and a coupling flatness of +/- 0.3-0.7 dB. It has a mainline loss of 0.6-1.4 dB and a directivity of 10-23 dB. The coupler has a return loss of 11.7-28 dB (In & Thru) and 11.7-25 dB (coupling). It has a power handling capacity of up to 20 W and requires a DC current supply of 0.63 A. This RoHS-compliant wideband coupler has a mass of 85 g with 2.92 mm female connector and is ideal for 5G, mobile, fixed satellite, and lab applications.