The FPC07182 from Knowles is a Symmetrical Directional Coupler that operates from 20 to 40 GHz. It has a coupling value of 8.5 to 11.5 dB, an insertion loss of under 1.5 dB and directivity of over 10 dB. The coupler is available in a surface mount package that measures 1.651 x 1.27 x 0.254 mm.