The HHM22139A2 from TDK is a Directional Coupler that operates from 698 to 2620 MHz. It has a coupling factor of 25 dB, an insertion loss of less than 0.11 dB and provides an isolation of up to 49.7 dB. The coupler is available as a surface mount package that measures 1.6 x 0.8 x 0.6 mm.
