The Q10HF-3500S-SMA from Electro-Photonics is a Directional Coupler that operates from 2.5 to 4.5 GHz. It provides 10 ± 1.5 dB of coupling and has an insertion loss of 0.3 dB. The coupler can handle up to 50 W of CW input power, provides 16 dB of isolation, and has a VSWR of 1.2:1. It is available in a module that measures 27.94 x 21.59 x 15.75 mm with SMA-female connectors and is suitable for applications such as signal sampling, source leveling, signal isolation, power monitoring, and reflection measurement.