Description

A passive RF component used to sample or "couple" a portion of the signal traveling through a transmission line without interrupting the main signal flow. It provides a defined coupling factor (e.g., -10 dB, -20 dB), directing a fraction of the power to a secondary port for monitoring, measurement, or feedback purposes. Directional couplers are essential in applications like power measurement, system monitoring, signal distribution, and antenna systems, offering high isolation and low insertion loss across a wide frequency range.