Description

A directional coupler designed for the 150–1000 MHz frequency range is a passive RF component that enables signal sampling without significantly disturbing the main transmission path. It typically features four ports: input, output, coupled, and isolated. When an RF signal enters the input port, most of the power continues to the output, while a small, defined portion—determined by the coupling factor (e.g., 10, 20, or 30 dB)—is diverted to the coupled port. This allows engineers to monitor forward or reflected power, perform VSWR measurements, or inject signals into a system for testing or feedback control. High directivity (≥ 20 dB) ensures that only signals traveling in the intended direction are coupled, minimizing interference from reflections. With low insertion loss (typically < 0.5 dB), excellent VSWR (≤ 1.2), and power handling capabilities up to 200 watts, these couplers are ideal for use in RF test setups, communication systems, and drone detection or jamming platforms where precise signal control and monitoring are essential.