What Is the Purpose of a Directional Coupler? Keenlion Answers with a 2-8GHz 40dB Model

A directional coupler samples RF power without disturbing the main signal. Our 2-8GHz 40dB directional coupler does exactly that – with low loss, high directivity, and 150W handling. Keenlion is the factory behind it, so samples and custom tuning come standard.

Why Do You Need a Directional Coupler?

The purpose of a directional coupler is simple: it picks off a small portion of forward power for monitoring, while leaving the main path almost untouched. Our 2-8GHz directional coupler achieves this with insertion loss under 0.4dB – your primary signal barely notices it. Directivity reaches 15dB, which means this directional coupler reads forward power cleanly, without being fooled by reflections. That matters when you are testing amplifiers or measuring transmitter output.

What Makes This Directional Coupler Stand Out?

Coupling is set at 40±1dB with flatness within ±1.3dB across 2-8GHz, so your sampled readings stay consistent from start to end of the band. Main line VSWR stays ≤1.4, secondary ≤1.6 – this directional coupler keeps mismatches low. Power rating? 150W CW and 200W peak. Connectors are SMA-K on the main line and SMP-J on the coupled port, a practical fit for modern RF systems. Silver paint and -40~+60°C operation mean this directional coupler survives both lab and field use.

Why Get It from Keenlion?

We manufacture this directional coupler ourselves. That means samples are ready for your evaluation. Need a modified directional coupler? We can adjust frequency, coupling value, or connectors to your exact spec. And because we skip distributors, our pricing on this directional coupler stays competitive. Contact Keenlion – we will send you a directional coupler that fits your system and your budget.

Si Chuan Keenlion Microwave a large selection in narrowband and broadband configurations, covering frequencies from 0.5 to 50 GHz. They are designed to handle from 10 to 30 watts input power in a 50-ohm transmission system. Microstrip or stripline designs are utilized, and optimized for best performance.

We can also customize directional coupler according to your requirements. You can enter the customization page to provide the specifications you need.
https://www.keenlion.com/customization/
E-mail:
sales@keenlion.com
tom@keenlion.com
Sichuan Keenlion Microwave Technology Co., Ltd.