The application of directional coupler

Directional coupler, a passive device used in radio technology.The application of directional coupler as below:

1) For power synthesis systems.

In the multi-carrier frequency synthesis system, a directional coupler with 3dB is usually used. (generally called 3dB bridge)

2) For receiver’s anti-interference measurement or stray measurement.

In the FR test and measurement system, if the tested device is a receiver, usually through the coupled end of the directional coupler, an adjacent interference signal can be injected into the receiver, and then the receiver anti-interference performance can be tested through a comprehensive tester connected to the direct end of the directional coupler.

3) For signal sampling and monitoring.

The online measurement and monitoring of the transmitter may be one of the most extensive applications of directional couplers.

4) For online measurement of power.

A directional coupler is a very important device in power measurement technology.