What is a Directional Coupler

A directional coupler can be a great device to use when power needs to be both divided and distributed. A directional coupler is an electronic device that has four port circuits. One port is separated from the input and the other is a through port. The device takes the signal that is passed through and then distributes it. There are a variety of different uses for a directional coupler. They are a very important component of microwave systems.

Although a coupler is a small device, it is not a simple process that it undertakes. The device has to specific in the input/output ratio. It also has to meet many requirements exactly in order to function correctly. The ratio that is used for the input/output process is called the coupling ratio. This ratio varies based upon what the coupler is being used for. For most devices, it is desirable for them to be both matched and lossless. This ensures that it is working properly and will not cause any problems further down the road. The coupler only uses a small portion of the power from the signal. This is because, the math for more than this is basically impossible.

It is also highly desirable for a coupler to have a high directivity, wide bandwidth, and good impedance. There are more than one type of coupler, depending upon what exactly needs to be accomplished. Some examples are single, coaxial, and dual directional couplers. There are even some that are made up of a combination of different types. Directional couplers can even be designed based upon a variety of different needs, allowing an electronic device to function at a continuous level. Werlatone has a complete line of directional couplers that are sure to suit your needs, whatever they may be.