A power divider is also called a power splitter. And when rf power dividers are utilized in reverse, they can also be referred to as power combiners. Alongside of directional couplers, power dividers are essentially passive devices used predominantly the field of radio technology. A defined amount of electromagnetic power in a transmission line is being coupled onto a port. This allows one signal to be used within another circuit.

Directional couplers couple power flows in one direction only. Power enters an output port. It is coupled to an isolated port but not to a coupled port. The directional coupler will split power equally between two ports. This type of coupler is also known as a hybrid coupler. Directional couplers are built from two coupled transmission lines closely located to each other. This closeness allows energy to pass through from one outlet to the other.

It’s a process used at microwave frequencies. Here is where transmission line designs are used to produce numerous circuit elements. But lumped components can also be used, but at lower frequencies. At microwave frequency level, waveguide designs could be used. These guides correspond to conducting transmission line designs. There are many more applications to power dividers and directional couplers.

Such applications include the provision of signal samples for making measurements, combining feeds to and from antennas, antenna beam forming, providing taps for cable distributed systems, and separating transmitted and received signals on telephone lines. Scientific symbols are being used to identify the signals produced within couplers and dividers. One such example is that of the coupling factor identified with the mark of d B.

rf power dividers

Directional couplers favor four ports, including input, coupled, and transmitted ports. A final port is isolated. If not all four ports are used, three will suffice.