The power divider is also defined as a power splitter. When installed to work in reverse, rf power dividers could also be referred to as power combiners. Along with directional couplers, power dividers are generally speaking, passive devices utilized predominantly in the field of radio technology. A defined amount of electromagnetic power within a transmission line needs to be coupled to a port.
This allows the produced signal to be used in another circuit. It is necessary for directional couplers to couple power emanating from one direction only. The produced power that enters an output port is coupled to an isolated port but not to the coupled alternative. The directional coupler has been specifically designed to split power in equal parts between two ports. Such a coupler is also known as a hybrid coupler.
Directional couplers are more often than not made from two coupled transmission lines. These lines are set closely so that energy can pass easily enough from one coupler to the other. This is a technique that is preferred in cases where microwave frequencies occur. This is a design where transmission line designs are often being used to conduct numerous circuit elements. But lumped component devices can operate at lower frequencies.
One example of the low frequency emitter is that of the audio frequency experienced in telephony. At microwave frequencies, waveguide designs could be used. Waveguide couplers are matched with one of the conducting transmission line designs. Many applications can respond to directional couplers and power dividers. Such applications will include the provision of a signal sample for the purpose of measurement or monitoring, feedback and combining feeds to and from antennae.
Antennae can be beam forming. They provide taps for cable distribution systems common to cable TV.