The directional coupler is a device widely used in wireless communications and radio frequency systems. It is designed to distribute the signal evenly from one input port to two output ports, and the power of each output port is half the input power, that is. This type of coupler is often used to achieve balanced distribution and power distribution of signals.
The main working principle of the directional coupler is based on the principle of beam splitter. Its internal structure usually includes one main input port and two equally divided output ports. The input signal is evenly distributed to the two output ports through the internally designed coupling structure. Because the coupler has the characteristics of evenly distributing power, it has many applications in wireless communications and radio frequency systems.
For example, it is often used as a power divider in wireless communication systems: allocating input signals to multiple antennas or receivers to achieve balanced distribution and extraction of signals.