Coupler I believe many people have heard of it. What is it? In fact, it is a device that transfers power between systems. In microwave systems, it is often necessary to divide one channel of microwave power into several channels in proportion, which is the issue of power allocation. The components that achieve this function are called power distribution components or couplers, which mainly include directional couplers, power distributors, and various microwave branching devices. These components are typically linear multi port reciprocal networks. In machinery, the device that connects the shafts of the driving device and the driven device is called a coupler. The main advantage of the coupler is that the signal is transmitted in one direction, with complete electrical isolation between the input and output terminals. The output signal has no impact on the input terminal, strong anti-interference ability, stable operation, contactless, long service life, and high transmission efficiency.

Optical coupler is a new type of device developed in the 1970s and widely used in electrical insulation, level conversion, interstage coupling, drive circuits, long-distance signal transmission, pulse amplification, solid-state relays (SSRs), instrumentation, communication equipment, and microcomputer interfaces. In a single chip switching power supply, a linear coupler can be used to form an optocoupler feedback circuit, which can adjust the control terminal current to change the duty ratio, achieving precise voltage stabilization.

Main functions of coupler：

The main function of the coupler is to proportionally divide one channel of microwave power into several channels in a microwave system, mainly to achieve power distribution.

Principle: Couplers are radio frequency devices that extract a small portion of signals from the wireless signal backbone channels. They are power distribution devices like power splitters, but the difference is that couplers are unequal power distribution devices.

Couplers and power splitters are used together to achieve the goal of evenly distributing the transmission power of the signal source to each antenna port of the indoor distribution system as much as possible, so that the transmission power of each antenna port is basically the same.