Balun is a three port device, or a broadband transmission line transformer that connects balanced and unbalanced transmission line circuits by converting matching inputs into differential outputs. The function of Barron is to enable the system to have different impedances or be compatible with differential/single ended signaling, and to be used in modern communication systems such as mobile phones and data transmission networks. Balun is composed of "balanced" and "unbalanced": balanced represents the differential structure
Unbalanced represents a single ended structure. The WIFI function on ONU devices requires the use of Balun circuits, either external or chip integrated. Here, Balun's role is to convert differential signals with strong anti-interference ability into single ended RF signals that can be radiated by the antenna. In the circuit, it ensures both the stability of signal transmission and the perfect radiation of the signal through the WIFI ONU antenna.
The Barron principle is based on antenna theory. A dipole antenna is a balanced antenna, while a coaxial cable is an unbalanced transmission line. If it is directly connected, there is high-frequency current passing through the skin of the coaxial cable (but according to the coaxial cable transmission principle, high-frequency current should flow through the cable, and the skin layer serves as a shielding layer), which will affect the radiation of the antenna. So we need to add an imbalance converter between balance and imbalance to achieve this
The above is a brief overview of Barron Circuit, which can be used as a reference for everyone. Our company has a strong technical team and can provide professional technical services for customers. At present, our company has diversified products: intelligent onu, communication optical module, optical fiber module, sfp optical module, olt equipment, Ethernet switch and other network equipment. If you need, you can understand them in depth.
