基于电力线通信的耦合器设计

Power line network is the most widely distributed network at present. If the power line network can be used as the communication network, it will break the limitations of communication media on the communication range and bring a huge breakthrough to the communication technology. In the power line communication system, the signal coupling module realizes the transmission and access of high frequency signals in the power line channel, which is the key part of the signal coupling module. The coupling devices mainly include capacitive coupler and inductive coupler. The selection of coupling mode is affected by the characteristics impedance and attenuation of the power line. The main purpose of this work is to couple the transmission signal into the power line with a low insertion loss.The inductance coupler is simulated by using CST modeling.By means of the non-contact inductance coupler, the carrier signals on the wire withlarge diameter are coupled into the onewith small diameter,and then enter the power line carrier handling veneer, so as to realize the coupled transmission of the signals.The structure model of the inductive coupler was established, in which the key technologies are the selection of magnetic core materials and the design of the coupler structure.