Design of a bidirectional impedance-adapting transformer coupling circuit for low-voltage power-line communications

Abstract

In this paper, the design of an impedance-adapting bidirectional transformer coupling circuit for low-voltage powerline communications is described. It is shown that transmission through the transformer is governed by series resonance of the leakage inductance and coupling capacitance. At low frequencies though, the magnetizing inductance plays an important role in filtering the power waveform. The coupling transformer, if properly designed, can equalize terminating impedances on either side for maximum power transfer. Furthermore, these equalized terminating impedances facilitate symmetrical bidirectional band-pass transmission.

Research of transceiver system based on wireless communication radio frequency technology

“…For ease of control, choose the right frequency input voltage source at the same time. Next, design and build the baseband circuit, the down-conversion circuit, and the RF front-end circuit [7]. The amplifier and the filter form the RF front-end circuit, the centimeter, the phase shifter and the mixer form the down-conversion circuit, and the baseband circuit is composed of two branch lines cascaded with the baseband amplifier and the channel selection low-pass filter, and the circuit infrastructure.…”

Design of Bidirectional Coupling Circuit for Broadband Power-Line Communications

“…Coupling circuits for power line communication (PLC) are available with pass band of maximum 150 KHz which includes CENELEC B, CENELEC C and CENELEC D bands [1,2]. If power line communication system is designed for higher frequencies it will be the cheapest medium for high speed internet access.…”