Abstract: An Ethernet signal coupling device comprises: a primary side comprising TX+, TX?, RX+ and RX? signal terminals; a secondary side comprising TD+, TD?, RD+ and RD? signal terminals; a first transformer comprising a primary coil coupled to the TX+ signal terminal and the TX? signal terminal and a secondary coil coupled to the TD+ signal terminal and the TD? signal terminal; and a second transformer comprising a primary coil coupled to the RX+ signal terminal and the RX? signal terminal and a secondary coil coupled to the RD+ signal terminal and the RD? signal terminal. The primary coils of the first and second transformers are wound by triple insulated wires, or the secondary coils of the first and second transformers are wound by triple insulated wires.

Abstract: A broadband power line network device includes a printed circuit board, a power converter, a network control chip, a network connector, and an Ethernet signal coupling device. The printed circuit board includes a primary layout region and a secondary layout region. The primary layout region and the secondary layout region are separated from each other by a first distance. The power converter includes a pair of power-receiving terminals for receiving an AC voltage, thereby converting the AC voltage into a DC voltage. The network control chip is disposed on the primary layout region for receiving the DC voltage. The network connector is disposed on the secondary layout region for transmitting or receiving an external network signal. The Ethernet signal coupling device is arranged between the primary layout region and the secondary layout region.