Asymmetric full duplex communication including device power communication

A communication system comprising:

• at least one transceiver circuit;
• and
• a single-ended transmission medium including an inner conductor and a conductive shield layer,
• the inner conductor being coupled to the transceiver circuit by means of a first transmission line, and the conductive shield layer of the transmission medium being coupled to the transceiver circuit by means of a second transmission line,
• wherein a first impedance is coupled to the first transmission line for device power communication, the communication system being adapted for allowing DC current for the device power communication, and
• wherein the first impedance comprises four ferrite beads connected as twice a series of two ferrite beads, these series connections being coupled in parallel, and this parallel coupling being connected in series to an inductance.

A communication system comprising:

• at least one transceiver circuit;
• and
• a single-ended transmission medium including an inner conductor and a conductive shield layer,
• the inner conductor being coupled to the transceiver circuit by means of a first transmission line, and the conductive shield layer of the transmission medium being coupled to the transceiver circuit by means of a second transmission line,
• wherein a first impedance is coupled to the first transmission line for device power communication, the first impedance comprising at least one ferrite bead, the communication system being adapted for allowing DC current for the device power communication,
• the first transmission line comprises an AC coupling capacitor, wherein the first impedance is connected to the first transmission line between the AC coupling capacitor and the connection to the inner conductor of the single-ended transmission medium, and
• wherein the second transmission line includes an AC coupling capacitor and a termination resistor, wherein a second impedance is connected with a first lead to the second transmission line between the AC coupling capacitor and the termination resistor and is connected with a second lead to ground.