Full duplex transmission with NearFi

NearFi – communication in real time

Full duplex transmission of all Ethernet protocols

Full duplex transmission, i.e., simultaneous transmission in both directions, is required in order to transmit real-time Ethernet protocols.

NearFi uses two 60 GHz connections (one uplink and one downlink) in parallel on separate frequency bands in order to enable full duplex mode.

This means that the technology is also suitable for future developments, such as TSN, OPC UA, etc.

Bit-oriented synchronous versus packet-oriented asynchronous transmission

Bit-oriented transmission is latency-free

Bit-oriented transmission

NearFi uses a synchronous bit-oriented transmission method. This allows contactless communication in real time, meaning that every Ethernet protocol is transmitted immediately.

All other radio transmission technologies to date rely on packet-oriented transmission. This always leads to considerable latency, as packets are first received, then repackaged and sent wirelessly. The wireless packet must be received at the receiver end, unpackaged, and output again. This process involves many asynchronous and latency-causing operations, which are completely eliminated by the innovative transmission technology from Phoenix Contact.

Diagram of inductive power transmission

Inductive power transmission via magnetic field

Inductive power transmission

Power transmission is inductive. The base coupler generates a magnetic field via a coil, which is induced in the coil of the remote coupler.

Active closed-loop control always selects the optimum parameters for transmission. This means that the power is kept at a constant 50 W over an operating range of a few centimeters.

Bluetooth, WLAN, and NearFi logos

Wireless technologies for every requirement

Coexistence with WLAN and other wireless technologies

NearFi is based on wireless 60 GHz communication in the near field at a very low range of a few millimeters.

Thus, as many NearFi systems as desired can be operated in parallel and can coexist alongside existing wireless technologies such as WLAN or Bluetooth without any interference.

Production hall with robots

NearFi technology in automotive production

Application in the automotive sector

Because NearFi transmits power and data across an air gap, transmission is extremely efficient and wear-free. Service actions and maintenance costs are reduced and system availability is increased. Therefore, the lower costs and optimized production processes significantly reduce the amortization period of the system.

A robot arm in automotive production that makes hundreds of mating cycles per day with its gripping tool is a particularly illustrative example of the wear and tear on connections. The service life of connectors is, however, limited, because the contacts can become soiled and warped. This leads to unplanned or unforeseeable production stoppages and regular maintenance intervals, the costs of which can quickly reach seven figures. With the new NearFi technology, connections subject to wear can be replaced easily.