That means a device will use half as much radio spectrum compared to current systems.
The researchers designed and built a protoype full duplex transceiver architecture which cuts interference by over 100 million and uses low cost devices.
The researchers said the system could double the capacity of a wi-fi access points, while network operators could give the same network capacity using fewer base stations.
Leo Laughlin, one of the researchers, said: “Until now there has been a fundamental unsolved problem with radio communication. Since the radio spectrum is a limited resource, and with network operators paying billions of pounds to access the spectrum, solving this problem would bring us one step closer to the faster, cheaper and greener devices of our connected future.”
The researchers point out that in mobile devices right now, a separate filtering component is needed for each frequency band and consequently different devices are made for different parts of the world.
There aren’t any 4G phones capable of unrestricted global roaming but if manufacturers used the team’s duplexer circuit, one model could work across the whole world.