Tokyo Tech researchers have designed and fabricated a tiny, fast, reliable and accurate 28-GHz transceiver meant for stable high-speed 5GAbove –

The fabricated transceiver only measures 3 mm × 4 mm and consists of four transmitting and receiving elements. The subcomponents of TRX1 are displayed.

Most state-of-the-art transceivers designed for 5G employ RF phase shifters. Accurate phase shifting is important because it allows the transceiver to guide the main lobe of the radiation pattern of the antenna array; in other words, it is used to "point" the antenna array towards a specific direction so that both communicating ends (transmitter and receiver) exchange signals with the highest power possible. However, using RF phase shifters brings about certain complications and does not quite make the cut for 5G.

The data rate they achieved was approximately 10 Gb/s higher than that achieved with other methods, while maintaining a phase error and gain variations an order of magnitude lower.