5G: There is already a transceiver for higher frequency bands

Deepak Gupta June 28, 2022
Updated 2022/06/28 at 2:31 PM

For the development of 5G, at European level, frequency bands with different characteristics were identified, allowing the provision of services and applications of different natures. The frequency ranges are 700 Mhz, 3.6 GHz and 26 GHz, but there are others that are not effectively used due to technological limitations (example 39 Ghz).

A transceiver was recently announced that can be used in the higher frequency bands of 5G networks.

5G: Transceiver can be used in the 39 Ghz frequency range

A new phased-array beamformer for the millimeter wave (mmWave) band of 5G was recently developed by researchers at Tokyo Tech and NEC Corporation.

Its innovative design applies two well-known techniques - the Doherty amplifier and digital pre-distortion - a phased-array to mmWave transceiver and overcomes the issues of conventional designs, producing exceptional power and area efficiencies and outperforming other high-end 5G transceivers. .

Some frequency bands assigned to 5G are not effectively used due to technological limitations. These frequency bands include the 39 GHz New Radio (NR) band, but actually ranges from 37 GHz to 43.5 GHz, depending on the country.

The NR band offers notable performance advantages over other lower frequency bands that 5G networks use today. For example, it enables ultra-low latency in communication, along with data rates in excess of 10Gbps and massive capacity to accommodate multiple users.

However, these feats come at a cost. High-frequency signals are quickly attenuated as they travel through space. It is therefore crucial that the transmitted power is concentrated in a narrow beam directed directly at the receiver. This can, in principle, be achieved using phased-array beamformers, transmission devices composed of a carefully phased array of antennas. However, working in the high frequency regions of the NR band decreases the efficiency of power amplifiers, as they tend to suffer from non-linearity problems, which distort the transmitted signal.

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