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5G and future antenna technology
Source:Original | Author:C&T RF Antennas Inc | Publish time: 2019-01-11 | 1845 Views | Share:

In addition, the antenna of 5G mobile communication faces a new problem - coexistence.

To achieve Massive MIMO, multiple antennas are required for transmission and reception, that is, multi-antenna (8-antenna, 16-antenna...). The biggest challenge for such a multi-antenna system to the terminal is coexistence.

How to reduce the mutual influence on the couple, how to increase the isolation of the channel... This puts new requirements on the 5G terminal antenna.

Specifically, it will cover the following three points:

Reducing the mutual influence, especially the different functional modules, the mutual interference between different frequency bands, which was not considered by the academic community before, but it does exist in the industry;

Decoupling, in MIMO systems, the mutual coupling of the antenna not only reduces the isolation of the channel but also reduces the radiation efficiency of the entire system. In addition, we can't expect to rely entirely on high-band millimeter-waves to address performance gains, such as 25GHz, 28GHz...60GHz.

De-correlation, which can be solved by the antenna and circuit design coordination, but the bandwidth of the solution is very limited by the circuit, and it is difficult to meet the bandwidth of all frequency bands.

Antenna technology for 5G systems

This includes the design of a single antenna and the technology at the system level, as mentioned above at the system level, such as multi-beam, beamforming, an active antenna array, Massive MIMO, etc.

 

From the perspective of specific antenna design, the technology developed by the metamaterial-based concept will be of great benefit. Metamaterials have been successful in 3G and 4G, such as miniaturization, low profile, high gain, and band.

The second is the substrate or package integrated antenna. These antennas are mainly used in the frequency band with high frequency, that is, the millimeter wave band. Although the antenna size in the high-frequency band is small, the loss of the antenna itself is very large, so it is preferable to integrate the antenna and the substrate integration or a smaller package on the terminal.