500 Element Active Antenna System Operates at 28 GHz

NEC Corporation has developed a prototype of a massive-element (approximately 500 elements) Active Antenna System (AAS) for base stations that support the 28 GHz band. The system has been for 5G Applications.

NEC's simulation trials of the newly developed AAS, which adopts beamforming, a technology for transmitting radio waves in multiple directions (to objects) while simultaneously using many antenna elements, achieved up to one kilometer in long-distance communications in 16 respective directions at 28 GHz with a data rate of 30 Gpbs. The system also had a spectral efficiency 20 times greater than LTE on a per-communication area basis. In addition, NEC claimed that their technologies helps save several dozen watts of power and reduces the size systems by approximately 50%.

The need for high-speed and high-capacity communication services is growing in pace with the distribution of 4K/8K video and the spread of new technologies such as augmented reality and virtual reality. It is important to build a mobile network that supports services based on these technologies, utilizing high frequency bands and beamforming. NEC has achieved the creation of a power-saving and compact-size AAS by leveraging circuit design technologies such as component mounting and heat radiation, which it has accumulated over the years through the development of microwave communication systems on high frequency bands.