Fujitsu Research Institute announced on June 9, 2015 that it has developed a technology to reduce inter-beam interference in multi-beam environments that use millimeter-wave frequencies. This technology is developed for the 5th generation mobile communication system (5G) that is expected to be commercialized around 2020. With respect to 5G communication, applications for obtaining continuous large bandwidth millimeter waves are highly anticipated. However, the millimeter wave has a strong straight line and is easily attenuated, so it is not suitable for long-distance communication. In order to solve this problem, Fujitsu discussed the method of using an array antenna made up of many antenna elements to form a narrow beam and increase the communication distance by increasing the signal gain. In addition, it is also intended to use a feature that can form a narrow beam to spatially separate a plurality of beams and increase the communication capacity by using a multiplexing method that simultaneously communicates with a plurality of terminals. However, the problem with the previous beamforming technology is that large beams (sidelobes) are also formed in a direction different from the target direction (main lobe) in which the communication target terminal is located, and these beams interfere with other main lobes. This time, the Fujitsu Institute has developed a 64-element array antenna that uses the 60GHz band. By improving the power supply circuit and increasing the output power of the center antenna element, the power is reduced toward the periphery, thereby suppressing the occurrence of side lobes. Compared to the original method in which the power density is the same in all antenna elements, the power difference between the main lobe and the side lobes is increased by 7 dB (5 times) (increased by 13 dB to a difference of 20 dB). In addition, the use of such an antenna achieves a total communication capacity of 12 Gbit/s (3 Gbit/s per user) when four users do not interfere with each other. (Reporter: Middle truth) Container House,Container House For Workshop,Foldable Container House,Container House For Apartment HEBEI KAYI BUILDING MATERIAL TECHNOLOGY CO.,LTD , https://www.kayigrating.com
Newly developed array antenna