Breaking the “lack of core and soul”, my country successfully developed 5G millimeter wave chips

According to Science and Technology Daily, on June 15, Liu Yunjie, an academician of the Chinese Academy of Engineering, said that the Nanjing Network Communication and Security Purple Mountain Laboratory has developed a CMOS millimeter-wave fully integrated 4-channel phased array chip and completed chip packaging and testing, reducing the cost per channel from 1,000 yuan to 20 yuan. At the same time, they packaged a millimeter-wave large-scale active antenna array with 1,024-channel antenna units. The chip and antenna array will strive to be commercially used in 5G systems in 2022.

IT Home learned that the 5G frequency band is currently divided into two parts, one is sub-6GHz and the other is millimeter wave. There are two main reasons why 5G has to go to the millimeter wave band: 1) sub-6GHz is already very crowded, and various electronic devices interfere with each other seriously. 2) Compared with sub-6GHz, the millimeter wave band can provide a larger signal bandwidth, and according to the Shannon formula, the larger the bandwidth, the larger the channel capacity, and the higher the supported communication rate. In addition, millimeter waves will also be used in 5G vehicle-to-everything (V2X), providing positioning services with far higher accuracy than GPS and LTE.