The Nanjing Network Communications and Security Purple Mountain Laboratories has developed a CMOS millimeter-wave fully integrated 4-channel phased array chip, and completed the chip packaging and testing, Chinese Academy of Engineering academician Liu Yunjie said today.
According to Science and Technology Daily, the cost per channel was reduced from 1,000 yuan to 20 yuan.
At the same time, they packaged millimeter-wave large-scale active antenna arrays with an integrated 1024-channel antenna unit. The chips and antenna arrays are intended to be commercialized for 5G systems by 2022.
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 for 5G to be in the millimeter-wave band: 1) sub-6GHz is already very crowded, and all kinds of electronic devices are interconnected, and 2) there is no need to use millimeter-wave. Interference is severe.2) The millimeter-wave band provides a greater signal bandwidth than sub-6 GHz, and according to the Shannon equation The greater the bandwidth, the greater the channel capacity, and the higher the communication rates that can be supported.
Millimeter wave will also be used in 5G vehicle networking (V2X) to provide positioning services that far exceed the accuracy of GPS and LTE.
