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News

5G core new technology for RF coaxial connectors

Author: Date:12/21/2019 1:56:56 AM
   In the future 5G construction process, RF coaxial connectors are indispensable in various fields, while millimeter wave, small base station technology, Massive MIMO and beam type technology are derived from the 5G speed increase demand, new multi-carrier technology Be inevitable. Technological innovation trends can double performance.
 

   One of the core technologies: millimeter wave

   According to experts from the International Telecommunication Union, there will be bands of 30-60 GHz or higher in the future. According to the communication principle, the higher the carrier frequency, the larger the bandwidth that can be established (meaning the faster the transmission rate). For example, the experimentally tested 28 GHz band in the world is based on a wavelength equivalent to the speed of light divided by the operating frequency. 10.7 mm, ie millimeter wave. Electromagnetic waves have distinct characteristics, and the higher the operating frequency (the shorter the wavelength), the more severe the attenuation. Therefore, the use of high frequency bands in 5G will greatly reduce its coverage. The antenna size is proportional to the wavelength of the frequency band, and the millimeter wave antenna is also small in size, so it is easy to configure multiple millimeter wave antennas on the mobile terminal to improve communication quality.

   Core Technology 2: Small Base Station

   The high-frequency electromagnetic wave attenuation is relatively serious, the propagation distance is short, and the small base station is small in volume and large in number, relative to the macro base station. It can be flexibly installed anywhere, even hidden in every corner of the street, fully integrating people's clothes, food, shelter and transportation. The scene requires improved signal stability and continuity.

   The third core technology: massive MIMO and beamforming technology

   MIMO (Multiple Input Multiple Output) is multiple input multiple output, and the antenna array is arranged such that each pair of antennas can transmit information independently. A plurality of transmitting antennas and receiving antennas are used at the transmitting end and the receiving end, respectively, and the channel capacity is increased without adding spectral resources. Traditional MIMO systems are only available for eight antenna ports. Massive MIMO system antennas will reach hundreds or even thousands. The target receiver will modulate each beam, and the signal isolation will not interfere with the interference signal, fully mobilizing the spatial freedom of the system. Further improve spectrum utilization.

   Beamforming technology means that users in one frequency band can transmit data together without interference, and the signals at the receiving end are accumulated to achieve the purpose of improving the received signal strength. This technology allows energy to be concentrated to the user with less diffusion for a reliable connection.

   Fourth core technology: new multi-carrier technology

   A carrier is an electromagnetic wave that carries a specific frequency of data. Multi-carrier is the selection of multiple carrier data signals, converting the data signals that need to be transmitted into parallel low-speed sub-data streams, and modulating them for transmission on each sub-channel. Multi-carrier technology is mainly used in conjunction with large-scale MIMO technology, featuring high spectral efficiency, high flexibility, and low complexity. Carrier aggregation technology aggregates multiple carriers into a wider spectrum and spreads together discontinuous spectrum segments together to achieve greater bandwidth, greatly increasing transmission rates, and reducing latency.