The Global Times learned from the Second Academy of Aerospace Science and Industry on April 19 that 25 institutes of the second Academy of Aerospace Science and Industry in Beijing have completed the country's first real-time wireless transmission of terahertz orbital angular momentum, using a high-precision helical phase plate antenna to achieve four different beam modes in the 110GHz band. This paper completes 100Gbps wireless real-time transmission on the 10GHz transmission bandwidth through 4 mode synthesis, improves the bandwidth utilization rate to a maximum extent, and provides important guarantees and supports for the development of 6G communication technology in our country.
Wireless backpass is the key technology of connecting base station and core network equipment in mobile backpass network. With the increasing demand of communication rate, the mobile communication frequency band is extended to millimeter wave and higher terahertz frequency band, the signal transmission loss increases greatly, and the deployment density of base station will increase exponentially. In the 5G/6G communication era with "highly dense" base stations, traditional fiber-based bearer network transmission will face high cost, long deployment cycle, poor flexibility and other problems, and wireless backtransmission technology will gradually occupy a dominant position. According to the research report, by 2023, more than 62% of base stations worldwide will use wireless relay.
As a new spectrum technology, terahertz communication has gradually become one of the key technologies of 6G communication, which can provide a larger transmission bandwidth and meet the needs of higher transmission rates, according to the Global Times. In the future, the peak rate of 6G communication will reach 1Tbps, so it is necessary to further improve the utilization rate under the existing spectrum resources to achieve higher wireless transmission capability.
Since 2021, aiming at the hot demand of 6G communication and keeping up with the forefront of international communication technology, the 25 Institute has chosen terahertz orbital angular momentum communication as a new breakthrough direction to realize multiplex signal multiplexing transmission in the terahertz frequency band, complete ultra-large capacity data transmission, and increase the frequency spectrum utilization rate by more than two times. In the future, the technology can also serve the short-range broadband transmission field of 10m to 1km, provide support for the high-speed transmission between lander and cruiser for lunar exploration and fire exploration, the cable-free bus transmission inside spacecraft and other aerospace applications, and provide information support for China's deep space exploration and the research and development of new spacecraft.
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