China's high-temperature superconductor application has made a major breakthrough
The first batch of high-temperature superconducting filter systems independently developed and owned by China have been completed in production and delivered to users, and have been put into long-term practical applications in communications equipment in 16 provinces and cities across the country. This is a major breakthrough in the application research of high-temperature superconductors in China, indicating that China's high-temperature superconductor has entered the stage of commercial application and industrialization in the field of communications. The appraisal experts highly praised the project achievements. The appraisal opinion pointed out that the overall technology of the project has reached the international advanced level, which has laid a solid technical foundation for the adoption of high-temperature superconductivity technology to improve the anti-out-of-band interference performance and electromagnetic compatibility of communications equipment. The modernization of communications has made significant contributions.
According to the report of Science and Technology Daily, according to the project leader Cao Bisong, professor of the Physics Department of Tsinghua University, since the discovery of high-temperature superconducting materials in 1986, China has invested a large amount of manpower and material resources for applied research and technological research in the past 26 years. Its ultimate goal is to achieve high temperatures. Large-scale commercial application of superconducting materials. "The HTS filter system was purchased by the end user and put into operation in batches in 16 provinces and cities across the country. It is totally different from the general research or the application for the purpose of testing, marking that after long-term and unremitting research, our high temperature Superconductivity research has progressed from the laboratory research stage to large-scale commercial applications for end users. The real practical application of HTS has become a reality."
It is understood that at the microwave frequency band, the resistance of high-temperature superconducting materials is 2-3 orders of magnitude lower than that of ordinary metals. Filters made with superconducting thin-film materials have small internal band loss, steep edges, and good out-of-band rejection, and have conventional filters. Unmatched, near ideal filtering performance. "But high-temperature superconducting materials must achieve a superconducting zero-resistance characteristic below their transition temperature Tc, so the research and development of high-temperature superconducting filter systems is very difficult. The superconducting filter system we jointly developed with Variety Superconducting Technology Co., Ltd. is A superconducting filter, a low-noise amplifier operating at minus 200 degrees Celsius, and a small-sized refrigerator and the like, has extremely low noise and excellent frequency selectivity, and can be applied to various wireless communication devices while significantly increasing sensitivity And selectivity, improve anti-interference ability and detection distance, etc.†Cao Bisong said.
In 2005, under the support of the national scientific research funds, the project team established a superconducting filtering system mobile communication application demonstration base in Beijing and realized long-term application of small batches. In order to realize the large-scale commercial application of superconducting filtering system in China, the research team of Tsinghua University and Variety Superconducting Technology Co., Ltd. has been working hard for more than ten years to overcome the high performance. Superconducting filter and low-temperature low-noise amplifier design and preparation technology, multi-channel superconducting filter performance consistent development technology, meet the demanding requirements of the environment adaptability technology and superconducting filter system integration technology and a series of technical problems, get the super Guided filter technology has authorized more than 10 invention patents. In December 2009, it completed the development of a superconducting filtering system product prototype.
From January to November 2010, under the organization of the national competent department, seven professional test units conducted comprehensive performance tests on superconducting filtering system products, including electrical performance tests, to meet the high and low temperature, shock, vibration, and low Environmental adaptability tests such as pressure, salt spray, mildew, damp heat and other stringent requirements, performance comparison tests before and after the installation of superconducting filter systems in communications equipment, and long-term trials by users.
The test results show that the overall performance of the superconducting filter system meets or exceeds the technical requirements for practical application of communication equipment. The performance comparison test before and after the superconducting filter system was installed on the communication equipment showed that the superconducting filter system restored the normal communication equipment that could not work under heavy interference, and the average effect of the equipment under medium interference was increased more than the original equipment. 56%. Since October 2010, the superconducting filter system has been put into long-term operation on this type of communication equipment and has been continuously operated without failure for more than two years.
On January 19, 2011, the superconducting filtering system passed the technical appraisal organized by the national competent authority and obtained the permit for the practical application of communication equipment in China. In August of the same year, Variety Superconductor Co., Ltd. obtained the order contract for the first five types of superconducting filtering system products, which was promoted and applied in more than 10 provinces and cities across the country. Other types of superconducting filter system products will also be put into the market in the coming years.
According to reports, Variety Superconducting Technology Co., Ltd. is invested by shareholders such as Jiangsu Variety Arts Co., Ltd. and established a high-tech enterprise in 2006. The company is located in the Zhongguancun Science Park in Beijing. At present, Variety Superconductor has established a first-class production base for superconducting filter systems, and has successfully completed mass production and user delivery of the first high-temperature superconducting filter systems.
Cao Bisong said that the high-temperature superconducting filter technology has broad application prospects in mobile communications, major scientific projects, and defense. In order to further promote the application of superconducting filtering technology, it is also necessary to overcome the research difficulties in the design of difficult superconducting filter systems adapted to the requirements of various communication equipment applications, preparation techniques, and environmental adaptability technologies adapted to various application environments.
Experts at the meeting believed that after several years of efforts, the technology will be applied in more wireless communications fields, and will lead the formation and development of related industrial chains such as superconducting thin films, refrigerators, and special microwave components. A brand-new high-temperature superconducting high-tech industry provides a brand-new, high-performance solution for the upgrading of China's communications technology.
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