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| 1 | Space qualification mechanical tests of HTS filters for satellite application显示文摘High performance high-temperature superconducting (HTS) filters have been designed and constructed for satellite application. The filters are actually a superconducting integration of an 8-pole band-pass filter with an adjustable band-stop filter onto a single piece of LaAlO3 substrate (with dimension of 0.5×45×20 mm3). Typical results of the filters, i.e., Filters A (made by YBCO) & B (made by TBCCO) will be reported. The measured responses of Filter A showed excellent specifications, e.g., an insertion loss less than 0.1 dB, a return loss better than -22.5 dB in pass-band, band-edge steepness greater than 12 dB/MHz and out-of-band rejection at a certain band deeper than -110 dB. To satisfy the requirement of rocket launch and space operation, three filters of the above design have undergone mechanical environmental simulation tests for space qualification. Detailed analysis of the response curves of Filter B measured before and after the tests showed that no noticeable change in the per-formance can be found. All the filters passed the rigorous ground simulation tests, which is the first time in China for HTS devices and provided a solid foundation for satellite applications of high-temperature superconductors in the near future. | HUANG JianDong SUN Liang LI ShunZhou MENG QingDuan ZHANG Qiang LI Fei ZHANG XueQiang LI ChunGuang HE AiSheng LI Hong GU ChangZhi LUO Qiang SUN QinFen WANG XiaoLin SUN YiFan WANG ZhiBing WANG YunFei LUO Sheng HE YuSheng | 2007 | Chinese Science Bulletin2007，52，13： | 3 |
| 2 | HTS filter and front-end subsystem for GSM1800 wireless base station显示文摘 | Yusheng He Hong Li Aisheng He Shunzhou Li Chunguang Li Xueqiang Zhang Taiping Zhang Lingwen Yan Wenxiu Zhu Yuan Zhou Jingtao Liang Jiasheng Hong Lancaster M. J | 2002 | Science in China Series E: Technological Science2002，，6： | 1 |
| 3 | Neutron Scattering Study of Sr Substitution for Ba in YBa_(2)Cu_(3)O_(7-y)显示文摘Neutron diffraction aund inelastic scatterilug were curried out on YBa_(2)Cu_(3)O_(7-y)(r=0.5,1.0、1.25).It was coufirmed that the substitutiou of Sr for Ba in YBa_(2)Cu_(3)O_(7-y) inrcases the oxyge1n vacancies int the CuO chain.Moreuver.the sntbstittiou strengtlenx the coupling betw1ell the Ba O plane aldl the Cu O rhain,Moreoer. the crystiul stnlbility.Tlusse the ppossill.rnuscs of Te depression for Sr xilrtittril YBa_(2)Cu_(3)O_(7-y). | DING Yongfan LI Jizhou YANG Jiliaon ZHANG Baisheng KANG Jian YE Chuntang FU Qiang JIN Sheng CUI Yujian HE Aisheng HE Yiusheng | 1993 | Chinese Physics Letters1993，10，8： | 0 |
| 4 | High temperature super-conducting(HTS) C-band oscillator with phase noise of -134 dBc/Hz显示文摘A high Q HTS cavity resonator with resonating frequency f0=5.624 GHz was fabricated using high quality HTS film and high purity sapphire. The unloaded quality factor of the HTS resonator was as high as QU=1.09×106 at the nitrogen temperature, 77 K. A HTS local oscillator combining the high Q cavity resonator with a C-band low noise GaAs HEMT amplifier was then designed and constructed. The phase noise of the oscillator, measured by a HP 3048A noise measurement system, is -134 dBc/Hz at 10 kHz offset when the temperature is 77 K. This result is close to the best level reported by other groups in the world. | LI Hong HE Aisheng SHI Tiefeng GONG Zhonglin LI Shunzhou SUN Yongwei HE Yusheng | 2002 | Chinese Science Bulletin2002，47，5： | 0 |
| 5 | Ultrasonic investigations on elastic properties of (Bi,Pb)-Sr-Ca-Cu oxide ceramic superconductors显示文摘Ultrasonic velocities have been measured in single phaseBi1.7Pb0.3Sr2 CaCu2O8+x and Bi1.7Pb0.3Sr2Ca2O10+x polycrystalline samples.Anomalous changes of both longitudinal and transverse velocities wereobserved near 200K,which indicates that some structural phase transitiomight occur.The elastic constants of these samples have been determinedfrom the measured ultrasonic velocity data,which are much smaller thanthose of YBa2Cu3O7-yand BaTiO3,manifesting that the interlayer coup-ling will dramatically decrease when the c-axes of the unit cells of theseperovstite-like multilayer ceramics increase.The values of Poisson ratio,however,of those ceramics are very close,implying similar interatomicbonding forces.Corrected to void-free state,the Debye temperature ofthese materials is estirnated as 270±20k.The temperature dependence ofDebye temperatures for these materials is also calculated by using thesame method and reported for the first time. | HE Yusheng XIANG Jiong WANG Xin(Department of Physics, Tsinghua University)ZHANG Jincang CHANG Fanggao(Department of Physics, Henan Normal University)HE Aisheng(Physics Division, North University of Technology) | 1990 | Chinese Journal of Acoustics1990，9，3： | 0 |
| 6 | Structure Refinement of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) from Neutron Data显示文摘Neutron diffraction study on the structure of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) was carried out.Data refinements show that the average subcell structure for Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) is in the best fit of the space group Fmmm and the structure is described by alternate stacking of SrO-CuO_(2)-Ca-CuO_(2)-SrO slab and a double BiO layers.An oxygen layer sandwiched by the bismuth layers was conRrmed. | YE Chuntang YANG Jilian ZHANG Baisheng LI Jizhou KANG Jian JIN Lan DING Yongfan HE Yusheng ZHANG Jincang HE Aisheng XIANG Jiong | 1991 | Chinese Physics Letters1991，8，10： | 0 |
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