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基于回转器原理,提出了一种具有高线性度、高Q值和大电感值的新型高频有源电感。将一MOS管与回转器中的负跨导器并联,形成跨导退化结构,降低了输入信号的波动的影响,实现了高线性度。在回转器的正跨导器中,引入了反馈电阻支路,增加了回转通路,实现了大电感值。将负电容电路与有源电感的输入端相连,减小了其等效输入电容和等效电阻,实现了宽工作频带与高Q值。对有源电感进行验证表明,电感工作频带为1~12GHz,在6.55GHz的高频下,Q值达到峰值566,同时,电感值可在19.6~26.3nH范围内调谐,Q值的线性度Q-1dB为-18dBm,同时在8.15GHz下,L值的线性度L-1dB为-20dBm。 相似文献
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The “111” type Li x FeAs (x ranges from 0.8 to 1.2) with Cu2Sb type tetragonal structure was synthesized with T c 18 K. The isostructure NaFeAs was further studied, which shows superconductivity with T c up to 26 K. The effect of pressure on superconductivity was investigated. 相似文献
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Effects of pressure and/or magnetism on the critical superconducting temperature(Tc)ofδ-Mo N single crystal were investigated using a Maglab system.Theδ-Mo N single crystal was synthesized at extreme conditions of high pressure and high temperature.The carrier density ofδ-Mo N single crystal as a function of applied pressure was determined using Hall coefficient measurement. 相似文献
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Defect evolution in a single crystal silicon which is implanted with hydrogen atoms and then annealed is investigated in the present paper by means of molecular dynamics simulation. By introducing defect density based on statistical average, this work aims to quantitatively examine defect nucleation and growth at nanoscale during annealing in Smart-Cut~ technology. Research focus is put on the effects of the implantation energy, hydrogen implantation dose and annealing temperature on defect density in the statistical region. It is found that most defects nucleate and grow at the annealing stage, and that defect density increases with the increase of the annealing temperature and the decrease of the hydrogen implantation dose. In addition, the enhancement and the impediment effects of stress field on defect density in the annealing process are discussed. 相似文献
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Recently,θ-TaN was proposed to be a topological semimetal with a new type of triply degenerate nodal points.Here,we report studies of pressure dependence of transport,Raman spectroscopy and synchrotron x-ray diffraction on θ-TaN up to 61 GPa.We find that θ-TaN becomes superconductive above 24.6 GPa with T_c at 3.1 K.The θ-TaN is of n-type carrier nature with carrier density about 1.1 × 10~(20)/cm~3 at 1.2 GPa and 20 K, while the carrier density increases with the pressure and saturates at about 40 GPa in the measured range.However,there is no crystal structure transition with pressure up to 39 GPa,suggesting the topological nature of the pressure induced superconductivity. 相似文献
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In situ angle dispersive synchrotron X-ray diffraction and Raman scattering measurements under pressure are em- ployed to study the structural evolution of Cu4Bi4S9 nanoribbons, which are fabricated by using a facile solvothermal method. Both experiments show that a structural phase transition occurs near 14.5 GPa, and there is a pressure-induced re- versible amorphization at about 25.6 GPa. The electrical transport property of a single Cu4Bi4S9 nanoribbon under different pressures is also investigated. 相似文献
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