论文提出了一种用于食品工业中常用添加剂(肌醇、亮氨酸、牛磺酸)高灵敏度区分的太赫兹超材料传感器。该传感器由带有双尖端的开口谐振环(Split Ring Resonator,SRR)阵列组成。液体样品的不同浓度和种类对应于传感器不同的频率偏移,可...论文提出了一种用于食品工业中常用添加剂(肌醇、亮氨酸、牛磺酸)高灵敏度区分的太赫兹超材料传感器。该传感器由带有双尖端的开口谐振环(Split Ring Resonator,SRR)阵列组成。液体样品的不同浓度和种类对应于传感器不同的频率偏移,可以被用于液体样品浓度和种类的区分和辨别。该超材料传感器使用微纳工艺制作在对太赫兹波透明的石英基板上。利用太赫兹时域光谱仪(THz-TDS)系统分别测量了浓度为0.2、0.4、1.5、2、3和4 mg/ml的液体样品。结果表明,所提出的超材料传感器能检测的最低样品浓度为0.2 mg/ml。同时,该传感器也可以实现相同浓度,不同种类液体样品的辨别。该研究为基于开口谐振环结构的太赫兹超材料传感器在食品安全领域的应用提供了新的参考。展开更多
A novel slotted helix slow-wave structure （SWS） is proposed to develop a high power, wide-bandwidth, and high reliability millimeter-wave traveling-wave tube （TWT）. This novel structure, which has higher heat capa...A novel slotted helix slow-wave structure （SWS） is proposed to develop a high power, wide-bandwidth, and high reliability millimeter-wave traveling-wave tube （TWT）. This novel structure, which has higher heat capacity than a conven- tional helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix tape. In this paper, the electromagnetic characteristics and the beam-wave interaction of this novel structure operating in the Ka-band are investigated. From our calculations, when the designed beam voltage and beam current are set to be 18.45 kV and 0.2 A, respectively, this novel circuit can produce over 700-W average output power in a frequency range from 27.5 GHz to 32.5 GHz, and the corresponding conversion efficiency values vary from 19% to 21.3%, and the maximum output power is 787 W at 30 GHz.展开更多
基金Supported by the National Natural Science Foundation of China(61921002,61988102)。
文摘论文提出了一种用于食品工业中常用添加剂(肌醇、亮氨酸、牛磺酸)高灵敏度区分的太赫兹超材料传感器。该传感器由带有双尖端的开口谐振环(Split Ring Resonator,SRR)阵列组成。液体样品的不同浓度和种类对应于传感器不同的频率偏移,可以被用于液体样品浓度和种类的区分和辨别。该超材料传感器使用微纳工艺制作在对太赫兹波透明的石英基板上。利用太赫兹时域光谱仪(THz-TDS)系统分别测量了浓度为0.2、0.4、1.5、2、3和4 mg/ml的液体样品。结果表明,所提出的超材料传感器能检测的最低样品浓度为0.2 mg/ml。同时,该传感器也可以实现相同浓度,不同种类液体样品的辨别。该研究为基于开口谐振环结构的太赫兹超材料传感器在食品安全领域的应用提供了新的参考。
基金Supported by National Natural Science Foundation of China(61531010,61921002)the International Cooperating Project of Sichuan Province(2018HH0132)the National Key Lab Foundation of China(9140A23010415DZ02001)。
基金Project supported by the National Natural Science Foundation of China(Grant No.61271029)the Natural Science Key Laboratory Foundationthe Natural Science Fund for Distinguished Young Scholars of China(Grant No.61125103)
文摘A novel slotted helix slow-wave structure （SWS） is proposed to develop a high power, wide-bandwidth, and high reliability millimeter-wave traveling-wave tube （TWT）. This novel structure, which has higher heat capacity than a conven- tional helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix tape. In this paper, the electromagnetic characteristics and the beam-wave interaction of this novel structure operating in the Ka-band are investigated. From our calculations, when the designed beam voltage and beam current are set to be 18.45 kV and 0.2 A, respectively, this novel circuit can produce over 700-W average output power in a frequency range from 27.5 GHz to 32.5 GHz, and the corresponding conversion efficiency values vary from 19% to 21.3%, and the maximum output power is 787 W at 30 GHz.
