Millimeter-wave sensitivity of YBCO grain boundary Josephson junctions coupled with coplanar waveguide-fed slot dipole antennas
Millimeter-wave sensitivity of YBCO grain boundary Josephson junctions coupled with coplanar waveguide-fed slot dipole antennas
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DOI：
10.1109/tasc.2005.849915
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发表时间：
2005-06
影响因子：
1.8
通讯作者：
K. Nakajima;N. Ebisawa;H. Sato;Jian Chen;T. Yamashita;Y. Sawaya
中科院分区：
文献类型：
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作者：
K. Nakajima;N. Ebisawa;H. Sato;Jian Chen;T. Yamashita;Y. Sawaya
研究了在高温/亚C/约瑟夫森结探测器中引入毫米波准光对提高耦合效率的作用。为了提高效率，既需要增加结电阻，又需要实现低阻抗天线。结合约瑟夫森结探测器，设计了一种低阻抗的共面波导馈电缝隙偶极子天线。给出了天线阻抗降低对耦合效率的改善，并与缝隙偶极子天线的数值计算结果进行了比较。
Improvements in the coupling efficiency of millimeter wave quasioptically introduced to high-T/sub C/ Josephson junction detectors have been studied. Both increasing of junction resistance and implementation of a lower impedance antenna are required to improve the efficiency. We designed a coplanar waveguide feed slot dipole antenna as a low impedance antenna combined with the Josephson junction detectors. Improvements in the coupling efficiency due to decreasing of antenna impedance have been demonstrated and compared with numerically obtained results by the finite difference time domain method on the slot dipole antenna.