Improvement in Power Handling Capability of Superconducting Filters Using Multi-Layered Microstrip Line Resonators
Improvement in Power Handling Capability of Superconducting Filters Using Multi-Layered Microstrip Line Resonators
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使用多层微带线谐振器提高超导滤波器的功率处理能力
DOI：
10.1109/tasc.2010.2089772
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Ohshima
中科院分区：
文献类型：
--
作者：
Y.Endo;S. Ono;M.Uno;T.Saito;K.Nakajima;S. Ohshima
研究了多层微带线谐振器超导滤波器的功率处理能力。多层MSLR由超导/绝缘/超导多层膜组成，以提高超导滤波器的功率处理能力。沿着多层MSLR的底部边缘流动的电流沿着比传统MSLR中的电流更不集中。基于切比雪夫函数设计了一个使用直型MSLR的3极点滤波器，其中心频率为5 GHz，带宽为100 MHz。利用模拟滤波器设计，在MgO衬底上分别制备了NbN单面600 nm厚膜和NbN/AlN/NbN单面300/20/300 nm多层膜的单层和多层MSLR滤波器。两种滤波器在6.8K下都显示出良好的频率响应。在6.8 K下测量了两种滤波器的输入输出关系。多层MSLR滤波器的功率处理能力比单层MSLR滤波器的功率处理能力大1.9 dB。因此，多层MSLR有助于提高超导滤波器的功率处理能力。
We investigated the power-handling capability of superconducting filters using multi-layered microstrip line resonators (MSLRs). A multi-layered MSLR consists of superconducting/insulating/superconducting multi-layered film to improve the power-handling capability of the superconducting filter. The current flowing along the bottom edges of the multi-layered MSLR was less concentrated than that in the conventional MSLR. A 3-pole filter using a straight-type MSLR was designed based on the Chebyshev function to have a center frequency of 5 GHz and a bandwidth of 100 MHz. The single-layered and multi-layered MSLR filters were fabricated with the simulated filter design using NbN single-sided 600-nm thick film and NbN/AlN/NbN single-sided 300/20/300-nm multi-layered film on MgO substrates. Both filters showed good frequency responses at 6.8 K. The input-output relations of both filters at 6.8 K were measured. The power-handling capability of the multi-layered MSLR filter was 1.9 dB larger than that of the single-layered MSLR filter. Thus, the multi-layered MSLR helped to improve the power-handling capability of superconducting filters.