Quarter-Wavelength Stepped-Impedance YBCO Resonators for Miniaturized Dual-Band High-Tc Superconducting Filters
Quarter-Wavelength Stepped-Impedance YBCO Resonators for Miniaturized Dual-Band High-Tc Superconducting Filters
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DOI：
10.1109/tasc.2009.2018089
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发表时间：
2009-06
影响因子：
1.8
通讯作者：
Li-Min Wang;M. Chang;Shiun-Fa Li;J. Liou;Chiuan-Yu Shiau;C.-I.G. Hsu;Ching‐Her Lee
中科院分区：
文献类型：
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作者：
Li-Min Wang;M. Chang;Shiun-Fa Li;J. Liou;Chiuan-Yu Shiau;C.-I.G. Hsu;Ching‐Her Lee
提出了一种适用于无线局域网的双频高温超导带通滤波器。采用四分之一波长阶跃阻抗谐振器，实现了滤波器的小型化和双频响应。仿真结果表明，在2.4 GHz和5.2 GHz两个通道具有双频特性，每个通道的最小带内插入损耗约为0.02 dB。该过滤器由双面沉积的YBa2Cu3Oy （YBCO）薄膜制成，并带有镀金外壳。所实现的HTS BPF在2.41 GHz和5.24 GHz有两个通带，最小插入损耗分别为0.86和1.97 dB。实测结果表明，该系统具有良好的HTS BPF性能。此外，基于修正双流体模型的公式可以很好地描述温度相关的中心频率，表明HTS BPF的频移主要由磁穿透深度的温度相关决定。
A dual-band high-temperature superconducting (HTS) bandpass filter (BPF) is proposed for wireless local area network applications. Using quarter-wavelength stepped-impedance resonators, the designed filter can be miniaturized and shows a dual-band response. The simulation results show the dual-band feature of two passbands at 2.4 and 5.2 GHz, each with a minimum in-band insertion loss of about 0.02 dB. The filter was made out of patterned double-sided deposited YBa2Cu3Oy (YBCO) films integrated with a gold-coated housing. The realized HTS BPF shows two passbands at 2.41 and 5.24 GHz with minimum insertion losses of 0.86 and 1.97 dB, respectively. The measured results show a good HTS BPF performance. Moreover, the temperature-dependent center frequencies can be well described by the modified two-fluid model based formulas, indicating that the frequency shift in HTS BPF is dominated by the temperature dependence of the magnetic penetration depth.