Cross-coupled band-pass filter using HTS microstrip resonators
Cross-coupled band-pass filter using HTS microstrip resonators
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DOI：
10.1109/77.919388
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发表时间：
2001-03
影响因子：
1.8
通讯作者：
B. Min;Y. H. Choi;S. K. Kim;B. Oh
中科院分区：
文献类型：
--
作者：
B. Min;Y. H. Choi;S. K. Kim;B. Oh
我们利用高温超导材料制作了基于四重几何结构的微带带通滤波器。滤波器中的每个半波长谐振器由一个环形电感和两端的贴片电容组成。非相邻谐振器的环状电感器之间的电感耦合在频率响应中产生传输零点。传输零点可以通过改变交叉耦合的极性和强度来分配。我们已经设计了一个9极点滤波器的个人通信服务（PCS）的应用，使用的CAD工具和全波分析电磁仿真器的组合。我们在LaAlO/sub 3/衬底上制备了双面YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//（YBCO）薄膜滤波器。该滤波器的中心频率为1.784GHz，3dB带宽为11 MHz，插入损耗为0.8dB（60 K）.由于在通带附近存在传输零点，因此具有陡峭的边缘特性。距离通带边缘1 MHz处的衰减为-34 dB。
We have fabricated microstrip band-pass filters based on the quadruplet geometry using high-temperature superconductor. Every half-wavelength resonator in the filter consists of a loop-like inductor and two patch capacitors at both ends. The inductive coupling in between the loop-like inductors of non-adjacent resonators produces transmission zeros in the frequency response. The transmission zero can be allocated by changing the polarity and the strength of the cross coupling. We have designed a 9-pole filter for personal communication services (PCS) application using combination of a CAD tool and a full-wave analysis EM simulator. We have fabricated filters using double-sided YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) thin films on LaAlO/sub 3/ substrates. The filter has 1.784 GHz center frequency, 11 MHz 3-dB bandwidth, and 0.8 dB insertion loss at 60 K. Due to the transmission zeros near the passband, the steep skirt characteristic is exhibited. The attenuation at 1 MHz away from the edge of the passband is -34 dB.