Design of Compact HTS Dual-Band Bandpass Filters Using Dual-Function Feeding Structure With Wide Stop-Band Response
Design of Compact HTS Dual-Band Bandpass Filters Using Dual-Function Feeding Structure With Wide Stop-Band Response
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DOI：
10.1109/tasc.2016.2642793
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发表时间：
2017
影响因子：
1.8
通讯作者：
N. Sekiya
中科院分区：
文献类型：
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作者：
N. Sekiya
我们研制了一种紧凑型高温超导四极双通带滤波器（DBPF），它采用双功能馈电结构，具有宽阻带响应。使用短路的负载发夹谐振器使其实现。通过在谐振器之间使用一对H形耦合元件来灵活地控制耦合系数。新开发的双功能馈电结构可灵活调节两个频段的外部耦合。抽头线耦合用于调节第一频带的外部耦合，耦合线耦合用于调节第二频带的外部耦合。DBPF的设计工作频率为0.8 GHz，第一频段带宽为16 MHz（2%），第二频段带宽为2.0 GHz，40 MHz（2%）。采用YBa2Cu3Oy薄膜在CeO2缓冲的Al2O3衬底上制作了一个紧凑的（30mm × 28.25mm）滤波器。实测结果与模拟结果吻合较好。
We have developed a compact high-temperature superconducting four-pole dual-band bandpass filter (DBPF) using a dual-function feeding structure with a wide stop-band response. Use of shorted stub-loaded hairpin resonators enabled its achievement. The coupling coefficients are flexibly controlled by using a pair of H-shaped coupling elements between the resonators. A dual-function feeding structure is newly developed for flexibly adjusting the external coupling for the two bands. A tapped-line coupling is used to adjust the external coupling for the first band, and a coupled-line coupling is used to adjust the external coupling for the second one. The DBPF was designed to operate at 0.8 GHz with a 16-MHz (2%) bandwidth for the first band and at 2.0 GHz with a 40-MHz (2%) bandwidth for the second band. A compact (30 mm × 28.25 mm) filter was fabricated using YBa2Cu3 Oy thin film on a CeO2-buffered Al2O3 substrate. The measured results agree well with the simulated ones.