A 12-Pole K-Band Wideband High-Temperature Superconducting Microstrip Filter
A 12-Pole K-Band Wideband High-Temperature Superconducting Microstrip Filter
复制标题
DOI：
10.1109/tasc.2011.2171957
复制
发表时间：
2012-03
影响因子：
1.8
通讯作者：
Jin Guo;Liang Sun;Shuyu Zhou;Y. Bian;Jia Wang;B. Cui;Chunguang Li;Xueqiang Zhang;Hong Li;Qiang Zhang;Xu Wang;C. Gu;Yusheng He
中科院分区：
文献类型：
--
作者：
Jin Guo;Liang Sun;Shuyu Zhou;Y. Bian;Jia Wang;B. Cui;Chunguang Li;Xueqiang Zhang;Hong Li;Qiang Zhang;Xu Wang;C. Gu;Yusheng He
本文报道了一种12极宽带高温超导微带带通滤波器。该滤波器的中心频率为23 GHz，带宽为4.2 GHz。该滤波器是在直径为2英寸、厚度为0.25 mm的MgO晶片上制作的，晶片上双面镀有YBCO薄膜。为了获得所需的带宽，本文采用了边缘耦合和端部耦合两种结构。输入输出耦合采用插入耦合结构，实现了极强的耦合。微波吸收材料被用来消除腔谐振。测试结果表明，该滤波器的中频插入损耗为1.3dB，回波损耗优于9.5dB，通带两侧的带外抑制大于55dB。
A 12-pole wideband high-temperature superconducting (HTS) microstrip bandpass filter is reported in this paper. The filter has a center frequency of 23 GHz and a bandwidth of 4.2 GHz. The filter was fabricated on a 2-in-diameter 0.25-mm-thick MgO wafer with double-sided YBCO films. Both edge and end coupling structures were employed in this paper to achieve the desired bandwidth. An insert coupling structure was used for input/output coupling to realize the remarkably strong coupling. A microwave-absorbing material was used to eliminate cavity resonances. The measured results show a midband insertion loss of 1.3 dB, a return loss better than 9.5 dB and an out-of-band rejection of over 55 dB on both sides of the passband.