The design of a linear phase superconducting filter with quasi-elliptic response
The design of a linear phase superconducting filter with quasi-elliptic response
复制标题
DOI：
10.1088/0953-2048/21/6/065018
复制
发表时间：
2008-04
影响因子：
3.6
通讯作者：
T. Zuo;S. Yan;Xinjie Zhao;H. Yue;Q. Xie;L. Fang
中科院分区：
文献类型：
--
作者：
T. Zuo;S. Yan;Xinjie Zhao;H. Yue;Q. Xie;L. Fang
本文介绍了一种具有准椭圆响应的线性相位超导滤波器的设计。该滤光片的耦合结构包括两个三分体和一个四重体。两个三分体用于产生两个独立的传输零点，具有较高的选择性，由曲折的开环微带谐振器实现；四个三分体用于相位均衡，由四个新颖的L形微带谐振器实现。该滤波器设计频率为1950 MHz，带宽为20 MHz。它是在LaAlO_3晶片上双层镀制Tl2Ba2CaCu2O8薄膜制成的。仿真和测量结果表明，该滤波器具有良好的选择性和80%以上的通带平坦群延时。
This paper presents the design of a linear phase superconducting filter with quasi-elliptic response. The coupling structure of the filter contains two trisections and one quadruplet. The two trisections are applied to generate two independent transmission zeros for high selectivity and are realized by meandered open-loop microstrip resonators; the quadruplet is applied for phase equalization and realized by four novel L-shaped microstrip resonators. The filter is designed at 1950 MHz with a bandwidth of 20 MHz. It is fabricated on a LaAlO3 wafer with double-coated Tl2Ba2CaCu2O8 films. The filter shows good selectivity together with flat group delay over 80% of the passband both in the simulation and measurements.