新型交叉指型低频宽阻带超导滤波器研究  

DESIGN OF BROAD STOPBAND HTS FILTER USING INTERDIGITAL RESONATORS

作　　者：应志军[1] 李明杰[1] 张晓平[1] 魏斌[1] 郭旭波[1] 卢新祥[1] 李启荣[1] 冯骋[1] 曹必松[1] 

机构地区：[1]清华大学物理系,北京10008

出　　处：《低温物理学报》2010年第6期453-457,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(60471001)资助的课题

摘　　要：本文提出了一种用于低频宽阻带滤波器设计的新型交叉指型谐振器(Interdigital Resonator,IDR),该谐振器具有结构紧凑、实现较强耦合、显著推高寄生通带等优异性能.文中设计和制作了中心频率为360MHz、相对带宽为4%的12节高温超导滤波器,实测结果表明,从通带到1.27GHz的阻带抑制超过80dB,第一寄生通带与基频通带频率比超过3.5.测试结果与设计结果符合得很好.A new Interdigital resonator（IDR） used for designing low frequency and broad stopband high temperature superconducting（HTS） filters is introduced.IDR has the excellent character of compact,strong adjucent coupling and good spurious suppression.The design and fabrication of a 12-pole HTS filter centered at 360 MHz with a 4% bandwidth using IDRs are presented in this paper.The measurements show that the out-of-band rejection from fundamental passband to 1.27GHz is better than 80dB.The ratio between first spurious passband and fundamental frequency is over 3.5.The measured results are in good agreement with the simulated one.

关 键 词：高温超导滤波器 交叉指型 宽阻带 低频 

分 类 号：TN713[电子电信—电路与系统]