基于H型谐振器的L波段宽带高温超导滤波器设计

宽带的高节数高温超导滤波器一直是滤波器设计和制作的难点.主要原因是强耦合的设计要求使得谐振器间距过小,制作精度难以达到.本文使用H型强耦合谐振器设计和制作了中心频率1335 MHz、相对带宽28%的14节高陡峭度超导滤波器.H型谐振器具有耦合系数高和结构紧凑、对称的性质.高的耦合系数使得H型谐振器适合用于宽带滤波器的设计;紧凑、对称的结构使得高节数的高性能宽带滤波器的实现成为可能.高温超导滤波器在无调谐情况下测试结果为S21<0.33 dB,S11<-11.3 dB,带外抑制超过70dB,矩形系数达到1.3,测试结果与设计结果符合得很好.

DESIGN OF BROADBAND HTS FILTER IN L-BAND USING H-SHAPE RESONATORS

The broadband and high pole HTS filter design is difficulty due to the strong coupling and small gap between the resonators in processing. In this paper,we design and fabricated a 14-pole HTS filter by using H-shape resonator to carry out the center frequency at 1335 MHz,28% of the fragment bandwidth. The H-shape resonator has the character of high coupling coefficient,compact and symmetry structure. It providers the possibility for broadband HTS filter design. At the result,we measured our filter at S21 < ...