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- 2018
新颖高温超导紧凑型双CT结构带通滤波器
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Abstract:
设计了一种新颖的平面单螺旋菱形谐振器，采用平面单螺旋菱形谐振器设计滤波器时易于构成无交叉耦合线的紧凑型CT单元。利用CT单元在通带边缘产生传输零点，提高滤波器的边带抑制性能，实现滤波器整体结构的小型化设计，整个电路在视觉上具有立体感的美观效果。结合自拟的带通滤波器耦合矩阵，在面积为13.5 mm×3.8 mm、厚度为0.5 mm、介电常数为24.1的YBCO/LaAlO3/YBCO双面高温超导薄膜上，设计了通带为2 850～3 000 MHz的六阶新颖高温超导紧凑型双CT结构带通滤波器，该结构的带通滤波器可以实现两个传输零点、边带抑制度大于45 dB/MHz；同时二倍频通带在6 GHz处，实现了宽阻带。实物测试结果与理论设计能很好地吻合。
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