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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >A compact quad-band bandpass filter with mixed electric and magnetic coupling
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A compact quad-band bandpass filter with mixed electric and magnetic coupling

机译：具有混合电和磁耦合的紧凑型四频带带通滤波器

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摘要

In this paper, based on a novel multimode stub-loaded resonator, a second-order quad-band bandpass filter (BPF) with mixed electric and magnetic coupling is presented. The electric coupling and magnetic coupling are realized by arranging the parallel coupled lines and the grounded stub, respectively. Eight controllable resonant modes can be simultaneously excited and easily tuned. Eight transmission zeros are created, enhancing the passband selectivity. In addition, the bandwidths can be controlled independently by adjusting the coupling strength. A quad-band BPF centering at 0.67, 1.51, 2.84, 3.58 GHz with respective 3 dB fractional bandwidths of 13.4, 15.6, 9.2, 11.5% is designed, fabricated, and measured. The filter is compact with overall size 0.058 lambda(g) x 0.13 lambda(g). The measured results show a good consistence with the simulated ones.
机译：本文基于新颖的多模空型谐振器，提出了具有混合电耦合和磁耦合的二阶Quad频带带通滤波器（BPF）。通过分别布置平行耦合线和接地短截线来实现电耦合和磁耦合。可以同时激发八种可控的谐振模式和易于调整。创建八个传输零，增强通带选择性。另外，可以通过调节耦合强度独立地控制带宽。以0.67,1.51,2.84,3.58GHz为中心的四带BPF，设计，制造，测量和测量了3 dB分数带宽为3 dB分数带宽为13.4,15.6,9.2,11.5％。过滤器紧凑，整体尺寸为0.058λ（g）x 0.13λ（g）。测量结果显示了与模拟的结果良好的一致性。

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