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Compact quad-band bandpass filter based on sextuple-mode stepped impedance stub-loaded resonator

机译:基于六元模式步进阻抗短负载谐振器的紧凑型四频带带通滤波器

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摘要

A novel compact quad-band bandpass filter (BPF) with multi-transmission zeros is proposed. This filter utilises a sextuple-mode impedance resonator to achieve three passbands, and the fourth passband composes of single-end short-circuited resonators. Adopting an embedded and folded structure is employed to realise miniaturisation. Stub-stub coupling is introduced to produce transmission zeros, which can improve the passband selectivity. Finally, a quad-band BPF centring at 0.9/1.45/2.45/3.5 GHz is designed, fabricated and measured. The measured results have good agreement with the simulated ones.
机译:提出了一种新颖的具有多传输零点的紧凑型四频带带通滤波器(BPF)。该滤波器利用六模阻抗谐振器实现三个通带,而第四通带则由单端短路谐振器组成。采用嵌入式折叠结构来实现小型化。引入桩端-桩端耦合以产生传输零,这可以提高通带选择性。最后,设计,制造和测量了以0.9 / 1.45 / 2.45 / 3.5 GHz为中心的四频BPF。测量结果与模拟结果吻合良好。

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