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Dual-band bandpass filters with multiple transmission zeros using λ/4 stepped-impedance resonators

机译:使用λ/ 4步进阻抗谐振器的多个传输零点的双带通滤波器

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摘要

Two novel dual-band microstrip bandpass filters (BPFs) with multiple transmission zeros are proposed in this article. The dual-band BPFs with second-order bandpass responses are due to two /4 stepped-impedance resonators (SIRs). Two passbands (center frequency ratio f(s)/f(0) is 2.36) are realized based on the asymmetric SIRs. The transmission zeros near the passbands can be adjusted conveniently using the stopband transmission characteristic of the open/shorted coupled lines. Two planar microstrip dual-band BPFs (epsilon(r) = 2.65, h = 0.5 mm) with four and six transmission zeros are designed and fabricated. High selectivity and good in-band performances can be achieved in the proposed filters.
机译:本文提出了两个具有多个传输零的新型双频带微带带通滤波器(BPF)。具有二阶带通响应的双频带BPF是由于两个/ 4步进阻抗谐振器(SIR)引起的。基于非对称SIR实现了两个通带(中心频率比f(s)/ f(0)为2.36)。通带开/短路耦合线的阻带传输特性可以方便地调整通带附近的传输零点。设计并制造了两个平面微带双频带BPF(epsilon(r)= 2.65,h = 0.5 mm),具有四个和六个透射零。所提出的滤波器可以实现高选择性和良好的带内性能。

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