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首页> 外文期刊>Microwave and optical technology letters >QUADRUPLE-MODE BROADBAND BPF WITH SHARP SKIRT AND WIDE UPPER-STOPBAND PERFORMANCE
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QUADRUPLE-MODE BROADBAND BPF WITH SHARP SKIRT AND WIDE UPPER-STOPBAND PERFORMANCE

机译：具有短裙和宽上止带性能的四模式宽带BPF

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摘要

In this article, a broadband bandpass filter (BPF) with sharp skirt and wide upper-stopband performance is proposed using the quadruple-mode stub-loaded resonator. The resonator formed by attaching three stepped-impedance open stubs to high impedance microstrip line can generate two even-mode resonant frequencies f_(m1) and f_(m3) and two odd-mode ones f_(m2) and f_(m4) in the desired band. The f_(m2) can be approximately determined by the high impedance microstrip line. The open stub at the center plane can only control the even-modes and two identical open stubs are mainly applied to adjust the resonant frequencies f_(m3) and f_(m4). Two transmission zeros are created near the cutoff frequencies by the open stub at the center plane and two interdigital coupling feeding lines, leading to sharp shirt. Two additional transmission zeros are generated in the upper-stopband by two identical open stubs and two interdigital coupling feeding lines to suppress two main high harmonic resonant frequencies. A broadband filter prototype is simulated, fabricated, and measured. The measured results agree well with the electromagnetics (EM) simulations.
机译：在本文中，提出了一种使用四模式短截线负载谐振器的具有陡峭裙边和较宽的上阻带性能的宽带带通滤波器（BPF）。通过在高阻抗微带线上连接三个步进阻抗开路短截线而形成的谐振器可以在谐振器中产生两个偶模谐振频率f_（m1）和f_（m3）以及两个奇模谐振频率f_（m2）和f_（m4）。所需的乐队。 f_（m2）可以由高阻抗微带线大致确定。中心平面处的开路短截线只能控制偶数模式，两个相同的开路短截线主要用于调整谐振频率f_（m3）和f_（m4）。中心平面处的开路短截线和两条叉指耦合馈线在截止频率附近产生两个传输零，导致衬衫锋利。两个相同的开路短截线和两条叉指耦合馈线在上阻带中产生两个附加的传输零，以抑制两个主要的高谐波谐振频率。对宽带滤波器原型进行了仿真，制造和测量。测量结果与电磁（EM）模拟非常吻合。

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