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Compact Bandpass Filters Using Folded Quad-Mode Stub-Loaded Loop Resonators

机译:使用折叠的Quad-Mode Stub-Loop谐振器的紧凑型带通滤波器

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Folded quad-mode stub-loaded loop resonators (QMSLLRs) are proposed for realizing both bandpass and dual-band bandpass filters with compact dimensions. The QMSLLR is a folded square loop loaded with four short stubs, providing structure symmetry in both transversal and longitudinal directions. Determined by the lengths of the loaded stubs, the four resonant frequencies as analyzed with even-odd mode method can be either distributed in one passband with equal space, or in two passbands with a guard band in between, for realizing a single-band bandpass filter or a dual-band bandpass filter, respectively. For both the input and output couplings, two perpendicular feeding lines are parallel coupled to the QMSLLR at one corner. The measure results prove that the structure is suitable for the design of a medium band or even narrow band bandpass filters with compact dimensions.
机译:建议折叠的四峰模式存根环谐振器(QMSLLRS),用于实现具有紧凑尺寸的带通和双频带通滤波器。 QMSLLR是装载有四个短短截线的折叠方环,在横向和纵向方向上提供结构对称。由加载短截线的长度决定,与偶数模式方法分析的四个谐振频率可以在一个通带中分布,其中空间等于,或者在两个通带中,用于在两个通带中,用于实现单带带通量滤波器或双频带通滤波器分别。对于输入和输出耦合,两个垂直馈线并联耦合到一个角落的QMSLLR。措施结果证明该结构适用于具有紧凑尺寸的中间带甚至窄带带通滤波器的设计。

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