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LTCC Bandpass Filter With Wide Stopband Based on Electric and Magnetic Coupling Cancellation

机译:基于电磁耦合消除的宽阻带LTCC带通滤波器

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摘要

This paper presents a new method of using electric and magnetic coupling cancellation to extend the stopband of bandpass filters (BPFs). The mechanism is theoretically analyzed based on the lumped-element equivalent circuit. Due to the cancellation of electric and magnetic coupling between two resonators, three transmission zeros (TZs) can be generated and controlled by manipulating the coupling strength. Using the proposed method together with source–load coupling, a low temperature cofire ceramic (LTCC) BPF is designed with four TZs at the passband edges and within the stopband, resulting in high skirt selectivity and harmonic suppression. Due to the LTCC multilayer structure, the filter size is 0.054 (lambda _{g}* 0.045 lambda _{g}*0.013lambda _{g}) , or (2.48~{rm mm}times 2.02~ {rm mm}times 0.6) mm. The theoretical, simulated and measured results of the LTCC BPF are presented to validate the proposed design.
机译:本文提出了一种使用电和磁耦合抵消来扩展带通滤波器(BPF)的阻带的新方法。理论上基于集总等效电路对该机制进行了分析。由于取消了两个谐振器之间的电和磁耦合,因此可以通过控制耦合强度来生成和控制三个传输零点(TZ)。使用提出的方法和源-负载耦合,设计了一个低温共烧陶瓷(LTCC)BPF,在通带边缘和阻带内具有四个TZ,从而实现了高裙边选择性和谐波抑制。由于采用LTCC多层结构,过滤器尺寸为0.054 (lambda _ {g} * 0.045 lambda _ {g} * 0.013lambda _ {g}) (2.48〜{rm mm}乘以2.02〜{rm mm}乘以0.6) 毫米。给出了LTCC BPF的理论,仿真和测量结果,以验证所提出的设计。

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