A Design Method of Multimode Multiband Bandpass Filters

A Design Method of Multimode Multiband Bandpass Filters
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一种多模多带带通滤波器的设计方法

DOI:
10.1109/tmtt.2018.2815682
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发表时间:
2018-03
影响因子:
4.3
通讯作者:
Jiang Linan
Jiang Linan
中科院分区:
工程技术1区
文献类型:
--
作者:
Ma Pengyu;Wei Bin;Hong Jiasheng;Xu Zhan;Guo Xubo;Cao Bisong;Jiang Linan

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本文提出了一种多带滤光片的通用设计方法。首先,推导了从低通原型滤波器到实用多带带通滤波器的频率和元件变换。然后,还得到了耦合多模谐振器与外部品质因数<串联公式<tex-数学记号=“LaTeX”>$k$</tex-数学>/串联-公式>之间的耦合系数的计算公式。此后,耦合多谐振子多带滤光片的设计过程与单带滤光片的设计过程类似。用该方法成功地设计并制作了三模谐振器三频微带滤波器,验证了理论的正确性。
In this paper, a general design method for multiband filters is proposed. First, the frequency and element transformations from a low-pass prototype filter to a practical multiband bandpass filter is derived. Afterwards, formulas for extracting the coupling coefficient <inline-formula> <tex-math notation="LaTeX">$k$ </tex-math></inline-formula> between coupled multimode resonators and the external quality factor <inline-formula> <tex-math notation="LaTeX">$Q_{e}$ </tex-math></inline-formula> are also obtained. Thereafter, the design procedure of coupled multiresonator multiband filters is similar to that of single-band filters. A tri-band microstrip filter with tri-mode resonators is successfully designed with the proposed method and fabricated, which validates this theory.
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