Miniature bandpass filter with wide stopband using open-loop resonators

To reduce the size and improve the performance, a miniature microstrip bandpass filter (BPF) is investigated in this article. On the basis of open‐loops, an interdigital capacitive load has been connected. The new design has advantages of a compact size and a large ratio of the first spurious resona...

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Bibliographic Details
Published in:Microwave and optical technology letters 2011-04, Vol.53 (4), p.748-751
Main Authors: Feng, Li-Ying, Zheng, Hong-Xing, Sun, Cheng-Guang, Gao, Feng-You
Format: Article
Language:English
Subjects:
bandpass filter
Bandpass filters
microstrip
Microwaves
Miniature
On-line systems
open-loop resonator
Reproduction
Resonant frequencies
Resonant frequency
Resonators
slow-wave effect
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Summary:To reduce the size and improve the performance, a miniature microstrip bandpass filter (BPF) is investigated in this article. On the basis of open‐loops, an interdigital capacitive load has been connected. The new design has advantages of a compact size and a large ratio of the first spurious resonant frequency to the fundamental frequency. A fabricated microstrip BPF has been validated design, and experiment results are shown in very good agreement with expectation. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:748–751, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25829
ISSN:0895-2477
1098-2760
1098-2760
DOI:10.1002/mop.25829