A novel microstrip band-pass filter based on hole coupling structure

A novel C‐band hole‐coupled bandpass filter with metallized post (or via‐hole) arrays directly embedded in middle of the microstrip line is presented in this letter.The proposed filter removes via‐hole arrays embedded along waveguide section from the half‐mode substrate integrated waveguide filter,...

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Bibliographic Details
Published in:Microwave and optical technology letters 2011-12, Vol.53 (12), p.2811-2814
Main Authors: Yuan, Yan, Xu, Jun, Xu, Yan-Qing, Zhang, Xiao-Chuan
Format: Article
Language:English
Subjects:
Arrays
Bandpass filters
Circuits
hole-coupled band pass filter
Insertion loss
metallized post arrays
microstrip line
Microwaves
Noise levels
On-line systems
Waveguide filters
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Summary:A novel C‐band hole‐coupled bandpass filter with metallized post (or via‐hole) arrays directly embedded in middle of the microstrip line is presented in this letter.The proposed filter removes via‐hole arrays embedded along waveguide section from the half‐mode substrate integrated waveguide filter, while the new concept simplifies the structure of previous filter. Simulated and experimental results show that the proposed filter of this paper has good performances of low insertion loss, return loss, and better rejection characteristics. The insertion loss of measured four‐pole filter is about 0.8 dB, and the return loss is better than −25 dB in the whole passband. Keeping the advantages of excellent performances, the proposed filter can be constructed more conveniently and is suitable for low‐cost planar circuit. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2811–2814, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26373
ISSN:0895-2477
1098-2760
1098-2760
DOI:10.1002/mop.26373