The miniature microstrip square-ring 2.4/5.2 GHz dual-band bandpass filter

A 2.4/5.2 GHz dual‐band bandpass filter is designed and printed on Al2O3 ceramic substrate. The filter is based on two square‐patch resonators and two T‐type input/output lines. The square‐ring structure is used to replace the square‐patch for minimization because of longer current path. Using the h...

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Bibliographic Details
Published in:Microwave and optical technology letters 2009-02, Vol.51 (2), p.515-518
Main Authors: Kung, Cheng-Yuan, Chen, Yin-Chung, Yang, Cheng-Fu, Chen, Hua-Ming
Format: Article
Language:English
Subjects:
Al2O3 substrate
dual-band
printing
WLAN
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Summary:A 2.4/5.2 GHz dual‐band bandpass filter is designed and printed on Al2O3 ceramic substrate. The filter is based on two square‐patch resonators and two T‐type input/output lines. The square‐ring structure is used to replace the square‐patch for minimization because of longer current path. Using the higher dielectric constant and loss tangent ceramic substrate, the proposed filters have the advantages of low insertion loss, high out‐of‐band rejection, mini size, and simple structure. As compared to the square‐patch filter, the proposed square‐ring filter has 51% size reduction. And the measured results of the fabricated filters have good agreement with the simulated values. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 515–518, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24085
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.24085