https://scholars.lib.ntu.edu.tw/handle/123456789/147619
Title: | Design of Dual- and Triple-Passband Filters Using Alternately Cascaded Multiband Resonators Alternately Cascaded Multiband Resonators | Authors: | Chen, Chi-Feng Huang, Ting-Yi RUEY-BEEI WU |
Keywords: | Coupling coefficient; External quality factor; Microstrip filter; Stepped-impedance resonator; Transmission zero | Issue Date: | 2006 | Journal Volume: | 54 | Journal Issue: | 9 | Start page/Pages: | 3550-3558 | Source: | IEEE Transactions on Microwave Theory and Techniques | Abstract: | A novel method for designing multiband bandpass filters has been proposed in this paper. Coupling structures with both Chebyshev and quasi-elliptic frequency responses are presented to achieve dual- and triple-band characteristics without a significant increase in circuit size. The design concept is to add some extra coupled resonator sections in a single-circuit filter to increase the degrees of freedom in extracting coupling coefficients of a multi-band filter and, therefore, the filter is capable of realizing the specifications of coupling coefficients at all passbands. To verify the presented concept, four experimental examples of filters with a dual-band Chebyshev, triple-band Chebyshev, dual-band quasi-elliptic, and triple-band quasi-elliptic response have been designed and fabricated with microstrip technology. The measured results are in good agreement with the full-wave simulation results. © 2006 IEEE. |
URI: | http://scholars.lib.ntu.edu.tw/handle/123456789/325314 http://ntur.lib.ntu.edu.tw/bitstream/246246/200611150121366/1/368.pdf https://www.scopus.com/inward/record.uri?eid=2-s2.0-33748372760&doi=10.1109%2fTMTT.2006.880653&partnerID=40&md5=1c227f98502b04a3aec6e730f1246fe9 |
ISSN: | 00189480 | DOI: | 10.1109/TMTT.2006.880653 | SDG/Keyword: | Coupling coefficients; External quality factors; Microstrip filters; Stepped-impedance resonator; Transmission zero; Computer simulation; Coupled circuits; Microstrip devices; Natural frequencies; Optical resonators; Waveguide couplers; Bandpass filters |
Appears in Collections: | 電機工程學系 |
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