A novel compact ring dual-mode filter with adjustable second-passband for dual-band applications |
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| Authors: | Tsung-Hui Huang Han-Jan Chen Chin-Sheng Chang Lih-Shan Chen Yeong-Her Wang Mau-Phon Houng |
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| Affiliation: | Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan; |
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| Abstract: | In this letter, a novel compact ring dual-mode with adjustable second-passband for dual-band applications are presented. A ring resonator with two different geometric dimensions are derived and designed to have identical fundamental and the first higher-order resonant frequencies, and to establish appropriate couplings in the structure. Moreover, the proposed filter has smaller size as compared with the basic topology of stopband filters and stepped-impedance-resonator (SIR) filters. The measured filter performance is in good agreement with the simulated response. |
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