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Design and Implement of High Performance and Miniaturization of SIR Microstrip Multi-Band Filters Jhin-Fang HUANG Mao-Hsiu HSU Publication IEICE TRANSACTIONS on Electronics Vol.E88-C No.7 pp.1420-1429 Publication Date: 2005/07/01 Online ISSN: DOI: 10.1093/ietele/e88-c.7.1420 Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Special Section on Recent Technologies of Microwave and Millimeter-Wave Devices Focusing on Miniaturization and Advancement in Performance with Their Applications) Category: Resonators & Filters Keyword: multi-band, stepped-impedance resonator, microstrip, miniaturization, Full Text: PDF(737.4KB)>>
Summary: This paper presents a novel method of designing microstrip line multi-frequencies band filters by applying the SIR (stepped impedance resonators) technology. Utilizing the S-parameter and the ABCD parameters of a two-port network is for the analysis of short-circuited and open-circuited resonators with various combinations of series and shunt sequences. By controlling the impedance ratio of the resonators, both center frequencies of the two passbands then are determined. Moreover, a global synthesis approach is also discussed on miniaturization. A simplified architecture based on bent SIR offers the 50% area reduction of layout. Technology of matching circuit creates higher performance multi-band filter. We adjust impedance and electrical length of transmission line (TL) to compensate multi-band and bending for matches and highly improve the insertion and reflection loss. Simulation and measurement are performed to validate our method and are pretty matched. | |||||
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