{"title":"A wide stopband, high selectivity microstrip low-pass filter for wireless communications","authors":"","doi":"10.1016/j.aeue.2024.155443","DOIUrl":null,"url":null,"abstract":"<div><p>This article presents a compact microstrip low-pass filter (LPF) with a sharp roll-off rate (ROR) and an ultra-wide stopband for modern telecommunication applications. To achieve a relatively sharp transition band (−3 dB and −40 dB at the cut-off frequencies of 1.3 GHz and 1.57 GHz, respectively), a modified fifth-order circuit has been presented as the primary resonator. The frequency response of the primary filter is then enhanced by incorporating a few stubs in the primary resonator structure, which act as harmonic suppressors and help create a wide stopband. Simulation results show that the proposed LPF has a wide stopband width of approximately 28.43 GHz (from 1.57 to 30 GHz). The proposed LPF is fabricated on Rogers substrate with a total footprint of 35.3 mm × 15.9 mm. The measured values of ROR, suppression factor (SF), relative stopband band (RSB), and figure of merit (FOM) (137 dB/GHz, 2.2, 1.92, and 54,082, respectively) present the proposed LPF as a suitable choice for state-of-the-art communication circuits.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aeu-International Journal of Electronics and Communications","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1434841124003297","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This article presents a compact microstrip low-pass filter (LPF) with a sharp roll-off rate (ROR) and an ultra-wide stopband for modern telecommunication applications. To achieve a relatively sharp transition band (−3 dB and −40 dB at the cut-off frequencies of 1.3 GHz and 1.57 GHz, respectively), a modified fifth-order circuit has been presented as the primary resonator. The frequency response of the primary filter is then enhanced by incorporating a few stubs in the primary resonator structure, which act as harmonic suppressors and help create a wide stopband. Simulation results show that the proposed LPF has a wide stopband width of approximately 28.43 GHz (from 1.57 to 30 GHz). The proposed LPF is fabricated on Rogers substrate with a total footprint of 35.3 mm × 15.9 mm. The measured values of ROR, suppression factor (SF), relative stopband band (RSB), and figure of merit (FOM) (137 dB/GHz, 2.2, 1.92, and 54,082, respectively) present the proposed LPF as a suitable choice for state-of-the-art communication circuits.
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