{"title":"Design of Interdigital-Coupled Microstrip Line Bandpass Filters in the 28 and 38 GHz","authors":"Ming-An Chung, Chia-Wei Lin, Bing-Ruei Chuang","doi":"10.1155/mmce/9859221","DOIUrl":null,"url":null,"abstract":"<p>This paper presents a 28- and 38-GHz bandpass filter for 5G communication systems, which is implemented in an interdigital-coupling microstrip line structure on a Rogers RT5880 substrate. The main resonator is composed of two U-shaped units loaded with short cutoffs and stepped impedance stubs connected at the bottom of the U-shaped structure. The design is effectively tuned to work in the 28 and 38 GHz bands of 5G NR. The LC equivalent circuit of the filter is converted to a physical size of the lumped element by using planar microstrip technology for physical implementation; the suppression in the stop band is lower than −20 dB. The proposed bandpass filter is designed as a microstrip line structure, which can be easily matched with the next level components due to its planar structure. Therefore, it is easier to apply in 5G devices and is suitable for 5G n257 and n260 applications.</p>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/9859221","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of RF and Microwave Computer-Aided Engineering","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1155/mmce/9859221","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents a 28- and 38-GHz bandpass filter for 5G communication systems, which is implemented in an interdigital-coupling microstrip line structure on a Rogers RT5880 substrate. The main resonator is composed of two U-shaped units loaded with short cutoffs and stepped impedance stubs connected at the bottom of the U-shaped structure. The design is effectively tuned to work in the 28 and 38 GHz bands of 5G NR. The LC equivalent circuit of the filter is converted to a physical size of the lumped element by using planar microstrip technology for physical implementation; the suppression in the stop band is lower than −20 dB. The proposed bandpass filter is designed as a microstrip line structure, which can be easily matched with the next level components due to its planar structure. Therefore, it is easier to apply in 5G devices and is suitable for 5G n257 and n260 applications.
期刊介绍：
International Journal of RF and Microwave Computer-Aided Engineering provides a common forum for the dissemination of research and development results in the areas of computer-aided design and engineering of RF, microwave, and millimeter-wave components, circuits, subsystems, and antennas. The journal is intended to be a single source of valuable information for all engineers and technicians, RF/microwave/mm-wave CAD tool vendors, researchers in industry, government and academia, professors and students, and systems engineers involved in RF/microwave/mm-wave technology.
Multidisciplinary in scope, the journal publishes peer-reviewed articles and short papers on topics that include, but are not limited to. . .
-Computer-Aided Modeling
-Computer-Aided Analysis
-Computer-Aided Optimization
-Software and Manufacturing Techniques
-Computer-Aided Measurements
-Measurements Interfaced with CAD Systems
In addition, the scope of the journal includes features such as software reviews, RF/microwave/mm-wave CAD related news, including brief reviews of CAD papers published elsewhere and a "Letters to the Editor" section.
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