{"title":"一种用于三波段共享孔径天线阵列跨带隔离增强的小型化低通滤波平衡器","authors":"Yikai Chen;Xiaochi Lu;Haotian Li;Shiwen Yang","doi":"10.1109/LAWP.2025.3587296","DOIUrl":null,"url":null,"abstract":"Shared-aperture antenna arrays are promising for the integration of multiple antenna array apertures in a limited space, ensuring sufficient frequency bandwidth and angular coverage. However, these arrays often suffer from serious cross-band coupling, leading to deterioration in radiation performance. This letter proposes a novel balun integrated with miniaturized open-circuited stubs. By cascading multiple quarter-wavelength open stubs and strategically bending them to fit the maximum width, the proposed balun introduces transmission zeros that provide filtering capability for electromagnetic interference from other frequency bands. An equivalent circuit model is then developed to facilitate the integration of the balun with the antennas. With the novel miniaturized filtering balun and the equivalent circuit model, a triple-band antenna array for the fifth-generation base stations is developed. A prototype is fabricated and measured to validate the effectiveness of the proposed approach. Measured results illustrate that the isolation between the low-band (0.69 GHz to 0.96 GHz) and middle-band (1.90 GHz to 2.70 GHz) is improved from 18.0 dB to 32.0 dB in the middle-band, and the isolation between the low-band and high-band (3.30 GHz to 3.90 GHz) is improved from 25.0 dB to 36.0 dB in the high-band.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 9","pages":"3248-3252"},"PeriodicalIF":4.8000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Miniaturized Low-Pass Filtering Balun for Cross-Band Isolation Enhancement in Triple-Band Shared-Aperture Antenna Arrays\",\"authors\":\"Yikai Chen;Xiaochi Lu;Haotian Li;Shiwen Yang\",\"doi\":\"10.1109/LAWP.2025.3587296\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Shared-aperture antenna arrays are promising for the integration of multiple antenna array apertures in a limited space, ensuring sufficient frequency bandwidth and angular coverage. However, these arrays often suffer from serious cross-band coupling, leading to deterioration in radiation performance. This letter proposes a novel balun integrated with miniaturized open-circuited stubs. By cascading multiple quarter-wavelength open stubs and strategically bending them to fit the maximum width, the proposed balun introduces transmission zeros that provide filtering capability for electromagnetic interference from other frequency bands. An equivalent circuit model is then developed to facilitate the integration of the balun with the antennas. With the novel miniaturized filtering balun and the equivalent circuit model, a triple-band antenna array for the fifth-generation base stations is developed. A prototype is fabricated and measured to validate the effectiveness of the proposed approach. Measured results illustrate that the isolation between the low-band (0.69 GHz to 0.96 GHz) and middle-band (1.90 GHz to 2.70 GHz) is improved from 18.0 dB to 32.0 dB in the middle-band, and the isolation between the low-band and high-band (3.30 GHz to 3.90 GHz) is improved from 25.0 dB to 36.0 dB in the high-band.\",\"PeriodicalId\":51059,\"journal\":{\"name\":\"IEEE Antennas and Wireless Propagation Letters\",\"volume\":\"24 9\",\"pages\":\"3248-3252\"},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Antennas and Wireless Propagation Letters\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/11074399/\",\"RegionNum\":2,\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Antennas and Wireless Propagation Letters","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/11074399/","RegionNum":2,"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}
A Miniaturized Low-Pass Filtering Balun for Cross-Band Isolation Enhancement in Triple-Band Shared-Aperture Antenna Arrays
Shared-aperture antenna arrays are promising for the integration of multiple antenna array apertures in a limited space, ensuring sufficient frequency bandwidth and angular coverage. However, these arrays often suffer from serious cross-band coupling, leading to deterioration in radiation performance. This letter proposes a novel balun integrated with miniaturized open-circuited stubs. By cascading multiple quarter-wavelength open stubs and strategically bending them to fit the maximum width, the proposed balun introduces transmission zeros that provide filtering capability for electromagnetic interference from other frequency bands. An equivalent circuit model is then developed to facilitate the integration of the balun with the antennas. With the novel miniaturized filtering balun and the equivalent circuit model, a triple-band antenna array for the fifth-generation base stations is developed. A prototype is fabricated and measured to validate the effectiveness of the proposed approach. Measured results illustrate that the isolation between the low-band (0.69 GHz to 0.96 GHz) and middle-band (1.90 GHz to 2.70 GHz) is improved from 18.0 dB to 32.0 dB in the middle-band, and the isolation between the low-band and high-band (3.30 GHz to 3.90 GHz) is improved from 25.0 dB to 36.0 dB in the high-band.
期刊介绍:
IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.