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

IF 4.8 2区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Yikai Chen;Xiaochi Lu;Haotian Li;Shiwen Yang
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引用次数: 0

摘要

共享孔径天线阵列有望在有限空间内集成多个天线阵列孔径,从而保证足够的频率带宽和角覆盖。然而,这些阵列经常遭受严重的跨带耦合,导致辐射性能下降。这封信提出了一种集成了小型开路存根的新型平衡器。通过级联多个四分之一波长的开放存根,并有策略地弯曲它们以适应最大宽度,所提出的平衡引入传输零点,为来自其他频段的电磁干扰提供过滤能力。然后建立了等效电路模型,以方便平衡器与天线的集成。利用新型小型化滤波平衡器和等效电路模型,研制了一种适用于第五代基站的三波段天线阵列。制作了一个原型并进行了测量,以验证所提出方法的有效性。测量结果表明,低频段(0.69 GHz ~ 0.96 GHz)与中频段(1.90 GHz ~ 2.70 GHz)的隔离度在中频段从18.0 dB提高到32.0 dB,低频段与高频段(3.30 GHz ~ 3.90 GHz)的隔离度在高频段从25.0 dB提高到36.0 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.
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来源期刊
CiteScore
8.00
自引率
9.50%
发文量
529
审稿时长
1.0 months
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.
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