一种宽带、高隔离、共享孔径MIMO IBFD前端与CMS平衡和更少的多分接取消器

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-04-23 DOI:10.1109/TMTT.2025.3556403

Hongji Fan;Yiqiu Liang;Weiheng Chen;Wanjing Huang;Zhaoyi Wang;Zhiqiang Yu;Jianyi Zhou;Wei Hong

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引用次数: 0

摘要

本文介绍了一种宽带、高收发（TRX）隔离、共享孔径、多输入多输出（MIMO）带内全双工（IBFD）前端系统。在天线域，为了提高宽带范围内的端口隔离，设计了一种高共模抑制平衡器（CMSB）。实现了54.5 dB的无源自干扰消除（SIC）电平。在模拟域采用射频多抽头消去方案，提高了去耦效果。通过利用天线阵列内相邻单元之间的隔离特性，在双发双收（2T2R）前端系统中，多抽头消消器的数量从$2^{2}$减少到$2，显著降低了硬件成本和迭代时间。测量结果表明，在6.4 ~ 6.8 GHz的频率范围内，所提出的2T2R天线系统在任意TX和任意RX之间具有较高的隔离水平，超过64.5 dB。

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A Wideband, High Isolation, Shared-Aperture MIMO IBFD Front End With CMS Balun and Fewer Multitap Cancellers

This article presents a wideband, high transmitters and receivers (TRX) isolation, shared-aperture, multi-inputmulti-output (MIMO) in-band full-duplex (IBFD) front-end system. In the antenna domain, a high common-mode-suppression balun (CMSB) is developed to enhance port isolation within a wideband range. A passive self-interference cancellation (SIC) level of 54.5 dB is achieved. The RF multitap canceller scheme is implemented in the analog domain to improve the decoupling effects. By exploiting the isolation properties among adjacent elements within the antenna array, the number of multitap cancellers is reduced from

$2^{2}$

to 2 in the two transmitting and two receiving (2T2R) front-end systems, significantly decreasing the hardware cost and iteration time. The measurement results demonstrate that the proposed 2T2R antenna system exhibits high isolation levels, exceeding 64.5 dB, between any TX and any RX within the frequency range from 6.4 to 6.8 GHz.

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来源期刊

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.