一种基于电容辅助三圈变压器的紧凑型宽带同步噪声与输入匹配方法

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

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-04-09 DOI:10.1109/TMTT.2025.3554820

Chenglong Liang;Ruixin Liang;Suyuan Gan;Bingjun Tang;Zixun Gao;Qian Dong;Zhaoyang Ma;Youze Xin;Yi Xie;Bing Zhang;Li Geng

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引用次数: 0

摘要

分析了一种基于传统高阶网络实现宽带同步噪声与输入匹配的方法，并利用电容辅助技术对其进行了改进。随后，提出了一种新的宽带SNIM方法，利用三线圈变压器结合电容辅助。在不改变传统拓扑结构的情况下，耦合因子的引入显著减小了芯片面积和无源元件的噪声贡献，从而降低了总体噪声系数（NF）。为了验证该设计，采用55纳米CMOS工艺设计了c波段两级电流复用低噪声放大器（LNA）。测量结果表明，在2.5 ~ 8.5 GHz的宽带范围内，S11低于−10 dB。5ghz时功率增益为24.6 dB， - 3db带宽为4.8 GHz。在4.2-8.5 GHz频段内，噪声匹配差（NF- nfmin）保持在0.15 dB， NF保持在2 dB以下，功耗仅为9.1 mW。

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A Compact Wideband Simultaneous Noise and Input Matching Method Based on Three-Coil Transformer With Capacitor Assistance for LNA Design

A method for achieving wideband simultaneous noise and input matching (SNIM) based on traditional higher order networks has been analyzed and improved through capacitor-assisted techniques. Subsequently, a new wideband SNIM approach, utilizing a three-coil transformer combined with capacitor assistance, is proposed. Without altering the conventional topological structure, the introduction of the coupling factor significantly reduced the chip area and the noise contribution from passive components, thereby lowering the overall noise figure (NF). To validate the design, a C-band two-stage current-reused low-noise amplifier (LNA) was designed with a 55-nm CMOS process. The measurement results indicate that S11 is below −10 dB across a wideband of 2.5–8.5 GHz. A power gain of 24.6 dB is achieved at 5 GHz with −3-dB bandwidth of 4.8 GHz. The noise matching discrepancy (NF-NF_min) remains 0.15 dB within the band range of 4.2–8.5 GHz, and NF maintains below 2 dB, while the power consumption is only 9.1 mW.

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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.