一个40GHz的高图像拒绝LNA与一个可切换的变压器基础的口过器在65纳米CMOS
1Key Laboratory of Radio Frequency Circuits and Systems, Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China.
Micromachines
|June 27, 2025
概括
本研究引入了一种用于5G毫米波应用的新型低噪音放大器 (LNA),使用跨阶段隙过器实现高图像拒绝率 (IRR). 该设计提供了极好的性能,最小的模具面积,对于先进的无线系统至关重要.
科学领域:
- 电气工程 电气工程
- 微波工程 微波工程
- 集成电路设计 集成电路设计
背景情况:
- 5G毫米波通信系统需要高效的低噪音放大器 (LNA).
- 实现高图像拒绝比率 (IRR) 对接收器性能至关重要,特别是在复杂的信号环境中.
- 传统的图像拒绝技术往往会导致显著的模块面积开销和功耗.
研究的目的:
- 为5G毫米波频段提出一种新的低噪声放大器 (LNA) 设计.
- 为了实现高的图像拒绝比率 (IRR),没有额外的模块面积.
- 分析电路参数对增益,噪声数据和IRR的影响.
主要方法:
- 使用变压器和开关电容阵列实现跨阶段口过结构.
- 优化传输零点和极点,以实现有效的图像抑制和阻抗匹配.
- 在真实和复杂阻抗条件下对极分布的分析,并导出零的质量因子 (Q).
主要成果:
- 在40 GHz时获得了18dB的增益和4.4dB的噪声 (NF) 值.
- 在6 GHz的中间频率 (IF) 显示出高53.4dB的图像拒绝比 (IRR).
- 从36.3到40.7 GHz的3dB带宽,整个带的IRR>42dB,低功耗 (25.4mW),以及紧的核心面积 (0.13mm2).
结论:
- 拟议的跨阶段口过结构有效地抑制图像频率,而不会增加面积.
- 该LNA设计符合5G毫米波应用的关键性能指标,包括高增益,低噪声和优异的IRR.
- 导出Q因子和IRR之间的关系为未来的LNA优化提供了有价值的设计指南.
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