一个40-50 GHz射频前端与集成的局部振荡器泄漏校准
Peigen Zhou1, Pinpin Yan1, Jixin Chen1
1State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
Micromachines
|November 25, 2023
概括
这项研究引入了40-50 GHz发射器前端,集成校准,以实现优异的图像拒绝和减少局部振荡器泄漏. 该设计符合IEEE 802.11aj标准,可实现高性能无线通信.
科学领域:
- 电气工程 电气工程
- 无线通信系统无线通信系统
- 集成电路设计 集成电路设计
背景情况:
- 高频发射器需要精确控制信号完整性,以满足严格的通信标准.
- 图像和局部振荡器 (LO) 泄漏信号是无线电频率 (RF) 前端的关键损害,降低了性能.
- 现有的解决方案往往需要复杂的制造后校准,增加成本和复杂性.
研究的目的:
- 开发一种在40-50 GHz频段运行的新型发射器 (TX) 前端.
- 整合振幅和相位失衡调整,以改善图像信号拒绝.
- 实施LO泄漏和图像信号抑制的自我校准机制.
主要方法:
- 设计一个带有集成振幅和相位不平衡调的微分方位混合器.
- 集成功率放大器 (PA) 用于信号放大.
- 集成一个检测混合器 (DM) 的LO泄漏和图像信号监控和校准.
- 使用相位方位 (IQ) 信号发生器用于LO信号生成和校准.
主要成果:
- 在40-50 GHz频段中实现了超过30dBc的图像信号拒绝,没有进行后校准.
- 通过集成校准模块,减少了超过10dB的LO泄漏.
- 在1GHz中间频率 (IF) 上保持1dB压缩输出功率 (OP1dB) 超过13.5dBm.
- 已证明符合IEEE 802.11aj标准,可达64次方格振幅调制 (QAM).
结论:
- 拟议的TX前端通过集成校准有效地抑制图像和LO泄漏信号.
- 该设计实现了高性能指标,包括输出功率和错误向量大小 (EVM),满足IEEE 802.11aj要求.
- 这种综合方法为下一代高频无线系统提供了强大的解决方案.
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